CN105025219A - Image acquisition method - Google Patents
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- CN105025219A CN105025219A CN201410183007.1A CN201410183007A CN105025219A CN 105025219 A CN105025219 A CN 105025219A CN 201410183007 A CN201410183007 A CN 201410183007A CN 105025219 A CN105025219 A CN 105025219A
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Abstract
The invention provides an image acquisition method, comprising the steps of providing a camera module which comprises an image acquisition unit, a liquid state lens unit and an image processing unit; acquiring a sharp image through the camera module; adjusting the aperture of the camera module; through adjusting a focusing distance by the liquid state lens unit, the image acquisition unit and the image processing unit analyzing object distance information in the sharp image; and adding or storing the object distance information into the sharp image.
Description
Technical field
The present invention relates to a kind of image acquiring method, espespecially a kind of image acquiring method that can obtain the object distance information of photo or picture.
Background technology
Image acquired by known imageing sensor is plane three-dimensional scenic being collapsed into two dimension, for can the interpretation object whichever of publishing picture in picture is nearly whichever easily by known experience is far away human eye, and be estimated size or the distance of other objects by the known object size occurred in image.But, for machine or software, the object distance in direct interpretation photo or picture signal to be a very difficult problem.
Usually for machine or software, all need extra device auxiliary interpretation, such as laser range finder, infrared ambulator, radar, sound wave, ultrasonic waves etc. carry out auxiliary interpretation.But laser range finder and infrared ambulator only have the range information of single-point or finite region.And radar, sound wave and supersonic range resolution ratio are poor, it all needs to adopt the mode regulated can contain whole region.
Although separately have the transducer developed and there is reaction at a high speed to overcome the restriction of above-mentioned single-point or finite region.But the transducer that this kind has an at a high speed reaction is that the time of light signal by measuring the distinctive signal light source (being generally infrared ray) sent by object under test surface reflection equipment is to calculate object distance.Therefore time out of doors, infrared light sources can be subject to the interference of sunlight and make measurement result inaccurate.
In addition, although separately have by extra information with the relative distance between computed image transducer and object, such as, simulate the framework of human eye, its be by two imageing sensors between relative distance calculate relative distance between object.But this technology not only needs outside plural imageing sensor, the relative position between imageing sensor also must control accurately, and image procossing also can be comparatively complicated on calculating.Therefore how to propose a kind of can object distance in interpretation photo or picture signal and interpretation information simultaneously can be made accurate, become the important topic of this art personage institute for solution already.
Summary of the invention
In view of above problem, the invention provides a kind of image acquiring method, it can obtain the range information of photo or picture.
To achieve the above object, a wherein embodiment of the present invention is to provide a kind of image acquiring method, it comprises the following steps: to provide a camera model, and wherein said camera model comprises an image acquisition unit, a liquid lens unit and a graphics processing unit; A picture rich in detail is obtained by described camera model; The aperture of described camera model is tuned up; Described image acquisition unit and described graphics processing unit by the focusing of described liquid lens unit from adjustment, to analyze the object distance information in described picture rich in detail; And described object distance information is additional or be stored in described picture rich in detail.
Wherein another embodiment of the present invention is to provide a kind of image acquiring method, its camera model comprising the following steps: to provide one to have the narrow depth of field of large aperture, wherein said camera model comprises an image acquisition unit, a liquid lens unit and a graphics processing unit; Described image acquisition unit by the focusing of described liquid lens unit from adjustment, to obtain multiple serial-grams of the different focus distance corresponding respectively to described liquid lens unit; Judge whether the photo in multiple serial-grams described has a clear object by described graphics processing unit, and analyze the range information of described clear object; And the described photo with described clear object is carried out superimposed, to form one, to present Vistavision dark and have the clear pictures of described clear object distance information.
Wherein another embodiment of the present invention is to provide a kind of image acquiring method, and it comprises the following steps: to provide a camera model; Obtain a picture rich in detail; Tune up the aperture of described camera model; Obtain the serial-gram of described camera model under different focus distance; Analyze the object distance information in described serial-gram; And described object distance information is additional or be stored in described picture rich in detail.
Beneficial effect of the present invention can be, the image acquiring method that the embodiment of the present invention provides, its by liquid lens unit focusing from adjustment and by the range information of image acquisition unit and graphics processing unit analytical calculation object, extra distance-measuring device or extra imageing sensor is not needed to make the present invention, and the amount of analysis of objects in images range information process is few, only need the quick focusing ability by liquid lens unit, and namely can obtain object distance information rapidly by the simple analytical calculation of graphics processing unit.In addition, the present invention is not subject to the impact of external environment, only needs clearly image and namely can carry out computing, and can obtain comprehensive object distance information, and not only only have the object distance information of single-point or finite region.Further it, the present invention can also be applied on automobile-used radar for backing car, or is the use that can be applicable to three-dimensional information getter, and it is specially adapted to the purposes closely sensed.
Further understand feature of the present invention and technology contents for enable, refer to following detailed description for the present invention and accompanying drawing, but institute's accompanying drawings only provides with reference to and use is described, be not used for the present invention's in addition limitr.
Accompanying drawing explanation
Fig. 1 is image acquiring method block schematic diagram of the present invention.
Fig. 2 is the steps flow chart schematic diagram of first embodiment of the invention.
Fig. 3 is the steps flow chart schematic diagram of second embodiment of the invention.
Fig. 4 is focusing plane Principles of Regulation schematic diagram of the present invention.
The wherein picture rich in detail schematic diagram that Fig. 5 A obtains for first embodiment of the invention.
Fig. 5 B be first embodiment of the invention by as far as near focusing plane regulate schematic diagram.
Fig. 5 C is first embodiment of the invention wherein photo or a picture view with range information.
Fig. 6 A be second embodiment of the invention by as far as near focusing plane regulate schematic diagram.
Fig. 6 B is a second embodiment of the invention wherein clear pictures schematic diagram with range information.
[symbol description]
Picture rich in detail I
There is the clear pictures P of range information
Trees I1, P1
People I2, P2
Flower I3, P3
Camera model 1
Image acquisition unit 11
Liquid lens unit 12
Graphics processing unit 13
Control module 2
By as far as the first near distance D
0
By as far as near second distance D
1
By as far as the 3rd near distance D
2
By as far as the 4th near distance D
3
By as far as the 5th near distance D
4
By as far as the 6th near distance D
5
The depth of field 1 R1
The depth of field 2 R2
The depth of field 3 R3
The depth of field 4 R4
Embodiment
(the first embodiment)
First, refer to shown in Fig. 1, Fig. 2, Fig. 5 A to Fig. 5 B, first embodiment of the invention provides a kind of image acquiring method, it comprises the following steps: as step S200 provides a camera model 1, and camera model 1 comprises image acquisition unit 11, liquid lens unit 12 and a graphics processing unit 13.For example, one control module 2 can also be provided further, control module 2 is electrically connected at image acquisition unit 11, liquid lens unit 12 and graphics processing unit 13, controls image acquisition unit 11, liquid lens unit 12 and graphics processing unit 13 to make control module 2.
Then, as shown in step S202, intercepting a picture rich in detail I, is under a pre-iris setting, obtain a picture rich in detail I by camera model 1.For example, the f-number of pre-iris setting for obtaining when camera model 1 auto-focusing adjusts, such as, pre-iris setting can judge by the system in camera model 1 that f-number needs to be adjusted to how many, the multiple objects in obtained picture rich in detail can be known and present.In other words, during acquisition image, aperture and shutter are interlock values, camera model 1 meeting automatic light measuring, the environmentally weak adjustment optimum exposure time of light intensity and f-number, if in the camera model 1 that f-number is fixing, then optimum exposure time automatically can be adjusted to obtain clear photograph.
As shown in step S204, after completing obtain a picture rich in detail I under a pre-iris setting, the aperture of camera model 1 is tuned up or a predetermined value, to obtain the shooting effect of the narrow depth of field of large aperture.By the computing formula of the depth of field (Depth of field, DOF) at middle and long distance: DOF ≈ (2Ncf
2s
2)/(f
4-N
2c
2s
2), wherein DOF is the f-number of the depth of field, N representative shot, and c represents the diameter of the specific egative film form circle of confusion, the focal length of f representative shot, and behalf camera focusing is to the distance (object distance) of camera.Can understand, under specific egative film form, determine that the parameter of the depth of field is the focal length of camera lens, the f-number of camera lens and object distance.Therefore, when performing step S204 and the aperture of camera model 1 being adjusted to maximum, the most shallow depth of field of the picture rich in detail obtained camera model 1 for this reason.Generally common f-number 1.4,2,2.8,4,5.6,8,11,16,22,32, wherein more large aperture value can be less for aperture, and the shooting effect that the camera model 1 that the f-number that therefore by the control of control module, f-number can be adjusted to 2,1.4 or less makes presents the narrow depth of field of large aperture is beneficial to the use of follow-up object distance calculating.Then, shown in Fig. 4, Fig. 4 is focusing plane Principles of Regulation schematic diagrames.Short vertical line in Fig. 4 represents focusing plane, and horizontal linear above represents the depth of field.Generally speaking, focusing plane is more shallow the closer to its depth of field of image acquisition unit 11.The mechanism that the present invention adopts liquid lens unit 12 focusing plane to regulate, from as far as the image or the photo that closely obtain different focus distance continuously, designed by the regulated quantity of appropriate liquid lens unit 12, the consecutive image of acquired different focus distance or photo can be contained set shooting or obtain distance.For example, in Fig. 2 the R1 of the depth of field 1 be focusing from being depth of field when 2 meters, the R2 of the depth of field 2 be focusing from being depth of field when 2.5 meters, the R3 of the depth of field 3 be focusing from being depth of field when 3.5 meters, the R4 of the depth of field 4 is that focusing is from being depth of field when 5 meters.Liquid lens unit 12 regulate focusing from from as far as close to, regulate.And due to liquid lens unit 12 focusing plane regulation time fast (in <10ms grade), therefore can complete image adjustment fast.
Come again, as shown in step S206, image acquisition unit 11 and graphics processing unit 13 by the focusing of liquid lens unit 12 from adjustment, with each object distance information in analytical calculation picture rich in detail I.For example, a succession of narrow depth image group or the serial-gram that image acquisition unit 11 obtains different focus distance continuously within a short time is controlled by control module 2, control graphics processing unit 13 by control module 2 simultaneously and come a succession of narrow depth image group that analysis image acquiring unit 11 obtains or serial-gram, to obtain each object distance information in picture rich in detail I.
With the present invention, by the control of control module 2, the patten transformation of camera model 1 can be become range sweep pattern, with the focusing carrying out liquid lens unit 12 from regulate continuously fast.In step S206, image acquisition unit 11 and graphics processing unit 13 by the focusing of liquid lens unit 12 from adjustment, to obtain the serial-gram that multiple correspond respectively to the different focus distance of liquid lens unit 12, and simultaneously analytical calculation multiple correspond respectively to the serial-gram of the different focus distance of liquid lens unit 12, calculate each object distance information in picture rich in detail I with analysis meter.
Refer to shown in Fig. 5 A, for example, with the first embodiment, have trees I1, people I2 and flower I3 in picture rich in detail I, wherein these objects distance is each other not identical.Then, as shown in Figure 5 B, Fig. 5 B be first embodiment of the invention by as far as near focusing plane regulate schematic diagram.The control being controlled module 2 when liquid lens unit 12 carry out by as far as near focusing from adjustment in, be from shown in Fig. 5 B by as far as the first near distance D
0start to carry out to be adjusted to by as far as the 6th near distance D
5.In the adjustment process of liquid lens unit 12, image acquisition unit 11 can in different focusings from lower acquisition image, and when the focusing of object will have a clear portion from the image obtained time correct, and the focusing of its object of positional representation at place, clear portion is from being correct.
It is worth mentioning that, can judge whether the image obtained is focused correct and had clear portion by graphics processing unit 13, such as, utilize the concept of camera lens resolving power (Resolution), with modulation conversion method (Modulation Transfer Method, MTF) as image definition algorithm, calculate contrast (Contrast) and sharpness (Sharpness) numerical value of image, coordinate current the regulated distance of liquid lens unit 12 simultaneously, and the object distance information that can be calculated by graphics processing unit 13 analysis meter in clear portion.Or be judge whether the image obtained is focused correct and had clear portion by other definition algorithms.Therefore, by the focusing of known liquid lens unit 12 from, can be judged in this focusing from the contrast of lower obtained image or photo and sharpness by graphics processing unit 13 again, and understand this focusing under whether have the correct object of focusing, if be the object that focusing is correct via the judgement of contrast and sharpness, then the focusing that regulates of liquid lens unit 12 is from the distance being object.It is worth mentioning that, in order to reduce the analytic operation amount of graphics processing unit 13, can reduce for obtained image pixel, to improve the efficiency of analytic operation.
In other words, when image acquisition unit 11 obtain in the serial-gram of different focus distance, if the image border in photo has obvious change, between neighbor, larger namely to represent obtained photo be picture rich in detail for the difference value of its grey decision-making or Grad.Utilize these characteristics, by the serial-gram accessed by image acquisition unit 12, by the process of graphics processing unit 13, the definition numerical information as criterion can be obtained.In addition, there is fuzzy phenomenon in image, also may because of the deficiency of bit image high frequency signal, and low frequency energy is more, by the frequency domain filtering method of high pass filter, after trying to achieve image high-frequency information, as the foundation judged.
Therefore, by the mode in the clear portion of above-mentioned judgement, namely represent that the object distance information being arranged in clear portion to be used for multiple range informations of the multiple objects calculating picture rich in detail I obtained at the beginning.It should be noted that, image acquisition unit 11 and graphics processing unit 13 by the focusing of liquid lens unit 12 from adjustment, to calculate in the range information process of each object in picture rich in detail I, the aperture slot of camera model 1 can be along with liquid lens unit 12 focusing from adjustment and change to some extent, in other words, namely the aperture of camera model 1 can be floating in the image acquisition procedures of image acquisition unit 11, can by focusing from change or via carrying out after judgment object range information being adjusted to a predetermined value, make its meet this focusing under suitable f-number.
For example, when liquid lens unit 12 is adjusted to by as far as the first near distance D
0time, by image acquisition unit 11 first obtain this focusing from image, judge that this focusing is from whether having focusing correctly the first clear portion via graphics processing unit 13 again, if when having the first clear portion, graphics processing unit 13 can analyze the object distance information in the first clear portion in picture rich in detail I.When being adjusted to by as far as near second distance D
1time, by image acquisition unit 11 first obtain this focusing from image, judge that this focusing is from whether having focusing correctly the second clear portion via graphics processing unit 13 again, if when having the second clear portion, graphics processing unit 13 can analyze the object distance information in the second clear portion in picture rich in detail I.When being adjusted to by as far as the 3rd near distance D
2time, by image acquisition unit 11 first obtain this focusing from image, judge that this focusing is from whether having the 3rd correct clear portion of focusing via graphics processing unit 13 again, if when having the 3rd clear portion, graphics processing unit 13 can analyze the object distance information in the 3rd clear portion in picture rich in detail I.When being adjusted to by as far as the 4th near distance D
3time, by image acquisition unit 11 first obtain this focusing from image, judge that this focusing is from whether having the 4th correct clear portion of focusing via graphics processing unit 13 again, if when having the 4th clear portion, graphics processing unit 13 can analyze the object distance information in the 4th clear portion in picture rich in detail I.When being adjusted to by as far as the 5th near distance D
4time, by image acquisition unit 11 first obtain this focusing from image, judge that this focusing is from whether having the 5th correct clear portion of focusing via graphics processing unit 13 again, if when having the 5th clear portion, graphics processing unit 13 can analyze the object distance information in the 5th clear portion in picture rich in detail I.When being adjusted to by as far as the 6th near distance D
5time, by image acquisition unit 11 first obtain this focusing from image, judge that this focusing is from whether having the 6th correct clear portion of focusing via graphics processing unit 13 again, if when having the 6th clear portion, graphics processing unit 13 can analyze the object distance information in the 6th clear portion in picture rich in detail I.It should be noted that, except above-mentioned image acquisition unit 11 by the focusing of liquid lens unit 12 from adjustment, correspond respectively in the process of the serial-gram of the different focus distance of liquid lens unit 12 to obtain multiple, graphics processing unit 13 analytical calculation simultaneously is often opened outside the mode of object distance information in serial-gram, also can be after the narrow depth image group or serial-gram first having obtained a succession of different focus distance until image acquisition unit 11, narrow depth image group or the serial-gram of this succession of different focus distance of analytical calculation is carried out again by graphics processing unit 13, to obtain the object distance information in clear portion in the narrow depth image group of this succession of different focus distance or serial-gram.
Therefore, as shown in Figure 5 B, with the present embodiment, when liquid lens unit 12 is adjusted to by as far as the first near distance D
0time, by the judgement of graphics processing unit 13, this focusing under be clearly with the trees I1 in picture rich in detail I, so the range information of trees I1 in clear area is focal length value.When being adjusted to by as far as near second distance D
1time, by the judgement of graphics processing unit 13, this focusing under do not have object clearly, therefore do not have any range information to utilize.When being adjusted to by as far as the 3rd near distance D
2time, by the judgement of graphics processing unit 13, this focusing under be clearly with the people I2 in picture rich in detail I, so the range information of people I2 in clear area is focal length value.When being adjusted to by as far as the 4th near distance D
3time, by the judgement of graphics processing unit 13, this focusing under do not have object clearly, therefore do not have any range information to utilize.When being adjusted to by as far as the 5th near distance D
4time, by the judgement of graphics processing unit 13, this focusing under be clearly with the flower I3 in picture rich in detail I, so the range information of flower I3 in clear area is focal length value.When being adjusted to by as far as the 6th near distance D
5time, by the judgement of graphics processing unit 13, this focusing under do not have object clearly, therefore do not have any range information to utilize.
Finally, as shown in step S208, object distance information is added or is stored in picture rich in detail I.For example, can by this object distance information indicating in picture rich in detail I, press down or be stored in the archives of picture rich in detail I, be beneficial to the basis of successive image process.Such as, can, by the control of control module 2, via graphics processing unit 13 or additionally by a signaling module, multiple object distance information and picture rich in detail I be carried out superimposed, to form photo or the picture that has multiple object distance information.When continuing above-mentioned action, just can Continuous Play and be formed in image picture indicating all objects distance.Therefore, with the present embodiment, after laminating step, the trees I1 in picture rich in detail I, people I2 and flower I3 can be combined with object distance information, to obtain the distance value of trees I1, people I2 and flower I3 in picture rich in detail I.As shown in Figure 5 C, the trees I1 after laminating step in picture rich in detail I can have the first distance D
0distance value, the people I2 in picture rich in detail I can have the 3rd distance D
2distance value, the flower I3 in picture rich in detail I can have the 5th distance D
4distance value.Furthermore, it is regulate by as far as near mode that the adjustable range of liquid lens unit 12 does not limit yet, and the adjustable range of liquid lens unit 12 also can be that mode from the near to the remote regulates.
With the present invention, also can carry out meticulousr distance adjustment by liquid lens unit 12 and obtain object distance information more accurately, when obtained object distance information is meticulousr, the photo with object distance information formed or picture will be more accurate, for example, when the rough object distance information of only carrying out rough distance adjustment and obtaining, for the judgement of object distance information, its difference may be comparatively large, such as, can only judge the positional distance camera model 1 about 5 meters to 10 meters of this object.But, if by meticulousr distance adjustment, may can obtain object distance information more accurately, such as, can judge the positional distance camera model 1 about 7 meters to 8 meters of this object further.These two kinds of difference just come from the depth of the depth of field and the variable quantity of liquid lens unit 12 distance adjustment.In addition, if work as obtained object distance information less time, time as comparatively coarse in resolution, also can carry out the distance of judgment object by the calculating of interpolation method and analyze object distance information more accurately, to improve resolution.Coordinating the calculating of interpolation method by intercepting less object distance information, the operand of graphics processing unit 13 or signal processing module can be made to reduce, and promote superimposed efficiency.Further it, graphics processing unit 13, signal processing module and control module 2 also can be computer or be connected with computer, make the differentiation of lamination process and object distance information transfer to computer perform computing.And graphics processing unit 13, signal processing module and control module 2 also can be Embedded system, its function class, like computer, can complete the differentiation of lamination process and object distance information.
The image acquiring method that first embodiment of the invention provides, namely camera model 1 by generally having liquid lens unit 12 can perform, only need the image acquiring method coordinating this first embodiment to provide, multiple range informations of multiple object are added or is stored in picture rich in detail I, or directly and picture rich in detail I carry out superimposed, namely can obtain photo or the picture of multiple range informations with multiple object.And when non-carries out image acquisition methods, camera model 1 can be used as the purposes of general pick-up lens.In other words, the first embodiment is by the following step: provide a camera model; Obtain a picture rich in detail; Tune up the aperture of described camera model; Intercept the serial-gram of described camera model under different focus distance; Analyze the object distance information in described serial-gram; And the mode in described picture rich in detail is added or be stored to described object distance information, obtain the range information between each object and camera model 1 in picture rich in detail I.
(the second embodiment)
First, refer to Fig. 1, Fig. 3, shown in Fig. 6 A to Fig. 6 B, second embodiment of the invention provides a kind of image acquiring method, wherein the second embodiment and the maximum difference of the first embodiment are, second embodiment can utilize a camera model 1 or with the narrow depth of field of large aperture to have the camera model 1 of predetermined f-number, simultaneously also without the need to obtaining a picture rich in detail I in advance, only need when image acquisition unit 11 obtains the image of clear area simultaneously by graphics processing unit 13 analytical calculation object distance information, the last superimposed action carrying out image and object distance information again.
Then, as shown in Figure 3, second embodiment of the invention provides a kind of image acquiring method, and it comprises the following steps: the camera model 1 as step S300 provides to have the narrow depth of field of large aperture, and camera model 1 comprises image acquisition unit 11, liquid lens unit 12 and a graphics processing unit 13.For example, can also provide a control module 2 further, control module 2 is electrically connected at image acquisition unit 11, liquid lens unit 12 and graphics processing unit 13 to control image acquisition unit 11 and liquid lens unit 12 and graphics processing unit 13.In addition, camera model 1 can have the feature of the narrow depth of field of large aperture, wherein, in order to enable the depth of field shallow, therefore large aperture can use f-number be 2,1.4 or less f-number, to make aperture can be comparatively large, and the depth of field enable be more shallow or narrower.
Then, refer to Fig. 6 A and shown in matching step S302, image acquisition unit 11 by the focusing of liquid lens unit 12 from adjustment, to obtain multiple image sets corresponding respectively to the continuous narrow depth of field of the different focus distance of liquid lens unit 12 or photos at short notice continuously.Simultaneously, refer to shown in Fig. 6 A, and coordinate the focusing plane Principles of Regulation of Fig. 4, carry out step S302 camera model 1 by the focusing of liquid lens unit 12 from adjustment, correspond respectively to a succession of narrow depth image group of liquid lens unit 12 under different focus distance or photo to obtain.Such as control image acquisition unit 11 by control module 2 to obtain.
Then, as shown in step S304, whether the photo judged in multiple serial-grams by graphics processing unit 13 has a clear object, and calculates the range information of clear object.Shown in Fig. 6 A and Fig. 6 B, Fig. 6 A be second embodiment of the invention by as far as near focusing plane regulate schematic diagram.The control being controlled module 2 when liquid lens unit 12 carry out by as far as near focusing from adjustment in, be from shown in Fig. 6 A by as far as the first near distance D
0start to carry out regulating until by as far as the 6th near distance D
5.In the adjustment process of liquid lens unit 12, image acquisition unit 11 has clear portions different separately in different focusings from lower obtained image, therefore when focusing can have a clear portion from the photo obtained time correct, when obtained photo is fuzzy, represent this focusing under do not have corresponding object, so the focusing of its object of positional representation at place, clear portion is from being correct.
For example, when liquid lens unit 12 is adjusted to by as far as the first near distance D
0time, by image acquisition unit 11 first obtain this focusing from image or photo, judge that this focusing is from whether having the first correct clear portion of focusing via graphics processing unit 13 again, if when there is the first clear portion, graphics processing unit 13 can analyze this focusing from image or photo in the object distance information in the first clear portion.When being adjusted to by as far as near second distance D
1time, by image acquisition unit 11 first obtain this focusing from image or photo, judge that this focusing is from whether having the second correct clear portion of focusing via graphics processing unit 13 again, if when there is the second clear portion, graphics processing unit 13 can analyze this focusing from image or photo in the object distance information in the second clear portion.When being adjusted to by as far as the 3rd near distance D
2time, by image acquisition unit 11 first obtain this focusing from image or photo, judge that this focusing is from whether having the 3rd correct clear portion of focusing via graphics processing unit 13 again, if when there is the 3rd clear portion, graphics processing unit 13 can analyze this focusing from image or photo in the object distance information in the 3rd clear portion, when being adjusted to by when the 4th near distance D3, by image acquisition unit 11 first obtain this focusing from image or photo, judge that this focusing is from whether having the 4th correct clear portion of focusing via graphics processing unit 13 again, if when there is the 4th clear portion, graphics processing unit 13 can analyze this focusing from image or photo in the object distance information in the 4th clear portion.When being adjusted to by as far as the 5th near distance D
4time, by image acquisition unit 11 first obtain this focusing from image or photo, judge that this focusing is from whether having the 5th correct clear portion of focusing via graphics processing unit 13 again, if when there is the 5th clear portion, graphics processing unit 13 can analyze this focusing from image or photo in the object distance information in the 5th clear portion.When being adjusted to by as far as the 6th near distance D
5time, by image acquisition unit 11 first obtain this focusing from image or photo, judge that this focusing is from whether having the 6th correct clear portion of focusing via graphics processing unit 13 again, if when there is the 6th clear portion, graphics processing unit 13 can analyze this focusing from image or photo in the object distance information in the 6th clear portion.Then, the object distance information analyzed via graphics processing unit 13 can add or be stored in the middle of image out of the ordinary corresponding or photo.
Therefore, as shown in Figure 6B, with the present embodiment, when liquid lens unit 12 is adjusted to by as far as the first near distance D
0time, via image acquisition unit 11 obtain correspond to the focusing that regulates of liquid lens unit 12 under image or photo by the judgement of graphics processing unit 13, clearly in this focusing from the trees P1 in lower obtained photo, will the range information of analytical calculation trees P1.When being adjusted to by as far as near second distance D
1time, via image acquisition unit 11 obtain correspond to the focusing that regulates of liquid lens unit 12 under image or photo by the judgement of graphics processing unit 13, this focusing under do not have object clearly, therefore do not have any range information and photo to utilize.When being adjusted to by as far as the 3rd near distance D
2time, via image acquisition unit 11 obtain correspond to the focusing that regulates of liquid lens unit 12 under image or photo by the judgement of graphics processing unit 13, clearly in this focusing from the people P2 in lower obtained photo, will the range information of analytical calculation people P2.When being adjusted to by as far as the 4th near distance D
3time, via image acquisition unit 11 obtain correspond to the focusing that regulates of liquid lens unit 12 under image or photo by the judgement of graphics processing unit 13, this focusing under do not have object clearly, therefore do not have any range information and photo to utilize.When being adjusted to by as far as the 5th near distance D
4time, via image acquisition unit 11 obtain correspond to the focusing that regulates of liquid lens unit 12 under image or photo by the judgement of graphics processing unit 13, be clearly in this focusing from the flower P3 in lower obtained photo, the range information of flower P3 will be obtained.When being adjusted to by as far as the 6th near distance D
5time, via image acquisition unit 11 obtain correspond to the focusing that regulates of liquid lens unit 12 under image or photo by the judgement of graphics processing unit 13, this focusing under do not have object clearly, therefore do not have any range information and photo to utilize.
Finally, shown in Fig. 6 B and step S306, the photo with clear object is carried out superimposed, to form one, to present Vistavision dark and have the clear pictures of clear object distance information, be that the photo each with clear object carries out superimposed or photo part with clear object and carries out superimposed in this step, to form one, to present Vistavision dark and have the clear pictures P of clear object distance information.With the present embodiment, as shown in Figure 6B, after laminating step, its trees P1 had in the clear pictures P of range information can have the first distance D
0distance value, the people P2 had in the clear pictures P of range information can have the 3rd distance D
2distance value, the flower P3 had in the clear pictures P of range information can have the 5th distance D
4distance value.It should be noted that, the embodiment of the present invention can by additional by the serial-gram of different focus distance and object distance information or be stored to a signaling module and undertaken superimposed by multiple serial-grams, and to obtain one, to present Vistavision dark and have the clear pictures P of range information.Further it, graphics processing unit 13, signal processing module can be computers or be connected with computer, make the differentiation of lamination process and object distance information transfer to computer perform computing.And graphics processing unit 13, signal processing module and control module 2 also can be Embedded system, its function class, like computer, can complete the differentiation of lamination process and object distance information.Furthermore, it is regulate by as far as near mode that the adjustable range of liquid lens unit 12 does not limit yet, and the adjustable range of liquid lens unit 12 also can be that mode from the near to the remote regulates.
In addition, if work as multiple obtained serial-grams less time, also the distance can coming between judgment object by the calculating of interpolation method, the calculating of interpolation method is coordinated by intercepting less multiple serial-grams P ', the operand of graphics processing unit 13, signal processing module or control module 2 can be made to reduce, and promote formed to present Vistavision dark and have the superimposed efficiency of the clear pictures of range information, and can resolution be improved.Further it, graphics processing unit and control module 2 can be computers, make the differentiation of lamination process and object distance information transfer to computer perform computing.And graphics processing unit and control module 2 also can be Embedded systems, its function class, like computer, can complete the differentiation of lamination process and object distance information.It should be noted that, with second embodiment of the invention, also can after completing a succession of narrow depth image group of shooting different focus distance continuously in the short time, first the image sets with clear object is carried out superimposed, then calculate the range information of superimposed rear objects in images by control module 2 or graphics processing unit.
The image acquiring method that second embodiment of the invention provides, the camera model 1 having the narrow depth of field of large aperture by carries out superimposed again after obtaining multiple serial-grams, to form one, to present Vistavision dark and have the clear pictures of range information.
The foregoing is only preferred possible embodiments of the present invention, non-ly therefore limit to the scope of the claims of the present invention, therefore the equivalence techniques change of such as using specification of the present invention and graphic content to do, be all contained in protection scope of the present invention.
Claims (10)
1. an image acquiring method, is characterized in that, described image acquiring method comprises the following steps:
There is provided a camera model, wherein said camera model comprises an image acquisition unit, a liquid lens unit and a graphics processing unit;
A picture rich in detail is obtained by described camera model;
The aperture of described camera model is tuned up;
Described image acquisition unit and described graphics processing unit by the focusing of described liquid lens unit from adjustment analyze an object distance information in described picture rich in detail; And
Described object distance information is added or is stored in described picture rich in detail.
2. image acquiring method according to claim 1, wherein said image acquisition unit, described liquid lens unit and described graphics processing unit are all electrically connected at a control module.
3. image acquiring method according to claim 2, wherein said image acquisition unit obtains described picture rich in detail by the control of described control module, the aperture of described camera model by the control of described control module to tune up, described liquid lens unit by the control of described control module regulate focusing from, and described object distance information and described picture rich in detail are undertaken adding or storing by the control of described control module.
4. image acquiring method according to claim 1, wherein described image acquisition unit and described graphics processing unit by the focusing of described liquid lens unit from adjustment calculate in the step of the described object distance information in described picture rich in detail, after described image acquisition unit first obtains a serial-gram, described graphics processing unit analyzes the described object distance information in described serial-gram again.
5. image acquiring method according to claim 1, the focusing of wherein said liquid lens unit from by as far as close to or regulate from the near to the remote.
6. an image acquiring method, is characterized in that, described image acquiring method comprises the following steps:
There is provided the camera model that has the narrow depth of field of large aperture, wherein said camera model comprises an image acquisition unit, a liquid lens unit and a graphics processing unit;
Described image acquisition unit by the focusing of described liquid lens unit from adjustment, to obtain multiple serial-grams of the different focus distance corresponding respectively to described liquid lens unit;
Judge whether the photo in multiple serial-grams described has a clear object by described graphics processing unit, and analyze the range information of described clear object; And
Undertaken superimposed by the described photo with described clear object, to form one, to present Vistavision dark and have the clear pictures of the range information of described clear object.
7. image acquiring method according to claim 6, wherein said image acquisition unit, described liquid lens unit and described graphics processing unit are all electrically connected at a control module.
8. image acquiring method according to claim 7, wherein said liquid lens unit by the control of described control module regulate focusing from, described image acquisition unit obtains multiple serial-grams described by the control of described control module, and the described clear object in described photo is undertaken superimposed by the control of described control module.
9. image acquiring method according to claim 6, the focusing of wherein said liquid lens unit from by as far as close to or regulate from the near to the remote.
10. an image acquiring method, is characterized in that, described image acquiring method comprises the following steps:
One camera model is provided;
Obtain a picture rich in detail;
Tune up the aperture of described camera model;
Obtain the serial-gram of described camera model under different focus distance;
Analyze the object distance information in described serial-gram; And
Described object distance information is added or is stored in described picture rich in detail.
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