CN102466962A - Stereoscopic image generation method and stereoscopic imaging system - Google Patents
Stereoscopic image generation method and stereoscopic imaging system Download PDFInfo
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Abstract
The invention provides a stereoscopic image generation method and a stereoscopic imaging system. The method comprises the steps of shooting a left eye image and a right eye image by using the left lens and the right lens respectively, analyzing the left eye image and the right eye image to find out a left eye overlapped image and a right eye overlapped image which are overlapped, calculating color parameters of the left eye overlapped image and the right eye overlapped image respectively, adjusting the color parameters of the left eye image and the right eye image according to the color parameters to enable the color parameters of the left eye overlapped image and the right eye overlapped image to be consistent, and outputting the adjusted left eye image and the adjusted right eye image to serve as a three-dimensional image.
Description
Technical field
The present invention relates to a kind of image generating method and imaging system, relate in particular to a kind of stereopsis production method and stereo imaging system.
Background technology
Stereoscopic camera is made up of the identical twin-lens of specification, and the spacing distance of this twin-lens is about 7.7 centimeters, in order to the actual range of simulation human eye.Parameters such as the focal length of this twin-lens, aperture, shutter then are by the control of the processor of stereoscopic camera, and via the triggering of cable release, can shoot the same area but the different image in visual angle, and this image promptly is the image in order to the simulating human right and left eyes.
Surpassing the frequency Alternation Display that human eye vision persists, and collocation is worn over the switching of the liquid crystal shutter glasses of human head to the right and left eyes image of being taken by stereoscopic camera, makes human right and left eyes can watch corresponding right and left eyes image via display device.After this right and left eyes image is transmitted to cerebral cortex, promptly can it be fused into single image by cortical centre.Because the captured right and left eyes image of stereoscopic camera has a little difference on angle, the image that therefore on retina, forms also can have certain parallax, and human merge two via cortical centre in the different image in visual angle, promptly can produce stereoscopic sensation.
Though the left and right sides camera lens of stereoscopic camera is to use identical parameter to take the image of the same area; But owing to can there be a little difference in the OPTICAL SENSORS in two camera lenses or the camera lens; Even if under the parameter of being controlled and all identical situation of employed image pickup method; The captured image that comes out of stereoscopic camera is in the difference to some extent that appears still of brightness or color, and this difference will cause two images of being looked of beholder to mate inadequately, and then has influence on the imaging effect of stereopsis.
Summary of the invention
The present invention provides a kind of stereopsis production method, can make the brightness of the captured right and left eyes image of stereo imaging system consistent with colourity.
The present invention provides a kind of stereopsis production method, is applicable to the stereo imaging system that comprises left camera lens and right camera lens.The method is utilized left camera lens and right lens shooting left-eye images and right-eye image respectively; Then analyze this left-eye images and right-eye image; To find out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image respectively; Calculate the color parameter of left eye superimposed image and right eye superimposed image then respectively, and adjust whole the left-eye images and the color parameter of right-eye image according to this, make the left eye superimposed image consistent with the color parameter of right eye superimposed image; Then export adjusted left-eye images and right-eye image at last, with as stereopsis.
In one embodiment of this invention; Above-mentioned analysis left-eye images and right-eye image; Comprise a plurality of characteristics in acquisition left-eye images and the right-eye image with the step of finding out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image respectively; And, distinguish left eye superimposed image and the right eye superimposed image in the right-eye image in the left-eye images according to the zone that same characteristic features in these characteristics is contained.
In one embodiment of this invention; Above-mentioned analysis left-eye images and right-eye image; Comprise size with the step of finding out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image respectively, find out left eye superimposed image and right eye superimposed image according to the CIS of the camera lens spacing between left camera lens and the right camera lens and left camera lens and right camera lens.
In one embodiment of this invention; The left-eye images that above-mentioned adjustment is whole and the color parameter of right-eye image; Make the left eye superimposed image step consistent comprise that one of them is a benchmark with left-eye images and right-eye image with the color parameter of right eye superimposed image; Adjust the color parameter of another image, make the left eye superimposed image consistent with the color parameter of right eye superimposed image.
In one embodiment of this invention; The left-eye images that above-mentioned adjustment is whole and the color parameter of right-eye image; Make the left eye superimposed image step consistent comprise the mean value and the standard deviation of the color parameter of calculating left eye superimposed image and right eye superimposed image with the color parameter of right eye superimposed image; And adjust whole the left-eye images and the color parameter of right-eye image, make it consistent with mean value that is calculated and standard deviation.
In one embodiment of this invention, the above-mentioned step of calculating the color parameter of left eye superimposed image and right eye superimposed image respectively comprises brightness (Y) and the chromatic component (Cb, Cr) that calculates left eye superimposed image and right eye superimposed image respectively.
In one embodiment of this invention; The left-eye images that above-mentioned adjustment is whole and the color parameter of right-eye image; Make the left eye superimposed image step consistent comprise the left-eye images of whole of adjustment and the brightness of right-eye image with the color parameter of right eye superimposed image; Make the left eye superimposed image consistent, adjust whole the left-eye images and the colourity of right-eye image then, make the left eye superimposed image consistent with the colourity of right eye superimposed image with the brightness of right eye superimposed image.
In one embodiment of this invention, the above-mentioned step of calculating the color parameter of left eye superimposed image and right eye superimposed image respectively comprises red, green, blue (RGB) chromatic component that calculates left eye superimposed image and right eye superimposed image respectively.
In one embodiment of this invention; The left-eye images that above-mentioned adjustment is whole and the color parameter of right-eye image; Make the left eye superimposed image step consistent comprise and adjust whole left-eye images and the red, green, blue of right-eye image (RGB) colourity respectively, make the left eye superimposed image consistent with the red, green, blue colourity of right eye superimposed image with the color parameter of right eye superimposed image.
The present invention provides a kind of stereo imaging system, and it comprises left camera lens, right camera lens and processing unit.Wherein, left camera lens is in order to take left-eye images, and right camera lens has a camera lens spacing in order to take right-eye image between this left camera lens and the right camera lens.Processing unit couples left camera lens and right camera lens; And in order to analyze left-eye images and right-eye image; To find out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image respectively; And calculate a color parameter of left eye superimposed image and right eye superimposed image respectively, and adjust the color parameter of whole left-eye images and right-eye image according to this, make the left eye superimposed image consistent with the color parameter of right eye superimposed image; And export adjusted left-eye images and right-eye image, with as stereopsis.
Based on above-mentioned; Stereopsis production method of the present invention and stereo imaging system are through the color parameter of the overlapping region of the captured right and left eyes image of calculating stereo imaging system; And in order to the brightness of proofreading and correct whole image of right and left eyes image or the deviation of colourity, and can obtain the right and left eyes image that brightness or colourity match each other.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and conjunction with figs. elaborates as follows.
Description of drawings
Fig. 1 is the calcspar according to the stereo imaging system that one embodiment of the invention showed.
Fig. 2 is the process flow diagram according to the stereopsis production method that one embodiment of the invention showed.
Fig. 3 (a), Fig. 3 (b) are the examples according to the stereopsis production method that one embodiment of the invention showed.
Fig. 4 (a), Fig. 4 (b) are the examples according to the stereopsis production method that one embodiment of the invention showed.
Fig. 5 is the process flow diagram according to the stereopsis production method that one embodiment of the invention showed.
Fig. 6 is the process flow diagram according to the stereopsis production method that one embodiment of the invention showed.
Main description of reference numerals:
100: stereo imaging system; 110: left camera lens;
120: right camera lens;
S210～S250: the step of the stereopsis production method of one embodiment of the invention;
S510～S560: the step of the stereopsis production method of one embodiment of the invention;
S610～S650: the step of the stereopsis production method of one embodiment of the invention.
Embodiment
It is equitant each other zone that there is a very big zone the captured right and left eyes image centre of stereo imaging system; Though the object in this overlapping region can have a little aberration because of the difference of right and left eyes lens shooting angle, whole basically content is identical.Therefore, the image that if will solve brightness or the chromaticity distortion between the right and left eyes image, will be directed against this overlapping region in theory exactly, has an identical content thing is done correction, the best results of gained.And will extend to whole right and left eyes image to the adjustment that this overlapping region image is done, finally can obtain the stereopsis that brightness, colourity all are complementary.
In detail, Fig. 1 is the calcspar according to the stereo imaging system that one embodiment of the invention showed.Please with reference to Fig. 1, the stereo imaging system 100 of present embodiment for example is a stereoscopic camera, and it comprises left camera lens 110, right camera lens 120 and processing unit 130.
All dispose the photo-sensitive cell (not shown) in left side camera lens 110 and the right camera lens 120, get into the light intensity of left camera lens 110 and right camera lens 120 in order to sensing respectively, and then produce left-eye images and right-eye image.Described photo-sensitive cell for example be charge coupled cell (Charge Coupled Device, CCD), complementary matal-oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS) do not limit at this by element or other elements.In addition, for example have the camera lens spacing that is about 77 millimeters between left camera lens 110 and the right camera lens 120, and can simulate the distance between true human eye.
In detail, Fig. 2 is the process flow diagram according to the stereopsis production method that one embodiment of the invention showed.Please be simultaneously with reference to Fig. 1 and Fig. 2; The method of present embodiment is applicable to the stereo imaging system 100 of Fig. 1; Be suitable for when the user utilizes stereo imaging system 100 shooting stereo images, the difference between correction left-eye images and right-eye image on brightness and the colourity is to produce the stereopsis that color is complementary.Below promptly the arrange in pairs or groups various elements of stereo imaging system 100 of Fig. 1, the detailed step of present embodiment method is described:
Utilize left camera lens 110 and right camera lens 120 to take left-eye images and right-eye image (step S210) at first, respectively.Wherein, left camera lens 110 and right camera lens 120 for example are to adopt identical parameter filmed image, and described parameter comprises focal length, aperture, shutter, white balance etc., does not limit at this.
Then, analyze left-eye images and right-eye image by processing unit 130, to find out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image (step S220) respectively.Wherein, processing unit 130 is a plurality of characteristics in fechtable left-eye images and the right-eye image for example, and according to the zone that same characteristic features in these characteristics is contained, and distinguish left eye superimposed image and the right eye superimposed image in the right-eye image in the left-eye images.On the other hand, processing unit 130 also can be found out left eye superimposed image and right eye superimposed image according to the size of the CIS of the camera lens spacing between left camera lens and the right camera lens and left camera lens and right camera lens.
After finding out left eye superimposed image and right eye superimposed image, processing unit 130 promptly calculates the color parameter (step S230) of left eye superimposed image and right eye superimposed image respectively.Wherein, Processing unit 130 for example can calculate the brightness (Y) and the chromatic component (Cb, Cr) of left eye superimposed image and right eye superimposed image respectively; Or red, green, blue (RGB) chromatic component of calculating left eye superimposed image and right eye superimposed image, with foundation as follow-up correction.
Color parameter according to aforementioned calculation; Processing unit 130 can further be adjusted whole the left-eye images and the color parameter of right-eye image; And make the color parameter consistent (step S240) of left eye superimposed image and right eye superimposed image, at last then with adjusted left-eye images and right-eye image output as stereopsis (step S250).In detail, because the left eye superimposed image is identical with content in the right eye superimposed image, and the shooting environmental of two images is also identical, so color parameter such as the brightness of its image of taking out, colourity ought to be identical.In view of the above; Present embodiment is promptly adjusted and is proofreaied and correct to the right and left eyes image in this overlapping region; And with the adjustment scope extend to whole right and left eyes image; Make no matter final adjusted right and left eyes image is that brightness or color that it showed are unanimity in the overlapping region or in Non-overlapping Domain.
What need explanation is, the adjustment mode of above-mentioned right and left eyes image for example is that one of them is benchmark or is that benchmark adjusts with both mean value with left-eye images and right-eye image, does not limit at this.In detail, processing unit 130 can one of them adjusts the color parameter of another image as benchmark with left-eye images and right-eye image, and makes the left eye superimposed image consistent with the color parameter of right eye superimposed image.On the other hand; Processing unit 130 also can calculate the mean value and the standard deviation of the color parameter of left eye superimposed image and right eye superimposed image; Adjust whole the left-eye images and the color parameter of right-eye image more in view of the above, make that its adjusted color parameter is consistent with mean value that is calculated and standard deviation.
For instance, Fig. 3 (a), Fig. 3 (b), Fig. 4 (a), Fig. 4 (b) are the examples according to the stereopsis production method that one embodiment of the invention showed.Wherein, Fig. 3 (a), Fig. 3 (b) represent captured left-eye images of stereo imaging system and right-eye image respectively, and Fig. 4 (a), Fig. 4 (b) then show the color range distribution plan of all pixels in the overlapping region of this left-eye images and right-eye image respectively.Can know that by Fig. 3 (a), Fig. 3 (b) brightness of left-eye images and right-eye image has a little difference, its reason possibly be each image individual processing caused inharmonious.If the color range distribution plan of analysis chart 4 (a), Fig. 4 (b) can know that the average brightness of left-eye images is higher, so the decidable left-eye images is bright partially.This moment can be through heightening the brightness of right-eye image simply, or the brightness of left-eye images is turned down, and be in harmonious proportion the difference of brightness between the two.Perhaps, also can the brightness unification of left-eye images and right-eye image be adjusted to both mean value, can obtain identical effect equally.
Except the difference of brightness; If consider the difference on the colourity again; The present invention also can calculate its chromatic value on the different color space respectively to the right and left eyes image, and combines above-mentioned adjustment mechanism to be in harmonious proportion the color distortion between the right and left eyes image, thereby obtains preferable stereopsis.Specify with the next embodiment that lifts again.
Fig. 5 is the process flow diagram according to the stereopsis production method that one embodiment of the invention showed.Please be simultaneously with reference to Fig. 1 and Fig. 5; The method of present embodiment is applicable to the stereo imaging system 100 of Fig. 1; Be suitable for when the user utilizes stereo imaging system 100 shooting stereo images; Through calculating the brightness (Y) and the chromatic component (Cb, Cr) of left-eye images and the overlapping region of right-eye image, proofread and correct according to this left-eye images and right-eye image between difference on brightness and the colourity, the stereopsis that is complementary with the generation color.Below promptly the arrange in pairs or groups various elements of stereo imaging system 100 of Fig. 1, the detailed step of present embodiment method is described:
Utilize left camera lens 110 and right camera lens 120 to take left-eye images and right-eye image (step S510) at first, respectively.Then, analyze left-eye images and right-eye image by processing unit 130, to find out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image (step S520) respectively.The detailed content of above step S510～S520 and the step S210 of previous embodiment～S220 are same or similar, so repeat no more at this.
Different with previous embodiment is that present embodiment is calculated the brightness (Y) and the chromatic component (Cb, Cr) (step S530) of left eye superimposed image and right eye superimposed image respectively by processing unit 130 after finding out left eye superimposed image and right eye superimposed image.Then, processing unit 130 promptly according to the brightness of the right and left eyes image that is calculated, is adjusted whole the left-eye images and the brightness of right-eye image, makes left eye superimposed image consistent with the brightness of right eye superimposed image (step S540).Then, processing unit 130 is adjusted the colourity of whole left-eye images and right-eye image again according to the colourity of the right and left eyes image that is calculated, and makes the colourity consistent (step S550) of left eye superimposed image and right eye superimposed image.Then adjusted left-eye images and right-eye image are exported as stereopsis (step S560) at last.
Through the above-mentioned method of stage by stage brightness and colourity being adjusted, progressively adjust the brightness and the colourity of left-eye images and right-eye image, finally can obtain the stereopsis that brightness and colourity are in harmonious proportion.
On the other hand, the present invention also can be directly progressively adjust to the chromatic value on other color spaces, treat that all colourities are all adjusted after, can obtain the stereopsis that brightness and colourity are in harmonious proportion equally, specify with the next embodiment that lifts again.
Fig. 6 is the process flow diagram according to the stereopsis production method that one embodiment of the invention showed.Please be simultaneously with reference to Fig. 1 and Fig. 6; The method of present embodiment is applicable to the stereo imaging system 100 of Fig. 1; Be suitable for when the user utilizes stereo imaging system 100 shooting stereo images; Through calculating red, green, blue (RGB) chromatic component of left-eye images and the overlapping region of right-eye image, proofread and correct according to this left-eye images and right-eye image between difference on brightness and the colourity, the stereopsis that is complementary with the generation color.Below promptly the arrange in pairs or groups various elements of stereo imaging system 100 of Fig. 1, the detailed step of present embodiment method is described:
Utilize left camera lens 110 and right camera lens 120 to take left-eye images and right-eye image (step S610) at first, respectively.Then, analyze left-eye images and right-eye image by processing unit 130, to find out left eye superimposed image overlapped in left-eye images and the right-eye image and right eye superimposed image (step S620) respectively.The detailed content of above step S610～S620 and the step S210 of previous embodiment～S220 are same or similar, so repeat no more at this.
Different with previous embodiment is; Present embodiment is after finding out left eye superimposed image and right eye superimposed image; Calculate red, green, blue (RGB) chromatic component (step S630) of left eye superimposed image and right eye superimposed image respectively by processing unit 130; And adjust the red, green, blue colourity of whole left-eye images and right-eye image in view of the above respectively, make the red, green, blue colourity consistent (step S640) of left eye superimposed image and right eye superimposed image.Then adjusted left-eye images and right-eye image are exported as stereopsis (step S650) at last.
For instance, suppose that following data are red (R), green (G) of the right and left eyes image that calculated of processing unit 130, the mean value and the standard deviation of blue (B) colourity:
Left-eye images (R): mean value 144.8, standard deviation 53;
Left-eye images (G): mean value 98, standard deviation 45;
Left-eye images (B): mean value 53, standard deviation 37;
Right-eye image (R): mean value 137, standard deviation 50;
Right-eye image (G): mean value 92.7, standard deviation 43;
Right-eye image (B): mean value 61.9, standard deviation 43.
The distribution of color that can be known right and left eyes image both sides by above-mentioned data is inconsistent.Suppose processing unit 130 be with two images on average be used as benchmark adjustment, if the mean value of the reference images of newly calculating is X_u, standard deviation is X_std; The mean value of right and left eyes image to be adjusted is that M_u, standard deviation are M_std, is the pixel of M for original pixel value in the right and left eyes image then, and the relational expression of its adjusted pixel value Y and aforementioned parameters is following:
Y＝(M-M_u)×X_std/M_std+X_u
In sum; Stereopsis production method of the present invention and stereo imaging system are through the COLOR COMPOSITION THROUGH DISTRIBUTION of image on the different color space in the overlapping region of analyzing the right and left eyes image; Adjust the brightness or the colourity of whole right and left eyes image according to this; Make the brightness and the color of two images reach consistent, and can effectively improve the quality of stereopsis.
Though the present invention discloses as above with embodiment; But it is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; Can change arbitrarily or be equal to replacement, so protection scope of the present invention should be as the criterion with the scope that the application's claim is defined.
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| CN103472668A (en) * | 2013-09-24 | 2013-12-25 | 东北大学 | Stereo imaging device and method |
| CN108924530A (en) * | 2017-03-31 | 2018-11-30 | 深圳市易快来科技股份有限公司 | A kind of 3D shoots method, apparatus and the mobile terminal of abnormal image correction |
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| CN108924530A (en) * | 2017-03-31 | 2018-11-30 | 深圳市易快来科技股份有限公司 | A kind of 3D shoots method, apparatus and the mobile terminal of abnormal image correction |
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