CN102055992A - Stereoscopic image forming method and relevant display module - Google Patents
Stereoscopic image forming method and relevant display module Download PDFInfo
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- CN102055992A CN102055992A CN2009102099330A CN200910209933A CN102055992A CN 102055992 A CN102055992 A CN 102055992A CN 2009102099330 A CN2009102099330 A CN 2009102099330A CN 200910209933 A CN200910209933 A CN 200910209933A CN 102055992 A CN102055992 A CN 102055992A
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Abstract
The invention relates to an image forming method. The method comprises the following steps of: inputting a color image; converting the color image into a first gray scale image; reducing the first brightness range of the first gray scale image into a second brightness range; generating a first gray scale gradient image corresponding to the space distribution of the first gray scale image according to the first brightness range and the second brightness range; superimposing the first gray scale image with the second brightness range and the gray scale gradient image to generate a second gray scale image; generating a translation image according to the second gray scale image and the color image; and forming a stereoscopic image according to the color image and the translation image.
Description
Technical field
The invention relates to a kind of image formation method and the relevant module that shows thereof, refer to a kind of method and relevant module that shows thereof that forms stereopsis especially.
Background technology
Generally speaking, the operation principle of stereopsis promptly is that the image that image that left eye is seen and right eye are seen is sent to left eye and right eye respectively, by the angle difference at right and left eyes visual angle, and make the received image of right and left eyes in user's brain, coincide to having a stereopsis of the depth of field and stereovision.The at present common stereopsis generation method that is used for allowing right and left eyes see and has the image of different parallaxes has polaroid glasses (Polarizing glasses), shutter stereo to show modes such as glasses (Shutter Glasses), red green (indigo plant) stereo display glasses (anaglyph) and the stereo display of bore hole formula.
No matter but adopt which kind of stereopsis generating mode to present, it produces the different message gimmick of right and left eyes all is similar, in general all be just must have earlier at signal of video signal itself to give the different image of right and left eyes respectively, wherein a kind of common mode is to utilize the depth map of corresponding chromatic image to calculate the relative translation amount of each pixel on the chromatic image, and then produce the not corresponding right and left eyes of multicomponent and have the chromatic image of different translational movements, yet the generating mode that is used for producing corresponding depth map at present often has calculation complexity or the wrong problem of depth map acquisition, for instance, it in U.S. Pat 20060232666 open motion vector according to last and present picture, brightness or color value are to carry out the edge detection of object in the image, utilize the edge detection result to produce depth map again, the wrong problem of profile acquisition takes place at the detecting object in right this kind method often, causes producing the depth map of distortion and the quality that influences stereopsis.In addition, another kind of common mode then is to utilize relevant mapping software (as Photoshop) to make depth map in mode manually, though the depth map that utilizes this kind mode to be drawn has higher accuracy, right depth map manufacturing process is time and effort consuming often.
Summary of the invention
Therefore, the present invention provides a kind of method and relevant module that shows thereof that forms stereopsis, uses solving the above problems.
The present invention provides a kind of method that forms stereopsis, includes input one chromatic image; Convert this chromatic image to one first grey-tone image; Reduce one first brightness range to, second brightness range of this first grey-tone image; Produce a GTG gradient image according to this first brightness range and this second brightness range to spatial distribution that should first grey-tone image; Coincide this first grey-tone image with this second brightness range and this GTG gradient image to produce one second grey-tone image; Produce a translation image according to this second grey-tone image and this chromatic image; And form a stereopsis according to this chromatic image and this translation image.
The present invention also provides a kind of demonstration module that is used for showing stereopsis, and it includes an input unit, and it is to be used for importing a chromatic image; One GTG converting unit, it is to be used for converting this chromatic image to one first grey-tone image; One brightness processed unit, it is one first brightness range to, second brightness range that is used for reducing this first grey-tone image; One grey-tone image generation unit, it is to be used for producing a GTG gradient image to spatial distribution that should first grey-tone image according to this first brightness range and this second brightness range, and be used for coinciding this first grey-tone image with this second brightness range and this GTG gradient image are to produce one second grey-tone image; One translation image generation unit, it is to be used for producing a translation image according to this second grey-tone image and this chromatic image; And a display unit, it is to be used for showing a stereopsis according to this chromatic image and this translation image.
Description of drawings
Fig. 1 shows the function block schematic diagram of module for preferred embodiment of the present invention.
Fig. 2 is the flow chart that demonstration module shown in Figure 1 forms the method for stereopsis.
Embodiment
In the middle of specification and aforesaid claim scope, used some vocabulary to censure specific assembly.The person with usual knowledge in their respective areas should understand, and same assembly may be called with different nouns by manufacturer.This specification and aforesaid claim scope are not used as distinguishing the mode of assembly with the difference of title, but the benchmark that is used as distinguishing with the difference of assembly on function.Be to be an open term mentioned " comprising " in the middle of specification and the aforesaid claim in the whole text, so should be construed to " comprise but be not limited to ".
See also Fig. 1, it is the function block schematic diagram that a preferred embodiment of the present invention one shows module 10.As shown in Figure 1, show that module 10 includes an input unit 12, a GTG converting unit 14, a brightness processed unit 16, a grey-tone image generation unit 18, a translation image generation unit 20, and a display unit 22; Input unit 12 is to be used for importing a chromatic image, in the present invention, input unit 12 is preferably to be general common signal of video signal input terminal, as RGB analog input terminal, YPbPr aberration input terminal, high resolution multimedia interface (High Definition Multimedia Interface, HDMI) terminal etc.; GTG converting unit 14 is to be used for converting this chromatic image to one first grey-tone image; Brightness processed unit 16 is the brightness ranges that are used for reducing this first grey-tone image, and is used for comparing extension (Brightness Enhancement) at this first grey-tone image after the reduction brightness range; Grey-tone image generation unit 18 is GTG gradient images that are used for producing to spatial distribution that should first grey-tone image, and be used for coinciding this first grey-tone image and this GTG gradient image are to produce one second grey-tone image; Translation image generation unit 20 is to be used for producing a translation image according to this chromatic image of this second grey-tone image and input originally; Display unit 22 is to be used for showing a stereopsis according to this chromatic image and this translation image, and in the present invention, display unit 22 is preferably to be a LCD screen.
Then, see also Fig. 2, it is the flow chart that demonstration module 10 shown in Figure 1 forms the method for stereopsis, and its method includes the following step.
Step 200: input unit 12 these chromatic images of input;
Step 202: GTG converting unit 14 converts this chromatic image to this first grey-tone image;
Step 204: brightness processed unit 16 compares extension at this first grey-tone image;
Step 206: brightness processed unit 16 is reduced to one second brightness range with one first brightness range of this first grey-tone image;
Step 208: grey-tone image generation unit 18 produces this GTG gradient image to spatial distribution that should first grey-tone image according to this first brightness range and this second brightness range;
Step 210: grey-tone image generation unit 18 coincides and carried out contrast and uphold and have this first grey-tone image of this second brightness range and this GTG gradient image to produce this second grey-tone image;
Step 212: translation image generation unit 20 produces this translation image according to this second grey-tone image and this chromatic image;
Step 214: display unit 22 shows this stereopsis according to this chromatic image and this translation image.
In this at being described in detail at above-mentioned step respectively.At first, by step 200 and step 202 as can be known, after utilizing input unit 12 these chromatic images of input, this chromatic image that input unit 12 can will receive is sent to GTG converting unit 14, then GTG converting unit 14 can begin to carry out the GTG conversion of this chromatic image, the conversion method that adopt in this place is to can be common GTG transfer algorithm at present, for instance, GTG converting unit 14 can be earlier at the R value of each pixel in this chromatic image, G value and the addition of B value are averaged to produce a mean value, then a brightness value of corresponding pixel will be set at through each mean value of computing gained again, so this chromatic image corresponding this first grey-tone image can be converted to; Or, GTG converting unit 14 can be judged maximum in R value, G value and the B value of each pixel and minimum value earlier and both additions are averaged to produce a mean value, at last will be set at a brightness value of corresponding pixel through each mean value of computing gained again, so also this chromatic image can be converted to corresponding this first grey-tone image; In other words, in the prior art so long as the conversion method that is used for converting chromatic image to grey-tone image all applicable among the present invention,, look closely the practical application that shows module 10 and decide as for adopting which kind of conversion method.
After converting this chromatic image to this first grey-tone image, brightness processed unit 16 promptly can be that the image basis compares the step (step 204) of extension and the step (step 206) of reduction brightness range in regular turn through this first grey-tone image after 14 conversions of GTG converting unit.Aspect the contrast extension, for instance, brightness processed unit 16 is brightness value in the pixel of this first grey-tone image all can be set at 0 less than the brightness value of 64 pixel, and brightness value all is set at 192 greater than the brightness value of 192 pixel, as for the pixel of brightness value between 64 to 192, then its brightness value can be deducted and multiply by one after 64 again greater than 1 particular value (as 2), thus, after the step of upholding through above-mentioned contrast, can reach and enlarge the effect that the brightness between each pixel changes relatively in this first grey-tone image, in addition, the contrast extension method that this step adopted is to be not limited to said method, for instance, it also can contrast extension dynamically at Luminance Distribution sections different in this first grey-tone image, because it is to be method common in the prior art, so its associated description repeats no more in this; And aspect the reduction brightness range, brightness processed unit 16 be can with the original brightness scope of this first grey-tone image divided by one greater than a particular value of 1 to produce corresponding this second brightness range, for instance, suppose that this particular value equals 4 and the original brightness scope of this first grey-tone image is the brightness range for 0 to 255, then brightness processed unit 16 will be with the brightness value of each pixel in this first grey-tone image divided by 4, so that the brightness range of this first grey-tone image tapers to 0 to 63 brightness range (can be considered this second brightness range) from originally 0 to 255 brightness range (can be considered this first brightness range), use and reach the purpose that brightness range changes.
After utilizing brightness processed unit 16 to enlarge that the brightness between each pixel in these first grey-tone images changes relatively and this first brightness range of this first grey-tone image be reduced to this second brightness range; then grey-tone image generation unit 18 can subtract each other the result according to one of this first brightness range and this second brightness range and produces corresponding this GTG gradient image (step 208); describe with the above-mentioned basis that is exemplified as; from the above; this first brightness range be for 0 to 255 brightness range and this second brightness range be brightness range for 0 to 63; then after being subtracted each other, this first brightness range and this second brightness range can obtain 0 to 192 brightness range; then grey-tone image generation unit 18 can produce this GTG gradient image with brightness range of 0 to 192 accordingly; under normal circumstances; it is to be directly proportional with pairing space length distance in the image that brightness in the image changes; meaning i.e. distance is far away more; brightness value is more little; and the pixel of image bottom can be regarded as the nearest relatively pixel of distance usually; event is big more the closer to the brightness value of the pixel of this image bottom; otherwise; brightness value away from the pixel of this image bottom then is more little more; therefore, this GTG gradient image is to be set at the gradient image that brightness is successively decreased and changed to the image top from the image bottom.In addition, it should be noted that this GTG gradient image is the spatial distribution of simultaneously corresponding this first grey-tone image of meeting, that is to say, pairing resolution is to equal pairing resolution in this first grey-tone image in this GTG gradient image, in order to coincide the carrying out of step of follow-up image.
Next, after producing this GTG gradient image, grey-tone image generation unit 18 can begin to carry out the step that image coincides, just step 210.In step 210, grey-tone image generation unit 18 be can coincide carried out that contrast is upheld and this GTG gradient image of having this first grey-tone image of this second brightness range and having a complementary relatively brightness range to produce this second grey-tone image.Below continue to carry out the explanation that image coincides with the above-mentioned mentioned default of giving an example, from the above, this second brightness range is that the brightness range for 0 to 63 brightness range and this GTG gradient image is the brightness range for 0 to 192, then grey-tone image generation unit 18 will with in the brightness value of each pixel in this first grey-tone image and this GTG gradient image distinguish the added luminance of each corresponding pixel, to be set at a brightness value of corresponding pixel through each brightness value of addition gained again, so can produce this second grey-tone image that should chromatic image, wherein the brightness range of this second grey-tone image is the brightness range for 0 to 255.
Then, coincide this GTG gradient image and this first grey-tone image with after producing this second grey-tone image at grey-tone image generation unit 18, and translation image generation unit 20 just can produce corresponding this translation image (step 212) according to this second grey-tone image and this chromatic image.In step 212, because via the brightness value of each pixel in above-mentioned this second grey-tone image that step produced is the value of coinciding that can be considered the variable of the variable of image brilliance and image space, that is to say, this second grey-tone image is the depth map that can be considered the relative translation amount that is used for calculating each pixel on this chromatic image, therefore, translation image generation unit 20 is to produce at least one translation image according to this second grey-tone image and this chromatic image, wherein this translation image is to have an image translational movement with respect to this chromatic image, thus, this chromatic image and this translation image can constitute one group of corresponding respectively right and left eyes and have the image combination of different translational movements.
At last, after receiving this image combination, display unit 22 can form corresponding this stereopsis (step 214) according to this chromatic image and this translation image, the 3 D image display method that adopted of display unit 22 is to can be general common plane multitask type stereo display herein, it is the flat image that user's right and left eyes different visual angles is provided respectively on same display unit, then again by the characteristic of the persistence of vision, allow user's brain the flat image of different visual angles be coincided and cognitive stereopsis for having the depth of field and stereovision, this is the action principle of plane multitask type stereo display, and plane multitask type stereo display can be subdivided into spatial multiplexing (Spatial-multiplexed) or time multitask (Time-multiplexed) stereo display again.Aspect spatial multiplexing stereo display, it is in the image combination that shows similar above-mentioned this chromatic image more than a group and this translation image on the LCD screen simultaneously in the mode of image staggered (Interweaving), for instance, it is the image that the pixel of LCD screen can be divided into several odd pixel and even pixel, the odd pixel image is the image of corresponding user's a glance, the even pixel image then is another a image of corresponding user, then utilize lens pillar (Lenticular Lens) with the light beam split again, and then the eyes that odd pixel image and even pixel image are projected to the user are respectively watched stereopsis for the user.Compared to spatial multiplexing stereo display, time multitask stereo display mode then is the control LCD screen projects to the user at the right-eye image of naming a person for a particular job sometime a right eye, and at next time point, it then is the left eye that left-eye images is projected to the user, when the image switch speed that is projected to right and left eyes is enough fast, user's brain will can not experienced the switching of image because of persistence of vision effect, and then the image that eyes are watched coincided is stereopsis.In sum, in step 214, if display unit 22 adopts the staggered spatial multiplexing stereo display mode of image, the mode that just can the odevity pixel shows of display unit 22 and can under the display speed of per second 30 width of cloth images, show this chromatic image and this translation image then, and then allow user's right and left eyes see this chromatic image and this translation image separately, so the user can watch this stereopsis that is coincided and formed by chromatic image and this translation image.If display unit 22 adopts time multitask stereo display mode, then 22 of display units are to show this chromatic image and this translation image in regular turn alternately, and then allow user's right and left eyes see this chromatic image and this translation image separately, so the user can watch this stereopsis that is coincided and formed by this chromatic image and this translation image.In the present invention, display unit 22 is preferably to show simultaneously that in the staggered mode of image two groups of image combinations of being made up of this chromatic image and corresponding translation image are to form this stereopsis.
What deserves to be mentioned is, above-mentioned steps 204 is to can be an omissible step, that is to say, after GTG converting unit 14 converts this chromatic image to this first grey-tone image, but brightness processed unit 16 skips steps 204 and the brightness range reduction step of this first grey-tone image of directly carrying out.In addition, from the above, the brightness value of each pixel is the value of coinciding that can be considered the variable of the variable of image brilliance and image space in this second grey-tone image, the brightness range of right this first grey-tone image and this GTG gradient image is the brightness range that can be not limited to the foregoing description, for instance, brightness processed unit 16 also can be with this first brightness range of this first grey-tone image divided by 2, so that this first grey-tone image has 0 to 127 brightness range, this GTG gradient image then changes to accordingly has 0 to 128 brightness range.In brief, as long as the brightness range maximum after this first grey-tone image and this GTG gradient image coincide is no more than 255, its brightness range of deriving changes the variation aspect that all belongs to method provided by the present invention.
In the making of depth map, often has the calculation complexity compared to prior art, the easy distortion of image, and the problem of process time and effort consuming, the present invention utilizes above-mentioned GTG conversion, the step that brightness range changes and image coincides produces the gray scale depth figure of corresponding chromatic image, thus, see through above-mentioned easy algorithm steps, not only can reduce the Production Time of depth map significantly, simultaneously because the brightness value of the gray scale depth figure that gets through the above-mentioned steps processing is the value of coinciding that can be considered the variable of the variable of image brilliance and image space, therefore the correctness of its depth information that provides can be provided, avoiding the problem of depth map distortion, and then promote the quality of stereopsis widely.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. a method that forms stereopsis is characterized in that, includes:
Import a chromatic image;
Convert this chromatic image to one first grey-tone image;
Reduce one first brightness range to, second brightness range of this first grey-tone image;
Produce a GTG gradient image according to this first brightness range and this second brightness range to spatial distribution that should first grey-tone image;
Coincide this first grey-tone image with this second brightness range and this GTG gradient image to produce one second grey-tone image;
Produce a translation image according to this second grey-tone image and this chromatic image; And
Form a stereopsis according to this chromatic image and this translation image.
2. the method for claim 1 is characterized in that, converts this chromatic image to this first grey-tone image and includes:
One mean value of R value, G value and the B value of each pixel in this chromatic image is set at a brightness value of this pixel.
3. the method for claim 1 is characterized in that, this first brightness range to this second brightness range of reducing this first grey-tone image includes:
With this first brightness range of this first grey-tone image divided by greater than a particular value of 1, to produce this second brightness range.
4. the method for claim 1 is characterized in that, this GTG gradient image that produces spatial distribution that should first grey-tone image according to this first brightness range and this second brightness range includes:
Subtract each other the result according to one of this first brightness range and this second brightness range and produce this GTG gradient image spatial distribution that should first grey-tone image.
5. the method for claim 1 is characterized in that, this GTG gradient image that produces spatial distribution that should first grey-tone image according to this first brightness range and this second brightness range includes:
Produce this GTG gradient image that successively decreases to the image top and change in brightness self imaging bottom according to this first brightness range and this second brightness range.
6. the method for claim 1 is characterized in that, also includes:
Compare extension at this first grey-tone image.
7. a demonstration module that is used for showing stereopsis is characterized in that, includes:
One input unit, it is used for importing a chromatic image;
One GTG converting unit, it is used for converting this chromatic image to one first grey-tone image;
One brightness processed unit, it is used for reducing one first brightness range to, second brightness range of this first grey-tone image;
One grey-tone image generation unit, it is used for producing a GTG gradient image to spatial distribution that should first grey-tone image according to this first brightness range and this second brightness range, and be used for coinciding this first grey-tone image with this second brightness range and this GTG gradient image are to produce one second grey-tone image;
One translation image generation unit, it is used for producing a translation image according to this second grey-tone image and this chromatic image; And
One display unit, it is used for showing a stereopsis according to this chromatic image and this translation image.
8. demonstration module as claimed in claim 7 is characterized in that, this display unit is a liquid crystal screen.
9. demonstration module as claimed in claim 7 is characterized in that this input unit is to be a signal of video signal input terminal.
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| JP4061305B2 (en) * | 2002-08-20 | 2008-03-19 | 一成 江良 | Method and apparatus for creating stereoscopic image |
| GB0323281D0 (en) * | 2003-10-04 | 2003-11-05 | Koninkl Philips Electronics Nv | Improving grey scale contrast in a 3D image display device |
| CN101237590B (en) * | 2007-02-01 | 2010-05-19 | 广达电脑股份有限公司 | 3D image display method |
| CN101557534B (en) * | 2009-05-19 | 2010-09-01 | 无锡景象数字技术有限公司 | Method for generating disparity map from video close frames |
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