CN101902582A - Method and device for adding stereoscopic video subtitle - Google Patents
Method and device for adding stereoscopic video subtitle Download PDFInfo
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Abstract
The invention provides a method for adding a stereoscopic video subtitle, comprising the following steps: reading in a multi-view stereoscopic image and a subtitle image and loading the subtitle position and subtitle parallax quantity of the subtitle image; calculating the offset in each visual angle of the subtitle image and the position of the offset subtitle image according to the parallax quantity; and covering the subtitle image to each visual angle of the multi-view stereoscopic image according to the position of the offset subtitle image. The invention also provides a device for adding the stereoscopic video subtitle, comprising a subtitle image input module, a stereoscopic image input module, a stereoscopic parameter input module, a subtitle position matrixing module, a subtitle image synthesis module and a recording medium read-in module. According to the method and the device for adding the stereoscopic video subtitle, the subtitle image is added onto each visual angle image, and the stereoscopic effect of the subtitle can be realized by regulating the parallax quantity of the subtitle image in different viewpoints. The method of the invention is suitable for dual-view stereoscopic images and multi-view stereoscopic display images.
Description
Technical field
The present invention relates to technical field of computer multimedia, particularly a kind of stereoscopic video subtitle adding method and device.
Background technology
Three-dimensional video-frequency is subjected to popular liking with the true stereo sense of its scene, is also paid attention to by TV, film, advertising sector.The general raster image technology that refers to of stereo-picture simply says to be exactly media--the technology of realization 3 D stereo or animation effect on the grating material on a kind of plane.Stereo technology is as a kind of novel figure chip technology, almost can be described as revolutionary breakthrough with respect to traditional plane graph chip technology, the application of stereo technology is very extensive, such as card card manufacturing industry, advertising, video display, physical culture, recreation, fashionable dress, press etc., stereo technology can be used in every field that can relate to image applications.Human physiology stereoscopic vision key element is, the right and left eyes imaging has the displacement on the horizontal direction, i.e. parallax when watching same object.Parallax is exactly to observe the direction difference that same target produced from two points that certain distance is arranged.See two angles between the point from target, be called the parallax of these two points, the distance between 2 is called baseline.As long as know the parallax angle and the length of base, just can calculate the distance between target and the observer.This parallax can produce third dimension in brain.The three-dimensional video-frequency technology allows spectators' right and left eyes see different video images respectively based on this principle by the optical technology means, makes it produce three-dimensional sensation.
It is different with plane picture to add captions in stereo-picture.In stereo-picture, add captions, need in the image of each viewpoint, add caption information.If adopt conventional planar image captions adding method, captions lack third dimension in scene, can influence the stereo-picture appreciation effect greatly, watch for a long time even can cause spectators' discomfort.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, and special in adjusting the water parallax size of captions in different points of view, the appreciation effect of lifting stereo-picture has proposed a kind of stereoscopic video subtitle adding method and device.
For achieving the above object, the one side of the embodiment of the invention discloses a kind of stereoscopic video subtitle adding method, may further comprise the steps:
Read in multi-viewpoint stereo image and captions image, and be written into the subtitle position and the captions parallax amount of described captions image;
Calculate the side-play amount of described captions image captions in each visual angle and the position after the skew according to described parallax amount; With
According to the position after the described skew, described captions image is covered each visual angle of described multi-viewpoint stereo image.
The embodiment of the invention a kind of stereoscopic video subtitle adding set disclosed on the other hand, comprise captions image input module, stereo-picture input module, steric parameter input module, subtitle position conversion module, captions image synthesis unit and recording medium writing module.
Wherein, the captions image reads in module, is used to read in the captions image;
Stereo-picture reads in module, is used to read in multi-viewpoint stereo image, and the visual angle information of number of described multi-viewpoint stereo image is provided;
Steric parameter reads in module, is used to read in the subtitle position and the parallax amount of captions image;
Subtitle position conversion module is used for calculating the side-play amount of described captions image captions in each visual angle and the position after the skew according to the subtitle position, parallax amount of reading in the captions image of module from described steric parameter with from the visual angle number that described stereo-picture reads in module;
The captions image synthesis unit is used for described captions image being added to each visual angle of described multi-viewpoint stereo image according to the position after the skew of described captions image captions in each visual angle;
The recording medium writing module, be used for from the interpolation of described captions image synthesis unit the stereo-picture of captions image record storage medium.
Stereoscopic video subtitle adding method and device according to the embodiment of the invention have the following advantages:
1) can make the captions image in stereo-picture, have certain depth effect, strengthen the appreciation effect of stereo-picture greatly.
2) can change the degree of depth of captions in scene according to user's request, convenient its stereoeffect of adjusting.
3) support various stereoscopic display devices, applicability is strong.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the FB(flow block) according to the stereoscopic video subtitle adding method of the embodiment of the invention;
Fig. 2 is the implementing procedure figure of Fig. 1 neutral body video caption adding method;
Fig. 3 is the structured flowchart according to the stereoscopic video subtitle adding set of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter parts and the setting to specific examples is described.Certainly, they only are example, and purpose does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between various embodiment that discuss of institute and/or the setting.In addition, various specific technology and the examples of material that the invention provides, but those of ordinary skills can recognize the property of can be applicable to of other technologies and/or the use of other materials.In addition, first feature described below second feature it " on " structure can comprise that first and second features form the embodiment of direct contact, can comprise that also additional features is formed on the embodiment between first and second features, such first and second features may not be direct contacts.
For realizing the present invention's purpose, the invention discloses a kind of stereoscopic video subtitle adding method.Fig. 1 shows the FB(flow block) of this stereoscopic video subtitle adding method.As shown in Figure 1, this method comprises the steps:
S101: read in multi-viewpoint stereo image and captions image, and be written into the subtitle position and the captions parallax amount of captions image;
At first, read in multi-viewpoint stereo image and captions image.Wherein, the source of captions image comprises one of following dual mode:
1) the captions image of directly being imported by the external world obtains, as adopting handwriting input device, scanning device etc.;
2) being converted into corresponding captions image by the non-captions image information that will import obtains.
Be located in the multi-viewpoint stereo image that has read in, the visual angle number is N.To each visual angle picture number, number consecutively is visual angle 1,2...... visual angle, visual angle N from left to right, and N is a positive integer.
Wherein, in this multi-viewpoint stereo image each pixel information according to every row from left to right, each the row end to end sequential storage in storage medium.
And the captions image that has read in comprises background content and font content.
In conjunction with shown in Figure 2, read in multi-viewpoint stereo image and captions image after, be written into the subtitle position and the captions parallax amount of captions image.
Specifically, in order to locate the relative position of whole captions image in stereo-picture, the coordinate of choosing the relative display of captions image is as subtitle position.Wherein, this subtitle position can be chosen the coordinate of arbitrary position, as upper left corner coordinate, upper right corner coordinate, centre coordinate, lower left corner coordinate or lower right corner coordinate.Certainly, other positions of choosing relative display also belong to the protection range of the embodiment of the invention as subtitle position.
In the present embodiment, choose captions image top left corner pixel in the position of stereo-picture as subtitle position.If this position is capable at the several from the top down y of stereo-picture, several from left to right x row.
After being written into subtitle position, further be written into the parallax amount U of captions, i.e. captions parallax size.Wherein, the parallax size is every visual angle m pixel.
In the present embodiment, parallax amount U represents by pixel quantity.In addition, parallax amount can also then according to the screen size of display and the size of every pixel, converse the quantity of translation pixel by the distance of input parallax.
S102: calculate the side-play amount of captions image captions in each visual angle and the position after the skew according to parallax amount;
According to the parallax amount U that is written in the step 101, calculate the side-play amount of captions image captions in each visual angle, comprise one of following dual mode:
When 1) being odd number as if the visual angle number N, to a certain visual angle that is numbered n, its side-play amount is Mn=(n-(N+1)/a 2) * m pixel;
If the visual angle number N is an even number, then be numbered the visual angle of n, its side-play amount is Mn=(n-(N/2+1)) * m pixel.
2) be written into the parallax amount U of captions image high order end image and low order end image, then be converted on each visual angle, its captions are Mn=U/N with respect to the side-play amount at a last visual angle.
Therefore, be numbered the visual angle of n, the position after its captions image top left corner pixel skew is that y is capable, the x+Mn row.
Specifically, when side-play amount Mn greater than 0 the time, the captions image is offset to the right; When side-play amount Mn less than 0 the time, the captions image is offset left.
S103:, the captions image is covered each visual angle of multi-viewpoint stereo image according to the position after the skew.
To each visual angle image, the aligned in position with after obtaining being offset in captions image top left corner pixel and the step 102 is filled into the captions image pixel in this visual angle image.
Wherein, the captions image pixel be filled in this visual angle image comprise:
If this pixel is a background parts in the captions image, then do not operate; If this pixel is a captions image font part, then with the Pixel Information on the image of the alternative visual angle of this Pixel Information.
Above-mentioned steps is carried out at each visual angle in the multi-viewpoint stereo image, calculated the position of captions image in each visual angle, the captions image is filled according to correspondence position on each visual angle.
The embodiment of the invention also discloses a kind of stereoscopic video subtitle adding set.Fig. 3 shows the structured flowchart of this stereoscopic video subtitle adding set.In conjunction with shown in Figure 3, this device 100 comprises that the captions image reads in that module 110, stereo-picture are read in module 120, steric parameter reads in module 130, subtitle position conversion module 140, captions image synthesis unit 150 and recording medium writing module 160.
Specifically, the captions image reads in module 110, is used to read in the captions image.Wherein, the source of captions image comprises one of following dual mode:
1) the captions image of directly being imported by the external world obtains, as adopting handwriting input device, scanning device etc.;
2) being converted into corresponding captions image by the non-captions image information that will import obtains.At this moment, stereoscopic video subtitle adding set 100 further comprises captions image generation module 170.As shown in Figure 3, captions image generation module 170 comprises that text reads in unit 171 and font control unit 172.
Specifically, text reads in unit 171 and reads in non-captions image information, and this information is converted into corresponding captions image.The variable information of the above-mentioned character image of font control unit 172 controls.Wherein, variable information comprises the information such as font, character amount of character image.
Stereo-picture reads in module 120 and reads in multi-viewpoint stereo image, and the visual angle information of number of multi-viewpoint stereo image is provided.
Be located in this multi-viewpoint stereo image, the visual angle number is N.To each visual angle picture number, number consecutively is visual angle 1,2...... visual angle, visual angle N from left to right, and N is a positive integer.
Wherein, in this multi-viewpoint stereo image each pixel information according to every row from left to right, each the row end to end sequential storage in storage medium.
And the captions image that has read in comprises background content and font content.
In conjunction with shown in Figure 2, read in multi-viewpoint stereo image and captions image after, steric parameter reads in subtitle position and the captions parallax amount that module 130 is written into the captions image.
Specifically, in order to locate the relative position of whole captions image in stereo-picture, the coordinate of choosing the relative display of captions image is as subtitle position.Wherein, this subtitle position can be chosen the coordinate of arbitrary position, as upper left corner coordinate, upper right corner coordinate, centre coordinate, lower left corner coordinate or lower right corner coordinate.Certainly, other positions of choosing relative display also belong to the protection range of the embodiment of the invention as subtitle position.
In the present embodiment, choose captions image top left corner pixel in the position of stereo-picture as subtitle position.If this position is capable at the several from the top down y of stereo-picture, several from left to right x row.
After being written into subtitle position, further be written into the parallax amount U of captions, i.e. captions parallax size.Wherein, the parallax size is every visual angle m pixel.
In the present embodiment, parallax amount U represents by pixel quantity.In addition, parallax amount can also then according to the screen size of display and the size of every pixel, converse the quantity of translation pixel by the distance of input parallax.
Subtitle position conversion module 140 is used for reading in the visual angle number of module 120 according to the subtitle position, parallax amount of reading in the captions image of module 130 from steric parameter with from stereo-picture, calculates the side-play amount of captions image captions in each visual angle and the position after the skew.
Subtitle position conversion module 140 is calculated the side-play amount of captions image captions in each visual angle, comprises one of following dual mode:
When 1) being odd number as if the visual angle number N, to a certain visual angle that is numbered n, its side-play amount is Mn=(n-(N+1)/a 2) * m pixel;
If the visual angle number N is an even number, then be numbered the visual angle of n, its side-play amount is Mn=(n-(N/2+1)) * m pixel.
2) be written into the parallax amount U of captions image high order end image and low order end image, then be converted on each visual angle, its captions are Mn=U/N with respect to the side-play amount at a last visual angle.
Therefore, be numbered the visual angle of n, the position after its captions image top left corner pixel skew is that y is capable, the x+Mn row.
Specifically, when side-play amount Mn greater than 0 the time, the captions image is offset to the right; When side-play amount Mn less than 0 the time, the captions image is offset left.
Captions image synthesis unit 150 is used for the captions image being added to each visual angle of multi-viewpoint stereo image according to from the position after the skew of subtitle position conversion module 140.
To each visual angle image, captions image synthesis unit 150 is filled into the aligned in position after obtaining being offset in captions image top left corner pixel and the subtitle position conversion module 140 in this visual angle image with the captions image pixel.
Wherein, captions image synthesis unit 150 is filled into the captions image pixel in this visual angle image and comprises:
If this pixel is a background parts in the captions image, then do not operate; If this pixel is a captions image font part, then with the Pixel Information on the image of the alternative visual angle of this Pixel Information.
Above-mentioned steps is carried out at each visual angle in the multi-viewpoint stereo image, calculated the position of captions image in each visual angle, the captions image is filled according to correspondence position on each visual angle.
Stereoscopic video subtitle adding set 100 further comprises recording medium writing module 160, be used for from the interpolation of captions image synthesis unit 150 the stereo-picture of captions image record storage medium.
Stereoscopic video subtitle adding method that the embodiment of the invention provides and device both be applicable to and also be applicable to the multi-eye stereo display image by binocular stereo image.By adjusting the horizontal displacement size of captions in different points of view, promptly the parallax size can make captions have certain degree of depth in scene, has promoted the appreciation effect of stereo-picture greatly.And can change the degree of depth of captions in scene according to user's request, convenient its stereoeffect of adjusting.Support various stereoscopic display devices, applicability is strong.This method can realize by software or hardware specifically, can be applicable to three-dimensional video-frequency, three-dimensional film Play System, or in the stereo-picture process software.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (13)
1. a stereoscopic video subtitle adding method is characterized in that, may further comprise the steps:
Read in multi-viewpoint stereo image and captions image, and be written into the subtitle position and the captions parallax amount of described captions image;
Calculate the side-play amount of described captions image captions in each visual angle and the position after the skew according to described parallax amount; With
According to the position after the described skew, described captions image is added to each visual angle of described multi-viewpoint stereo image.
2. the method for claim 1 is characterized in that, the described captions image that reads in comprises the information of will read in, and is converted into the captions image of this information, and the variable information of the described captions image of may command.
3. the method for claim 1 is characterized in that, each pixel information of described multi-viewpoint stereo image according to every row from left to right, each the row end to end sequential storage in storage medium.
4. the method for claim 1 is characterized in that, described multi-viewpoint stereo image comprises N visual angle, and N is a positive integer,
When visual angle N was odd number, the side-play amount at n visual angle was Mn=(n-(N+1)/a 2) * m pixel;
When visual angle N was even number, the side-play amount at n visual angle was Mn=(n-(N/2+1)) * m pixel, wherein,
Mn is the side-play amount at n visual angle, and parallax amount is each visual angle m pixel.
5. as right 1 described method, it is characterized in that described each visual angle that the captions image is covered described multi-viewpoint stereo image further comprises:
To each visual angle, the aligned in position with after pixel on the described subtitle position and the described skew is filled into the captions image pixel in this visual angle.
6. method as claimed in claim 5 is characterized in that the pixel on described subtitle position is the background content of described captions image, does not then operate; Pixel on described subtitle position is the font content of described captions image, then with the Pixel Information on the image of the alternative visual angle of this Pixel Information.
7. a stereoscopic video subtitle adding set is characterized in that, comprises that the captions image reads in that module, stereo-picture are read in module, steric parameter reads in module, subtitle position conversion module, captions image synthesis unit and recording medium writing module,
Described captions image reads in module, is used to read in the captions image;
Described stereo-picture reads in module, is used to read in multi-viewpoint stereo image, and the visual angle information of number of described multi-viewpoint stereo image is provided;
Described steric parameter reads in module, is used to read in the subtitle position and the parallax amount of captions image;
Described subtitle position conversion module is used for calculating the side-play amount of described captions image captions in each visual angle and the position after the skew according to the subtitle position, parallax amount of reading in the captions image of module from described steric parameter with from the visual angle number that described stereo-picture reads in module;
Described captions image synthesis unit is used for described captions image being added to each visual angle of described multi-viewpoint stereo image according to the position after the skew of described captions image captions in each visual angle;
Described recording medium writing module, be used for from the interpolation of described captions image synthesis unit the stereo-picture of captions image record storage medium.
8. device as claimed in claim 7 is characterized in that, described stereoscopic video subtitle adding set further comprises captions image generation module,
Described captions image generation module, be used to the information of reading in, be converted into the captions image of this information, and the variable information of the described captions image of may command, described captions image is sent to described captions image read in module, described variable information comprises the font and the character amount of described character image.
9. device as claimed in claim 8 is characterized in that, described captions image generation module comprises that text reads in unit and font control unit,
Described text reads in the unit, is used to the information of reading in, and is converted into the described captions image that reads in information;
Described font control unit is used to control the variable information that reads in the captions image of unit from described text.
10. device as claimed in claim 7 is characterized in that, described multi-viewpoint stereo image comprises N visual angle, and N is a positive integer
When visual angle N was odd number, the side-play amount at n visual angle was Mn=(n-(N+1)/a 2) * m pixel;
When visual angle N was even number, the side-play amount at n visual angle was Mn=(n-(N/2+1)) * m pixel, and wherein, Mn is the side-play amount at n visual angle, and parallax amount is each visual angle m pixel.
11. device as claimed in claim 7 is characterized in that, described captions image synthesis unit further comprises each visual angle that the captions image adds described multi-viewpoint stereo image to:
Described captions image synthesis unit is to each visual angle, and the aligned in position with after pixel on the described subtitle position and the described skew is filled into the captions image pixel in this visual angle.
12. device as claimed in claim 11 is characterized in that, the pixel on described subtitle position is the background content of described captions image, does not then operate; Pixel on described subtitle position is the font content of described captions image, then with the Pixel Information on the image of the alternative visual angle of this Pixel Information.
13. device as claimed in claim 7 is characterized in that, with each pixel information of described multi-viewpoint stereo image according to every row from left to right, the end to end sequential storage of each row is in storage medium.
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