CN102724443B - Method and system for transformation of scrolling mode of two-dimensional caption - Google Patents
Method and system for transformation of scrolling mode of two-dimensional caption Download PDFInfo
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- CN102724443B CN102724443B CN201110127377.XA CN201110127377A CN102724443B CN 102724443 B CN102724443 B CN 102724443B CN 201110127377 A CN201110127377 A CN 201110127377A CN 102724443 B CN102724443 B CN 102724443B
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- scrolling
- window
- caption
- region
- captions
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Abstract
The invention, which mainly relates to processing on a caption special effect in the broadcast television program manufacturing and broadcasting fields, discloses a method and system for transformation of a scrolling mode of a two-dimensional caption. The method comprises: (1), obtaining basic dimension parameters of an original caption window and transformation parameters; (2), according to the transformation parameters, carrying out caption window space reservation so as to determine a caption scanning window and extract parameters of the caption scanning window; (3), calculating a scrolling position according to a scrolling function f (x, y, t) in the caption scanning window and carrying out screen dividing based on the scrolling position; and (4), according to the screen dividing, carrying out rendering on each pixel point position. Moreover, the system consists of a caption window collection unit, a caption window space reservation unit, a screen dividing unit, and a rendering unit. According to the invention, the caption window space reservation is carried out to display an image exceeding the scrolling transformation part, so that problems of image distortion and missing of a scrolling transformation special effect during a playing process can be solved. And moreover, pixel superposition of a scrolling part enables a pixel of the scrolling part to be restored well and truly.
Description
Technical field
The present invention relates to the making of program captions and broadcast and correlative technology field, relate in particular to a kind of deformation method and system of scrolling mode of two-dimentional captions.
Background technology
In existing program making and broadcast and correlative technology field, in the process that program material is made, in order better word to be showed, need a large amount of captions to synthesize, particularly at large-scale 3D film, in material-making and broadcasting, in order to obtain better effect, usually need in captions, insert special effects, along with improving constantly that stunt is required, there is successively 3D effect captions stunt, 3D captions stunt needs a large amount of data to calculate in implementation procedure, and conventionally to calculate in a large number by the GPU of graphic display card, in order to obtain the picture of high-quality, to graphic operation processing speed, because calculating can relate to and call GPU function and therefore hardware is had to higher requirement, in the prior art, film titler is being made in 3D captions special efficacy, in playing process, good hardware and software environment is provided, and processing material processing speed is subject to the restriction of GPU disposal ability, and also there is same requirement in the time playing, in 3D captions building-up process, because processed a large amount of image image files, therefore file needs larger memory space and spatial cache.
Between above situation, realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems:
Make at 3D captions, in building-up process due to the jumbo memory space of needs and the speed of service fast, therefore having relatively high expectations to graphic display card and GPU, carrying out in simple special efficacy building-up process, cause the waste of system, simultaneously, also there is many-sided restriction such as the speed of service and disposal ability for playback equipment, give the making of 3D captions special efficacy and with for having carried out restriction.
Meanwhile, when realizing in the prior art scrolling mode again and being out of shape stunt, because the different directions of scrolling is therefore in the time that scrolling exceeds caption window indication range, the part exceeding can not be shown, thereby occur distortion, incomplete figure.
Summary of the invention
For deficiency of the prior art, the present invention is directed to the technical problem that will solve a kind of deformation method and system of scrolling mode of two-dimentional captions be provided, at film titler to 3D special efficacy caption making process, generate the mode such as scrolling special efficacy.
A deformation method for the scrolling mode of two-dimentional captions, step specifically comprises: 1) obtain the parameters of basic dimensions of former caption window, and deformation parameter; 2) according to deformation parameter, carry out caption window space to be preserved, thereby and determine captions scanning window, extract described captions scanning window parameter; 3), in described captions scanning window, according to scrolling function f (x, y, t), calculate scrolling position, and according to scrolling position, carry out screen divider; 4), according to described screen divider, each pixel position is played up;
Preferably, described step 1) described in parameters of basic dimensions comprise: former caption window length value X
0, former caption window width value Y
0; Described deformation parameter at least comprises: scrolling diameter, scrolling direction, scrolling starting point, initial line has scrolled., scrolling start angle, scrolling speed.
Preferably, described step 2) in specifically comprise: 21) according to scrolling diameter, scrolling direction, scrolling start angle determine caption window headspace; 22) determine captions scanning window according to described caption window headspace, and extract maximum length and width.
Preferably, described step 3) in specifically comprise: 31) in described captions scanning window, determine the physical location of scrolling region in described captions scanning window according to scrolling parameter, scrolling function f (x, y, t); 32) according to scrolling region described captions scanning window is divided into: crimp regions, scrolling region, do not roll up region.
Preferably, described step 4) in specifically comprise: 41) in described crimp regions, all pixel transparency attributes are all-transparent setting; 42), in described scrolling region, calculate in the region that scrolls; 43) do not roll up in region described, pixel all properties assignment is constant.
Preferably, described step 42) described in scrolling region calculate be specially: 42A) in A frame, pick up scrolling region in pixel (x
1, y
1), by described scrolling function f (x, y, t), according to: x
2=f
1(x
1, y
1), y
2=f
1(x
1, y
1), obtain the respective pixel value (x after distortion
2, y
2); 42B) in A+1 frame, pick up caption window pixel (x
n, y
n), change t value, by described scrolling function f (x, y, t), according to: x
n+1=f
n(x
n, y
n), y
n+1=f
n(x
n., y
n), obtain the respective pixel value (x after distortion
n+1, y
n+1).42C) judge whether to exist overlapping region according to curling parameter, if so, overlapping area pixel point is played up, otherwise, will not calculate.
Preferably, described step 42C) described in overlapping area pixel point is played up, specifically comprise: 42C1) according to the overlapping number of curling calculation of parameter overlapping region; 42C2) judge whether overlapping once number is odd number, if, the pixel in institute overlapping region is carried out after mirror image, carry out the calculating of respective pixel value by scrolling function f (x, y, t) again, otherwise, the pixel in institute overlapping region is directly carried out to the calculating of respective pixel value by scrolling function f (x, y, t); 42C3) in picture at same frame, carry out pixel rendering to all overlapping layers in overlapping region.
The anamorphotic system that the invention provides a kind of scrolling mode of two-dimentional captions, described system comprises: caption window collecting unit, caption window space to be preserved unit, screen divider unit, rendering unit; While starting scrolling distortion, described caption window collecting unit obtains the parameters of basic dimensions of former caption window, and deformation parameter, and above parameter is passed to caption window space to be preserved unit, described caption window space to be preserved unit is according to deformation parameter, carry out caption window space to be preserved, thereby and determine captions scanning window, extract described captions scanning window parameter; Described screen divider unit, in described captions scanning window, according to scrolling function f (x, y, t), calculates scrolling position, and according to scrolling position, carries out screen divider; Described rendering unit, according to described screen divider, is played up each pixel position.
Wherein, described caption window collecting unit, the parameters of basic dimensions of collection comprises: former caption window length value X
0, former caption window width value Y
0; Deformation parameter at least comprises: scrolling diameter, scrolling direction, scrolling starting point, initial line has scrolled., scrolling start angle, scrolling speed.
Wherein, caption window headspace is determined according to scrolling diameter, scrolling direction, scrolling start angle in described caption window space to be preserved unit; Determine captions scanning window according to described caption window headspace, and extract maximum length and width.
Wherein, the physical location of scrolling region in described captions scanning window, in described captions scanning window, determined according to scrolling parameter, scrolling function f (x, y, t) in described screen divider unit; According to scrolling region described captions scanning window is divided into: crimp regions, scrolling region, do not roll up region.
Wherein, described rendering unit also comprises scrolling zone rendering unit, for carrying out overlapping playing up, first, according to the overlapping number of curling calculation of parameter overlapping region; Afterwards, judge whether overlapping once number is odd number, if so, the pixel in institute overlapping region is carried out after mirror image, then by scrolling function f (x, y, t) carry out the calculating of respective pixel value, otherwise, the pixel in institute overlapping region is directly passed through to scrolling function f (x, y, t) carry out the calculating of respective pixel value; Finally, in picture at same frame, carry out pixel rendering to all overlapping layers in overlapping region.
Above technical scheme can find out, the present invention has the following advantages:
First, the present invention passes through caption window space to be preserved, thereby the image that exceeds scrolling distortion is shown, having solved image fault and the disappearance of scrolling distortion stunt in playing process.
Secondly, the present invention, by the pixel stack to scrolling part, has therefore better made reduction more really to the pixel of volume part.
Brief description of the drawings
Fig. 1 is the deformation method schematic diagram of the scrolling mode of a kind of two-dimentional captions of the present invention;
Fig. 2 is the inventive method the first embodiment schematic diagram;
Fig. 3 is the anamorphotic system schematic diagram of the scrolling mode of a kind of two-dimentional captions of the present invention;
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is carried out to clear, complete description; obvious described embodiment is only a part of embodiment of the present invention; not whole embodiment; based on the embodiment in the present invention; those of ordinary skill in the art, not paying the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-:
Refer to Fig. 1,2, the inventive method the first embodiment, the invention provides a kind of deformation method of scrolling mode of two-dimentional captions:
First, obtain parameters of basic dimensions and the deformation parameter of former caption window, wherein parameters of basic dimensions comprises: former caption window length value X
0, former caption window width value Y
0; Described deformation parameter at least comprises: scrolling diameter, can be set as diameter or radius; Scrolling direction: be illustrated as to the right scrolling, scrolling starting point, initial line has scrolled, can be set as from some enlightenment scrolling, diagram figure is four angle points or since four limit scrollings, scrolling start angle, can be set as being illustrated as 30 ° or other setting parameters arbitrarily angled, scrolling speed between 0～90 ° directly relevant with the broadcasting speed t of frame, the shape of this parameter and scrolling is irrelevant, but relevant with the result of broadcast of distortion;
Afterwards, pick up or input parameter according to above distortion, carry out caption window space to be preserved, thereby and determine captions scanning window, extract described captions scanning window parameter; Specifically can first determine the headspace that has more part of caption window according to scrolling diameter, scrolling direction, scrolling start angle; Finally, determine captions scanning window according to described caption window headspace, and extract maximum length and width.
Reserve after adjustment at caption window, in described captions scanning window, determine according to scrolling parameter, definite scrolling function f (x, y, t) physical location of region in described captions scanning window that scroll; According to scrolling region described captions scanning window is divided into: crimp regions (diagram: 1A), scrolling region (diagram: 1B), do not roll up region (diagram: 1C), and according to the screen divider of different caption windows, each pixel position is played up; Diagram: in 1A region, as put 14, all pixel transparency attributes are all-transparent setting; Diagram: in 1B region, as put 15, in described scrolling region, scroll region calculate, according to scrolling function carry out assignment, as in the first frame, pick up scrolling region in pixel (x
1, y
1), by described scrolling function f (x, y, t), according to: x
2=f
1(x
1, y
1), y
2=f
1(x
1, y
1), obtain the respective pixel value (x after distortion
2, y
2); In the second frame, pick up caption window pixel (x
2, y
2), change t value, by described scrolling function f (x, y, t), according to: x
3=f
2(x
2, y
2), y
3=f
2(x
2, y
2), obtain the respective pixel value (x after distortion
3, y
3), under normal circumstances, when being greater than, scrolling distance rolls up apart from being, will in scrolling interval, there is overlapping region, now need to judge whether to exist overlapping region according to curling parameter, and if so, overlapping area pixel point is played up, otherwise, will not calculate.
Overlapping area pixel point being carried out in render process to described, first, specifically comprise: the overlapping number that obtains overlapping region according to curling calculation of parameter, afterwards, judge whether overlapping once number is odd number, if so, the pixel in institute overlapping region is carried out after mirror image, then by scrolling function f (x, y, t) carry out the calculating of respective pixel value, otherwise, the pixel in institute overlapping region is directly passed through to scrolling function f (x, y, t) carry out the calculating of respective pixel value, in picture at same frame, carry out pixel rendering to all overlapping layers in overlapping region.Do not roll up in region in 1C region described, as put 16, pixel all properties assignment is constant.
Embodiment bis-:
Refer to Fig. 3, the inventive method the second embodiment, realizes a kind of anamorphotic system of scrolling mode of two-dimentional captions by the present invention, and described system comprises: caption window collecting unit, caption window space to be preserved unit, screen divider unit, rendering unit; While starting scrolling distortion, described caption window collecting unit obtains the parameters of basic dimensions of former caption window, and deformation parameter, and above parameter is passed to caption window space to be preserved unit, described caption window space to be preserved unit is according to deformation parameter, carry out caption window space to be preserved, thereby and determine captions scanning window, extract described captions scanning window parameter; Described screen divider unit, in described captions scanning window, according to scrolling function f (x, y, t), calculates scrolling position, and according to scrolling position, carries out screen divider; Described rendering unit, according to described screen divider, is played up each pixel position.
Wherein, described caption window collecting unit, the parameters of basic dimensions of collection comprises: former caption window length value X0, former caption window width value Y0; Deformation parameter at least comprises: scrolling diameter, scrolling direction, scrolling starting point, initial line has scrolled., scrolling start angle, scrolling speed.
Wherein, caption window headspace is determined according to scrolling diameter, scrolling direction, scrolling start angle in described caption window space to be preserved unit; Determine captions scanning window according to described caption window headspace, and extract maximum length and width.
Wherein, the physical location of scrolling region in described captions scanning window, in described captions scanning window, determined according to scrolling parameter, scrolling function f (x, y, t) in described screen divider unit; According to scrolling region described captions scanning window is divided into: crimp regions, scrolling region, do not roll up region.
Wherein, described rendering unit also comprises scrolling zone rendering unit, for carrying out overlapping playing up, first, according to the overlapping number of curling calculation of parameter overlapping region; Afterwards, judge whether overlapping once number is odd number, if so, the pixel in institute overlapping region is carried out after mirror image, then by scrolling function f (x, y, t) carry out the calculating of respective pixel value, otherwise, the pixel in institute overlapping region is directly passed through to scrolling function f (x, y, t) carry out the calculating of respective pixel value; Finally, in picture at same frame, carry out pixel rendering to all overlapping layers in overlapping region.
Claims (8)
1. a deformation method for the scrolling mode of two-dimentional captions, is characterized in that: specifically comprise:
1) obtain the parameters of basic dimensions of former caption window, and deformation parameter;
2) according to deformation parameter, carry out caption window space to be preserved, thereby and determine captions scanning window, extract described captions scanning window parameter;
3), in described captions scanning window, according to scrolling function f (x, y, t), calculate scrolling position, and according to scrolling position, carry out screen divider;
4), according to described screen divider, each pixel position is played up;
Described step 4) in specifically comprise:
41) in crimp regions, all pixel transparency attributes are all-transparent setting;
42), in scrolling region, calculate in the region that scrolls;
43), not rolling up in region, pixel all properties assignment is constant;
Described step 42) described in scrolling region calculate be specially:
42A) in A frame, pick up pixel (x1, y1) in scrolling region, by described scrolling function f (x, y,, t) according to x2=f1 (x1, y1), y2=f1 (x1, y1), obtain the respective pixel value (x2, y2) after distortion;
42B) in A+1 frame, pick up caption window pixel (x
n, y
n), change t value, by described scrolling function f (x, y, t), according to: x
n+1=f
n(x
n, y
n), y
n+1=f
n(x
n., y
n), obtain the respective pixel value (x after distortion
n+1, y
n+1);
42C) judge whether to exist overlapping region according to scrolling parameter, if so, overlapping area pixel point is played up, otherwise, will not calculate;
Described step 42C) described in overlapping area pixel point is played up, specifically comprise:
42C1) according to the overlapping number of scrolling calculation of parameter overlapping region;
42C2) judge whether the overlapping number of plies is odd number, if, the pixel in institute overlapping region is carried out after mirror image, carry out the calculating of respective pixel value by scrolling function f (x, y, t) again, otherwise, the pixel in institute overlapping region is directly carried out to the calculating of respective pixel value by scrolling function f (x, y, t);
42C3) in picture at same frame, carry out pixel rendering to all overlapping layers in overlapping region.
2. method as described in claim 1, is characterized in that: described step 1) described in parameters of basic dimensions comprise: former caption window length value X
0, former caption window width value Y
0;
Described deformation parameter at least comprises: scrolling diameter, scrolling direction, scrolling starting point, the initial line that scrolled, scrolling start angle, scrolling speed.
3. method as described in claim 1, is characterized in that: described step 2) in specifically comprise:
21) determine caption window headspace according to scrolling diameter, scrolling direction, scrolling start angle;
22) determine captions scanning window according to described caption window headspace, and extract maximum length and width.
4. method as described in claim 1, is characterized in that described step 3) in specifically comprise:
31), in described captions scanning window, determine the physical location of scrolling region in described captions scanning window according to scrolling parameter, scrolling function f (x, y, t);
32) according to scrolling region described captions scanning window is divided into: crimp regions, scrolling region, do not roll up region.
5. an anamorphotic system for the scrolling mode of two-dimentional captions, is characterized in that, described system comprises: caption window collecting unit, caption window space to be preserved unit, screen divider unit, rendering unit; While starting scrolling distortion, described caption window collecting unit obtains the parameters of basic dimensions of former caption window, and deformation parameter, and above parameter is passed to caption window space to be preserved unit, described caption window space to be preserved unit
According to deformation parameter, carry out caption window space to be preserved, thereby and determine captions scanning window, extract described captions scanning window parameter; Described screen divider unit, in described captions scanning window, according to scrolling function f (x, y, t), calculates scrolling position, and according to scrolling position, carries out screen divider; Described rendering unit, according to described screen divider, is played up each pixel position;
Described rendering unit also comprises scrolling zone rendering unit, for carrying out overlapping playing up, first, according to the overlapping number of scrolling calculation of parameter overlapping region; Afterwards, judge whether the overlapping number of plies is odd number, if so, the pixel in institute overlapping region is carried out after mirror image, then by scrolling function f (x, y, t) carry out the calculating of respective pixel value, otherwise, the pixel in institute overlapping region is directly passed through to scrolling function f (x, y, t) carry out the calculating of respective pixel value; Finally, in picture at same frame, carry out pixel rendering to all overlapping layers in overlapping region.
6. system as described in claim 5, is characterized in that, described caption window collecting unit, and the parameters of basic dimensions of collection comprises: former caption window length value X
0, former caption window width value Y
0; Deformation parameter at least comprises: scrolling diameter, scrolling direction, scrolling starting point, the initial line that scrolled, scrolling start angle, scrolling speed.
7. system as described in claim 5, is characterized in that, caption window headspace is determined according to scrolling diameter, scrolling direction, scrolling start angle in described caption window space to be preserved unit; Determine captions scanning window according to described caption window headspace, and extract maximum length and width.
8. system as described in claim 5, is characterized in that, the physical location of scrolling region in described captions scanning window, in described captions scanning window, determined according to scrolling parameter, scrolling function f (x, y, t) in described screen divider unit; According to scrolling region described captions scanning window is divided into: crimp regions, scrolling region, do not roll up region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110127377.XA CN102724443B (en) | 2011-05-17 | 2011-05-17 | Method and system for transformation of scrolling mode of two-dimensional caption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110127377.XA CN102724443B (en) | 2011-05-17 | 2011-05-17 | Method and system for transformation of scrolling mode of two-dimensional caption |
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| Publication Number | Publication Date |
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| CN102724443A CN102724443A (en) | 2012-10-10 |
| CN102724443B true CN102724443B (en) | 2014-11-05 |
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| CN105913473A (en) * | 2015-12-27 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | Realization method and system of scrolling special efficacy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101415079A (en) * | 2008-11-04 | 2009-04-22 | 新奥特（北京）视频技术有限公司 | Method for transforming subtitling object into Bessel curve |
| CN101453574A (en) * | 2007-11-28 | 2009-06-10 | 新奥特（北京）视频技术有限公司 | Trick method for subtitle motion |
| CN101465973A (en) * | 2008-11-04 | 2009-06-24 | 新奥特（北京）视频技术有限公司 | Method for rendering subtitling based on curved profile closed loop domain and pixel mask matrix |
| CN101764948A (en) * | 2008-11-04 | 2010-06-30 | 新奥特（北京）视频技术有限公司 | Segmenting method of self-intersection closed outline in caption object vector outline |
-
2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453574A (en) * | 2007-11-28 | 2009-06-10 | 新奥特（北京）视频技术有限公司 | Trick method for subtitle motion |
| CN101415079A (en) * | 2008-11-04 | 2009-04-22 | 新奥特（北京）视频技术有限公司 | Method for transforming subtitling object into Bessel curve |
| CN101465973A (en) * | 2008-11-04 | 2009-06-24 | 新奥特（北京）视频技术有限公司 | Method for rendering subtitling based on curved profile closed loop domain and pixel mask matrix |
| CN101764948A (en) * | 2008-11-04 | 2010-06-30 | 新奥特（北京）视频技术有限公司 | Segmenting method of self-intersection closed outline in caption object vector outline |
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