CN101673409A - Image rendering method applied to computer screen - Google Patents
Image rendering method applied to computer screen Download PDFInfo
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- CN101673409A CN101673409A CN200910192228A CN200910192228A CN101673409A CN 101673409 A CN101673409 A CN 101673409A CN 200910192228 A CN200910192228 A CN 200910192228A CN 200910192228 A CN200910192228 A CN 200910192228A CN 101673409 A CN101673409 A CN 101673409A
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Abstract
The invention discloses an image rendering method applied to a computer screen, comprising the following steps: (1) a window for supporting a transparent channel is created; (2) display coordinates ofeach pixel in the image are computed, a three-dimensional accelerated graphics port is used for amplifying the image and rendering the image to a local video memory mapping, and background color is set into black ARGB; (3) chromatic values of a plurality of adjacent points in the image are averaged, and the rendered mapping is zoomed into output size; (4) the mapping in the local video memory isexchanged to an internal memory mapping by the operation of the three-dimensional accelerated graphics port:; (5) a two-dimensional Alpha mixed function is used for leading the internal memory mappingto be drawn on a desktop, so as to lead the image to be displayed on the desktop. The method can realize that three-dimensional cartoon images can be rendered out clearly and smoothly in a real-timemanner on any desktop background, thereby achieving good expressive form, eliminating sawtooth form at the edge part of the three-dimensional image, leading the image display to be real and achievingsmooth transition effect.
Description
Technical field
The present invention relates to the computer image processing technology field, particularly a kind of image rendering method that is applied to computer desktop.
Background technology
The desktop of computing machine is different and present the color of numerous and complicated along with background or the window opened, and a three-dimensional cartoon image is wanted to be independent of window and shown, just must can adapt to different background colors.Traditional 3D rendering model rendering method is to use three-dimensional picture accelerating interface (as Direct3D), directly image is rendered on the screen.Because this method only supports rectangle to play up, and be directly video memory to be operated, do not play up flow process, so be not suitable for playing up polygonal desktop picture through two dimension.
General method, for example create the method for supporting the transparent channel window: (1) is set as a window of supporting transparent channel to window when creating the use window, this window is by being provided with the transparent channel value of different pixels point, the Alpha that this pixel and the same position pixel color of bottom background are done in various degree mixes, thereby supports translucent playing up; (2) use the three-dimensional picture accelerating interface by the conventional method rending model, the background color of playing up is set to black; (3) paint on the window with the two-dimensional graphics interface, again the background color of window is arranged to transparent black, at this moment, all black parts will hollow out, reaches the purpose of drawing polygonal window.
The defective of said method is, because in the time of three-dimensional rendering, the three-dimensional picture accelerating interface is not supported translucent, even and the whole figure that causes exporting is having under the situation of supporting the transparent channel window, still can not just mix with background colour, particularly the part at edge has tangible sawtooth sense.Simultaneously, because sawtooth can appear in the person model that utilizes the three-dimensional picture accelerating interface directly to play up out, visual effect is not ideal, and relatively poor with the fusion of background on the table, makes sawtooth show more obviously.
Summary of the invention
Based on the defective that exists in the prior art, the object of the present invention is to provide a kind of 3-D view rendering intent that can effectively merge display image and desktop background, to eliminate the crenellated phenomena of display image marginal portion.
The technical solution adopted in the present invention: a kind of image rendering method that is applied to computer desktop may further comprise the steps:
(1) creates a window of supporting transparent channel;
(2) calculate the displaing coordinate of each pixel in the image, this image is amplified and play up to the video memory pinup picture with the three-dimensional picture accelerating interface, background colour be made as into black ARGB (Alpha, Red, Green, Blue);
(3) to the color-values calculating mean value of plurality of adjacent points in the image (adjacent selection of counting is associated with enlargement factor in the above-mentioned steps (2)), and the pinup picture after will playing up zooms to the output size;
(4) by the operation of three-dimensional picture accelerating interface the pinup picture in the video memory is exchanged on the internal memory pinup picture;
(5) use two-dimentional Alpha mixed function that the internal memory pinup picture is painted on the desktop, image is shown on the desktop.
Image magnification ratio in the above-mentioned steps (2) is 2 times, the length of the image after promptly amplifying and the length that width is original image and the twice of width.
Background colour in the above-mentioned steps (2) is black ARGB (255,255,255,255).
The color-values of image is with adjacent 4 calculating mean values in the above-mentioned steps (3), and its account form is:
p
a＝(s1
a+s2
a+s3
a+s4
a)/4
p
r＝(s1
r+s2
r+s3
r+s4
r)/4
p
g＝(s1
g+s2
g+s3
g+s4
g)/4
p
b＝(s1
b+s2
b+s3
b+s4
b)/4
Pv＝ARGB(p
a，p
r，p
g，p
b)
Wherein: s represents the source color, and p represents color of object.
Two-dimentional Alpha mixed function in the above-mentioned steps (5) is:
d
r＝b
r(1-s
a)+s
rs
a
d
g＝b
g(1-s
g)+s
gs
a
d
b＝b
b(1-s
b)+s
bs
a
d
v＝RGB(d
r，d
g，d
b)
Wherein: d represents screen color, and b represents background color, and color is played up in the s representative.
The present invention can realize with the three-dimensional cartoon image no matter can be clear under any desktop background, mellow and full ground real-time rendering comes out, reach a good form of expression, eliminated the zigzag fashion of 3-D view marginal portion, it is truer to make that image shows, reaches the effect that seamlessly transits.
Description of drawings
Fig. 1 is the simple and easy process flow diagram of image rendering method of the present invention;
Fig. 2 is the particular flow sheet of image rendering method of the present invention;
Fig. 3 is the convergent-divergent pinup picture synoptic diagram in the image rendering method step of the present invention (3).
Embodiment
Below in conjunction with accompanying drawing concrete structure of the present invention is further described.
As shown in Figure 1, 2, the method played up of image of the present invention realizes by following steps:
(1) creates window: create a window of supporting transparent channel, can be Alpha with desktop and mix.
(2) rendering image: calculate the displaing coordinate of each pixel in the image, this image is amplified and play up to the video memory pinup picture with the three-dimensional picture accelerating interface, background colour is made as into black ARGB (255,255,255,255); The length of the image after the amplification and width are the length of original image and the twice of width, that is:
H＝2h
W＝2w
Wherein: H, W are length (highly) and the width of playing up pinup picture; H, w are original length (highly) and width.
(3) convergent-divergent pinup picture: the pinup picture after will playing up zooms to the output size, reach anti-sawtooth effect, in this process by with the effect that transparent channel is arranged, by to color-values calculating mean value adjacent 4 in the image, the every bit that convergent-divergent comes out all can correspondingly have a transparent value, as shown in Figure 3.
The account form of average color value is:
p
a＝(s1
a+s2
a+s3
a+s4
a)/4
p
r＝(s1
r+s2
r+s3
r+s4
r)/4
p
g＝(s1
g+s2
g+s3
g+s4
g)/4
p
b＝(s1
b+s2
b+s3
b+s4
b)/4
Pv＝ARGB(p
a，p
r，p
g，p
b)
Wherein: s represents the source color, and p represents color of object.
(4) exchange pinup picture: the pinup picture in the video memory is exchanged on the internal memory pinup picture by the operation of three-dimensional picture accelerating interface;
(5) screen is played up: use two-dimentional Alpha mixed function that the internal memory pinup picture is painted on the desktop, image is shown on the desktop.The transparent value of image is exactly by doing hybrid operation with background, the translucent effect that reaches, and wherein, two-dimentional Alpha mixed function is:
d
r＝b
r(1-s
a)+s
rs
a
d
g＝b
g(1-s
g)+s
gs
a
d
b＝b
b(1-s
b)+s
bs
a
d
v＝RGB(d
r，d
g，d
b)
Wherein: d represents screen color, and b represents background color, and color is played up in the s representative.
By above-mentioned rendering intent, the present invention can realize the three-dimensional cartoon image no matter can be clear under any desktop background, mellow and full ground real-time rendering comes out, reach a good form of expression, eliminated the zigzag fashion of 3-D view marginal portion, it is truer to make that image shows, reaches the effect that seamlessly transits.
Claims (5)
1. an image rendering method that is applied to computer desktop is characterized in that, may further comprise the steps:
(1) creates a window of supporting transparent channel;
(2) calculate the displaing coordinate of each pixel in the image, this image is amplified and play up to the video memory pinup picture with the three-dimensional picture accelerating interface, background colour is made as into black ARGB;
(3) to the color-values calculating mean value of plurality of adjacent points in the image, and the pinup picture after will playing up zooms to the output size;
(4) by the operation of three-dimensional picture accelerating interface the pinup picture in the video memory is exchanged on the internal memory pinup picture;
(5) use two-dimentional Alpha mixed function that the internal memory pinup picture is painted on the desktop, image is shown on the desktop.
2. according to the described image rendering method that is applied to computer desktop of claim 1, it is characterized in that the image magnification ratio in the described step (2) is 2 times, the length of the image after promptly amplifying and the length that width is original image and the twice of width.
3. according to the described image rendering method that is applied to computer desktop of claim 1, it is characterized in that the background colour in the described step (2) is black ARGB (255,255,255,255).
4. according to the described image rendering method that is applied to computer desktop of claim 1, it is characterized in that the color-values of image is with adjacent 4 calculating mean values in the described step (3), its account form is:
p
a＝(s1
a+s2
a+s3
a+s4
a)/4
p
r＝(s1
r+s2
r+s3
r+s4
r)/4
p
g＝(s1
g+s2
g+s3
g+s4
g)/4
p
b＝(s1
b+s2
b+s3
b+s4
b)/4
Pv＝ARGB(p
a，p
r，p
g，p
b)
Wherein: s represents the source color, and p represents color of object.
5. according to the described image rendering method that is applied to computer desktop of claim 1, it is characterized in that the two-dimentional Alpha mixed function in the described step (5) is:
d
r＝b
r(1-s
a)+s
rs
a
d
g＝b
g(1-s
g)+s
gs
a
d
b＝b
b(1-s
b)+s
bs
a
d
v＝RGB(d
r，d
g，d
b)
Wherein: d represents screen color, and b represents background color, and color is played up in the s representative.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101922284A CN101673409B (en) | 2009-09-11 | 2009-09-11 | Image rendering method applied to computer screen |
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|---|---|---|---|
| CN2009101922284A CN101673409B (en) | 2009-09-11 | 2009-09-11 | Image rendering method applied to computer screen |
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| CN101673409B CN101673409B (en) | 2011-09-21 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087750A (en) * | 2010-06-13 | 2011-06-08 | 湖南宏梦信息科技有限公司 | Method for manufacturing cartoon special effect |
| CN102737402A (en) * | 2011-05-11 | 2012-10-17 | 新奥特（北京）视频技术有限公司 | Method for multilayer rendering in programmable phase in graphic rendering |
| CN103218847A (en) * | 2012-01-19 | 2013-07-24 | 联想(北京)有限公司 | Method and device of image processing |
| CN104240276A (en) * | 2014-09-04 | 2014-12-24 | 无锡梵天信息技术股份有限公司 | Screen-space-based method for simulating real skin of figure through sub-surface scattering |
| CN104715454A (en) * | 2013-12-14 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Anti-aliasing graph overlapping algorithm |
| CN105701858A (en) * | 2016-01-07 | 2016-06-22 | 网易（杭州）网络有限公司 | Map processing method and device based on alpha fusion |
| CN107347116A (en) * | 2017-06-30 | 2017-11-14 | 北京金山安全软件有限公司 | Desktop effect generation method and device and electronic equipment |
| CN109065001A (en) * | 2018-06-20 | 2018-12-21 | 腾讯科技（深圳）有限公司 | A kind of down-sampled method, apparatus, terminal device and the medium of image |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100493165B1 (en) * | 2002-12-17 | 2005-06-02 | 삼성전자주식회사 | Method and apparatus for rendering image signal |
| CN1930588A (en) * | 2004-03-12 | 2007-03-14 | 皇家飞利浦电子股份有限公司 | Adaptive sampling along edges for surface rendering |
| CN101354793B (en) * | 2008-09-10 | 2010-09-22 | 汕头市超声仪器研究所有限公司 | Real time three-dimensional image smoothing process method based on pattern processor |
-
2009
- 2009-09-11 CN CN2009101922284A patent/CN101673409B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087750A (en) * | 2010-06-13 | 2011-06-08 | 湖南宏梦信息科技有限公司 | Method for manufacturing cartoon special effect |
| CN102737402A (en) * | 2011-05-11 | 2012-10-17 | 新奥特（北京）视频技术有限公司 | Method for multilayer rendering in programmable phase in graphic rendering |
| CN103218847B (en) * | 2012-01-19 | 2016-08-10 | 联想(北京)有限公司 | Image processing method and device |
| CN103218847A (en) * | 2012-01-19 | 2013-07-24 | 联想(北京)有限公司 | Method and device of image processing |
| CN104715454A (en) * | 2013-12-14 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Anti-aliasing graph overlapping algorithm |
| CN104715454B (en) * | 2013-12-14 | 2017-10-24 | 中国航空工业集团公司第六三一研究所 | A kind of antialiasing figure stacking method |
| CN104240276A (en) * | 2014-09-04 | 2014-12-24 | 无锡梵天信息技术股份有限公司 | Screen-space-based method for simulating real skin of figure through sub-surface scattering |
| CN105701858A (en) * | 2016-01-07 | 2016-06-22 | 网易（杭州）网络有限公司 | Map processing method and device based on alpha fusion |
| CN105701858B (en) * | 2016-01-07 | 2018-09-14 | 网易（杭州）网络有限公司 | A kind of stick picture disposing method and device based on alpha fusions |
| CN107347116A (en) * | 2017-06-30 | 2017-11-14 | 北京金山安全软件有限公司 | Desktop effect generation method and device and electronic equipment |
| CN107347116B (en) * | 2017-06-30 | 2019-11-26 | 北京金山安全软件有限公司 | Desktop effect generation method and device and electronic equipment |
| CN109065001A (en) * | 2018-06-20 | 2018-12-21 | 腾讯科技（深圳）有限公司 | A kind of down-sampled method, apparatus, terminal device and the medium of image |
| CN109065001B (en) * | 2018-06-20 | 2021-06-25 | 腾讯科技（深圳）有限公司 | Image down-sampling method and device, terminal equipment and medium |
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| Publication number | Publication date |
|---|---|
| CN101673409B (en) | 2011-09-21 |
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Address after: 511446 Guangzhou City, Guangdong Province, Panyu District, South Village, Huambo Business District Wanda Plaza, block B1, floor 28 Patentee after: Guangzhou Huaduo Network Technology Co., Ltd. Address before: 4 building, No. 44, Jianzhong Road, Guangzhou, Guangdong, Tianhe District 510000, China Patentee before: Guangzhou Huaduo Network Technology Co., Ltd. |