scispace - formally typeset
Search or ask a question
Topic

Alpha compositing

About: Alpha compositing is a research topic. Over the lifetime, 482 publications have been published within this topic receiving 11035 citations. The topic is also known as: alpha blend & alpha channel.


Papers
More filters
Patent
25 May 2011
TL;DR: In this paper, a method for producing a moving picture of composite user image is provided to increase a learning effect and an entertainment effect by enabling a user to be a main character of the moving picture.
Abstract: PURPOSE: A method for producing a moving picture of composite user image is provided to increase a learning effect and an entertainment effect by enabling a user to be a main character of the moving picture. CONSTITUTION: A method for producing a moving picture comprises steps of: preparing a user image(S10); making a composite object layer(S20); adjusting a size and a position of the composite object corresponding to the composite area of the moving picture(S30); making a composite layer using a mask layer including an alpha channel(S40); and producing a customized moving picture by combining the composite layer and the moving picture(S50).

1 citations

Patent
11 Jul 2012
TL;DR: In this article, a multi-type sensor information real-time display method by software based on a software 3D (threedimensional) game view angle picture display mode, which mainly uses the direct 3D multimedia development technique.
Abstract: The invention relates to a multi-type sensor information real-time display method by software based on a software 3D (three-dimensional) game view angle picture display mode, which mainly uses the direct 3D multimedia development technique. The method includes: firstly, using a programmable pipeline way (GPU (graphic processing unit) rendering) to give full play of GPU functions and realize great improvement of display efficiency by the aid of high efficiency of direct 3D; and secondly, using direct 3D to process flexibility of pictures, on the one hand, using a 3D game view angle picture display mode to realize display of special effects such as eccentric display, zooming display, superposition of background maps, roaming and the like by continuously adjusting world coordinates and viewpoint coordinates in 3D scenes, and on the other side, using a video image alpha channel mixing way to realize afterglow display of radar video. The method has the advantages of high programming flexibility, high instantaneity, low cost, easiness in implementation and the like based on a commercial computer framework.

1 citations

01 Jan 1997
TL;DR: In this paper, the authors developed a technique for blue screen matting that manipulates the image when the information for the image is available only in compressed form, such as a JPEG or MPEG bitstream.
Abstract: Chroma-keying or blue screen matting is an important video editing operation. In blue screen matting. everything in the image that has the "user specified level for the blue channel" is "keyed" out and replaced by either another image or a color from a color generator. We develop a technique for blue screen matting that manipulates the image when the information for the image is available only in compressed form; such as a JPEG or MPEG bitstream. Specifically; for the compressed domain approach; we show that the matting process is a convolution operation; hence. we develop a DCT convolution theorem. The DCT convolution theorem can be used to show that the compressed domain approach proposed in this paper provides a significant reduction in computation complexity compared to previously developed approaches which were mostly adhoc techniques. The convolution theorem exploits the sparseness as well as the orthogonality of the data available in the DCT domain and thus yields an efficient algorithm for the chroma-keying or blue screen matting. The algorithm extends to the DCT domain concepts such as alpha channel and premultiplied alpha. The method is also extended to MPEG video domain wherein we explore the efficiency of the matting process when interframe coding is used.

1 citations

Patent
20 Feb 2009
TL;DR: In this paper, a method for inserting a watermark in the video being played back in real time was described, by using the OSD mixer data included in the image reproducing apparatus.
Abstract: The present invention, by using the OSD mixer data included in the image reproducing apparatus discloses a method for inserting a watermark in the video being played back in real time. The present invention determines the watermark pattern representing information about the reproduction of the original image, and the OSD data mixer converted to a watermark data in a recognizable form discloses a method for synthesizing the image being played back through the OSD data mixer. Watermark, alpha blending, blender, OSD (On Screen Display)

1 citations

Patent
16 Aug 2011
TL;DR: In this paper, a page constituting an electronic album is selected and a stereoscopic image is then selected and the selected stereo image is pasted in an image compositing area.
Abstract: Viewing of stereoscopic images is facilitated for every page of an electronic album. A page constituting an electronic album is selected. A stereoscopic image is then selected and the selected stereoscopic image is pasted in an image compositing area. An amount of parallax has been defined for the image compositing area, and the amount of parallax of the image compositing area in which the stereoscopic image has been pasted is read. The amount of parallax of the stereoscopic image is changed to that of the image compositing area.

1 citations


Network Information
Related Topics (5)
Rendering (computer graphics)
41.3K papers, 776.5K citations
77% related
Mobile device
58.6K papers, 942.8K citations
72% related
Mobile computing
51.3K papers, 1M citations
71% related
User interface
85.4K papers, 1.7M citations
70% related
Feature (computer vision)
128.2K papers, 1.7M citations
70% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20221
20219
20208
201913
201821
201723