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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
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Proceedings Article
01 Jan 2006
TL;DR: A high-speed three-dimensional (3-D) graphics SoC for consumer applications is presented that provides full programmability in vertex and triangle level, and two-level multi-texturing with trilinear MIPMAP filtering are realized in the rasterization part.
Abstract: A high-speed three-dimensional (3-D) graphics SoC for consumer applications is presented. A 166-MHz 3-D graphics full pipeline engine with performance of 33 Mvertices/s and 1.3 Gtexels/s, and 333-MHz ARM11 RISC processor, and video composition IPs are integrated together on a single chip. The geometry part of 3-D graphics IP provides full programmability in vertex and triangle level, and two-level multi-texturing with trilinear MIPMAP filtering are realized in the rasterization part. Per-pixel effects such as fog effects, alpha blending, and stencil test are also implemented in the proposed 3-D graphics IP. The rasterization architecture is designed for reducing external memory accesses to achieve the peak performance. The chip is fabricated using 0.13 μm CMOS technology and its area is 7.1 x 7.0 mm 2 .

30 citations

Journal ArticleDOI
TL;DR: A graph wavelet transform-based steganography using graph signal processing (GSP) is presented, which results in better visual quality stego image as well as extracted secret image and simulation results show that the proposed scheme is more robust than other existing Steganography techniques.
Abstract: Steganography is used for secret or covert communication. A graph wavelet transform-based steganography using graph signal processing (GSP) is presented, which results in better visual quality stego image as well as extracted secret image. In the proposed scheme, graph wavelet transforms of both the cover image and transformed secret image (using Arnold cat map) are taken followed by alpha blending operation. The GSP-based inverse wavelet transform is performed on the resulting image, to get the stego image. Here, the use of GSP increases the inter-pixel correlation that results in better visual quality stego and extracted secret image as shown in simulation results. Simulation results show that the proposed scheme is more robust than other existing steganography techniques.

30 citations

Patent
Tinic Uro1
02 Sep 2005
TL;DR: In this article, a system and method provides video and its corresponding alpha channel data using a single stream or file, compressed using the same format and decompression algorithm for each of the video data and the alpha channel.
Abstract: A system and method provides video data and its corresponding alpha channel data using a single stream or file, compressed using the same format and decompression algorithm for each of the video data and the alpha channel data.

29 citations

Proceedings ArticleDOI
Marco Salvi1, Karthik Vaidyanathan1
14 Mar 2014
TL;DR: This work introduces multi-layer alpha blending, a novel solution to real-time order-independent transparency that operates in a single rendering pass and in bounded memory.
Abstract: We introduce multi-layer alpha blending, a novel solution to real-time order-independent transparency that operates in a single rendering pass and in bounded memory. The main contribution of our method is a new scalable approximation for the compositing equation that makes possible to easily trade off better image quality for more memory and lower performance. We demonstrate improved image quality and performance over previously published methods, while also reducing memory requirements.

29 citations

Patent
Shengyang Dai1, Mei Han1, Wei Xu1, Ying Wu1, Yihong Gong1 
10 Oct 2007
TL;DR: In this article, systems and methods for processing a low-resolution image by performing a high resolution edge segment extraction on the low resolution image, performing an image super resolution on each edge segment; performing reconstruction constraint reinforcement; and generating a high quality image from the low quality image.
Abstract: Systems and methods are disclosed for processing a low resolution image by performing a high resolution edge segment extraction on the low resolution image; performing an image super resolution on each edge segment; performing reconstruction constraint reinforcement; and generating a high quality image from the low quality image.

29 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20221
20219
20208
201913
201821
201723