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» Adaptive Coding of DCT Coefficients by Golomb-Rice Codes
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ICIP
2002
IEEE
15 years 11 months ago
DCT approximation for low bit rate coding using a conditional transform
A transform approximation is explored for speeding up the software compression of images and video. It is used to replace the regular DCT whenever only few DCT coefficients are ac...
Ricardo L. de Queiroz
DCC
2008
IEEE
14 years 11 months ago
Rate Bounds on SSIM Index of Quantized Image DCT Coefficients
In this paper, we derive bounds on the Structural SIMilarity (SSIM) Index as a function of quantization rate for fixed-rate uniform quantization of image discrete cosine transform...
Sumohana S. Channappayya, Alan C. Bovik, Robert W....
72
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ICASSP
2008
IEEE
15 years 4 months ago
A detection algorithm for zero-quantized DCT coefficients in JPEG
The discrete cosine transform (DCT) is widely used in image/video coding standards. However, since most DCT coefficients will be quantized to zeros, a large number of redundant co...
Jin Li, Jarmo Takala, Moncef Gabbouj, Hexin Chen
SCIA
2005
Springer
115views Image Analysis» more  SCIA 2005»
15 years 3 months ago
DCT Based High Quality Image Compression
Abstract. DCT based image compression using blocks of size 32x32 is considered. An effective method of bit-plane coding of quantized DCT coefficients is proposed. Parameters of pos...
Nikolay N. Ponomarenko, Vladimir V. Lukin, Karen E...
ICMCS
2008
IEEE
119views Multimedia» more  ICMCS 2008»
15 years 3 months ago
Laplacian modeling of DCT coefficients for real-time encoding
Digital image/video coding standards such as JPEG, H.264 are becoming more and more important for multimedia applications. Due to the huge amount of computations, there are signif...
Jin Li, Moncef Gabbouj, Jarmo Takala, Hexin Chen