Compression of images in CFA format

Date
2006
Advisor
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Source Title
Proceedings of the International Conference on Image Processing, IEEE 2006
Print ISSN
1522-4880
Electronic ISSN
Publisher
IEEE
Volume
Issue
Pages
1141 - 1144
Language
English
Type
Conference Paper
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Abstract

In this paper, images in Color Filter Array (CFA) format are compressed without converting them to full-RGB color images. Green pixels are extracted from the CFA image data and placed in a rectangular array, and compressed using a transform based method without estimating the corresponding luminance values. In addition, two sets of color difference (or chrominance) coefficients are obtained corresponding to the red and blue pixels of the CFA data and they are also compressed using a transform based method. The proposed method produces better PSNR values compared to the standard approach of bilinear interpolation followed by compression.

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Keywords
Discrete cosine transforms, Huffman codes, Image coding, Quantization, A-transform, Bilinear interpolation, Color difference, Color filter arrays, Color images, Compression of images, Image data, Luminance value, Rectangular arrays, Color, Cosine transforms, Imaging systems, Metadata, Pixels
Citation
Published Version (Please cite this version)