1. A subband coding technique for image compression in single CCD cameras with Bayer color filter arrays
- Author
-
T. Toi and M. Ohita
- Subjects
Bayer filter ,Demosaicing ,business.industry ,Computer science ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Data_CODINGANDINFORMATIONTHEORY ,Color co-site sampling ,Sub-band coding ,Hadamard transform ,Color gel ,Media Technology ,RGB color model ,Computer vision ,Color filter array ,Artificial intelligence ,Electrical and Electronic Engineering ,business ,Data compression ,Image compression - Abstract
This paper presents a subband coding technique suitable for image compression in a single CCD camera with a Bayer color filter array (CFA). In it, we have applied a SSKF (symmetric short kernel filter) both horizontally and vertically to red and blue color signals, and a two dimensional perfect reconstruction filter to green color signals. Here, we compare this technique to two other image compression methods: DPCM and the Hadamard transform, each of which also allows an output signal from the CCD in a color camera to be compressed directly with simple logic circuitry and is suitable for use in low cost video conference cameras. Simulation results demonstrate that the subband coding offers the best quality (27-30 dB) with a compression ratio of approximately 2 bit/pel.
- Published
- 1999
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