Lossless Image Compression Algorithm for Transmitting Over Low Bandwidth Line

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Executive Summary

In this paper to decrease the communication bandwidth and save the transmitting power in the wireless endoscopy capsule, this paper presents a new near-lossless image compression algorithm based on the Bayer format image suitable for hardware design. This algorithm can provide low average compression rate (2.12 bits/pixel) with high image quality (larger than 53.11 dB) for endoscopic images. Especially, it has low complexity hardware overhead (only two line buffers) and supports real-time compressing. In addition, the algorithm can provide lossless compression for the Region Of Interest (ROI) and high-quality compression for other regions. The ROI can be selected arbitrarily by varying ROI parameters.

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