Lossless and Low-Power Image Compressor for Wireless Capsule Endoscopy

Table 4

Comparison between proposed (mode-1) and standard JPEG-LS algorithm.

	Proposed algorithm	JPEG-LS
Color plane	YUV	RGB
Prediction	Static	Dynamic (based on edge detection)
Buffer memory requirement	0	memory to store one row of image pixel + 1.9 KB for context register
𝑘-parameter	Fixed	Dynamically calculated based on context array
Coding	Golomb-rice and Unary	Golomb-rice
Run mode	No (as long runs are rare in WCE images)	Yes
Avg. CR for WCE Image	67.0% (without clip)	57.9% (without clip)
	73.2% (with clip)	—