Showing papers on "Standard test image published in 1982"
TL;DR: In this paper, a system for digitization and storage of multiple images simultaneously, and multimode scan generation is described, which provides easy scan control, image digitization, automatic prescale adjust on acquisition, grey scale histogram generation, gray scale compression or expansion, image filtering, smoothing and random color assignment to grey levels.
5 citations
03 May 1982
TL;DR: An irrelevance reduction pre-processing technique which increases the efficiency of a subsequent block code and substitute each block with a prototype pattern out of a reduced pattern set in such a way that occuring picture impairments are limited to a minimum.
Abstract: This paper describes an irrelevance reduction pre-processing technique which increases the efficiency of a subsequent block code. The proposed method subdivides the image into blocks of 3×3 (5×5) picture elements. The aim is to substitute each block with a prototype pattern out of a reduced pattern set in such a way that occuring picture impairments are limited to a minimum. The substitution method is examined and the attained compression ratios are compared with a very efficient run length code. Its simplicity and its high compression ratio makes the proposed method suitable for real time applications.