Hierarchical Compression of Color Look Up Tables
نویسندگان
چکیده
Color lookup tables (CLUTs) that are embedded in printer firmware consume precious flash memory. In order to conserve memory and thereby reduce cost, it is desirable to compress CLUTs prior to storage and restore tables as required. In this paper, we investigate methods for lossless compression of CLUTs. We demonstrate that, through suitable pre-processing of data, significant improvements in compression performance can be obtained as compared to a direct application of lossless data compression methods. In particular, the gains in performance with the proposed methods are accomplished by exploiting the characteristics of CLUT data and utilizing a combination of hierarchical differential encoding and re-ordering for the preprocessing. Experimental results over a representative data set indicate that the proposed methods can result in a 26% reduction in memory requirements in comparison to direct compression. As compared to uncompressed tables this corresponds to a memory saving of 68%.
منابع مشابه
Preprocessing Methods for Improved Lossless
t s c s m t m d d i p t c r n r t h c c fi i c p bstract. Color look-up tables (CLUTs) that provide transformaions between various color spaces are commonly embedded in rinter firmware where they are stored in relatively expensive flash emory. As the number of look-up tables in color devices increases n size, the space requirements of storing these CLUTs also inrease. In order to conserve memor...
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