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Improved block truncation coding for color image compression in LCD overdrive

The overdrive techniques have been widely used to reduce motion blur on liquid-crystal displays (LCD). However, these techniques require a large size of the frame buffer to shorten the response time of the liquid crystal. In this paper, we propose an improved block truncation coding (BTC) that can significantly reduce the memory used for the overdrive. Experimental results show that the proposed algorithm improves the compression ratio by a factor of two while maintaining the edge preservation characteristics as compared with the conventional BTC algorithm.