Novel block truncation coding of image sequences for limited-color display

Abstract

To compress color image sequences, a novel color Block truncation coding (BTC) algorithm, called quaternion-moment block truncation coding (QMBTC), is presented in this paper. The QMBTC is derived by using quaternion arithmetic and the moment-preserving principle. To compress color image sequences for limited-color display, we combine the QMBTC with the procedures of coded/uncoded block determination and color palette design. The advantage of the proposed coder is in the low decoder complexity. It can decode the compressed image in real-time without the assistance of specific hardware for limited-color display.