On a predictive scheme for colour image quantization

摘要: In this paper we proposed an improved colour image quantization scheme based on predictive coding. Since the neighbouring pixels are quite similar in most images, similarity among encoded is exploited. distinct colours collected to form a smaller state-palette. If closest state-palette current encoding pixel, index of recorded. Otherwise, original palette for pixel searched and corresponding The experimental results show that method achieves good qualities while requiring much lower bit rates compression.