关键词: 图像压缩, 分形图像编码, 解码图像质量, 预测, 平均拼贴误差, 拼贴定理

Abstract: A new decoded image quality prediction algorithm for fractal image coding was proposed. According to the results of many experiments, there exists an approximately exponential discipline between the average collage error and the PSNR of decoded image quality. The collage error of each range block was computed in the fractal encoding process and the PSNR of decoded image quality was predicted according to the average collage error. The experimental results show that for different sizes of range blocks and fast fractal image encoding, the proposed algorithm can obtain satisfying prediction results of decoded image quality.

Key words: image compression, fractal image coding, decoded image quality, prediction, average collage error, collage theorem