EBCOT算法改进研究及实现

Research and Realization of the Improving EBCOT Algorithm

采用自适应相对距离最近阈值法对图像进行小波分解,从而得到不同级别不同序号的子带。将小波分解后的高频子带划分为4×4的局部块,在位平面编码时采用两种方法,即位平面0、1、2清除通道编码省略法和位平面6、7一次扫描法,提高了压缩比和编码效率。

The nearest relative adaptive thresholding wavelet decomposition of images, resulting in different levels of the different number of sub-band, after the wavelet decomposition of the high-frequency sub-band is divided into 4 × 4 partial blocks, used in power-plane coding 0,1,2-plane ascended the throne two methods to clear channel coding and bit plane omitted 6,7 a scanning method, increased compression ratio and coding efficiency.