Abstract: White Block Skipping(WBS) coding, which uses the character that binary images contain a large amount of white area, can make a great decrease in the information of white pixels to get low bit rate. But the compressing multiples of images those contain more blacks are not good because black pixels have not been compressed. This paper proposes a better way called adaptive block skipping for this limitation. The new approach will do compression also to the blacks by the new adaptive black block skipping in the scan lines those have more black than white. Experiments show that better multiples can be gotten by using this new method to images those contain much more blacks.

Key words: binary image, White Block Skipping(WBS), bit rate, adaptive

摘要： 跳白块编码利用二值图像白色区域居多的特征，对白像素信息进行大幅缩减获得低比特率，但由于未对黑像素进行压缩，因此对于黑色较多的二值图像压缩比不高。针对此问题，提出一种新的自适应跳块编码，对图像中黑像素较多的扫描行采用跳黑块编码，对黑像素进行压缩。实验证明，该方法用于黑像素较多的二值图像时也能达到较高的压缩比。

关键词: 二值图像, 跳白块, 比特率, 自适应

CLC Number: 

• TP391.41