摘要
提出了一种分形图像编码的方法——基于四叉树的分形图像编码 ( FICBQ)方法。这种方法采用二值图像的四叉树表示方法实现图像分割 ,图像块的尺寸可以动态调整。与基本自动分形图像编码 ( BAFIC)相比 ,它克服了图像分割时图像块尺寸固定的主要缺陷。 FICBQ方法简单且易于实现 ,压缩比和编码速度得到明显提高。实验结果表明 ,该方法的 RPSN和压缩率分别是 2 9.37d B和11.0 9时 ,编码时间约是 BAFIC方法的 1/ 2 2。
A fractal image coding method based on quadtree(FICBQ) is presented. The method separates a binary image by means of the quadtree method while the image size can be dynamically changed. Compared to the basic automatic fractal image coding(BAFIC), it overcomes the BAFIC shortcoming that an image is divided into some ranges with equal size. The FICBQ is simple in image division and can obtain higher compression ratio with less computation time in coding. Experimental results show that when FICBQ has R PSN of 29.37 dB and a compression ratio of 11.09, the coding time is about 1/22 that of BAFIC′.
出处
《数据采集与处理》
CSCD
2000年第4期457-461,共5页
Journal of Data Acquisition and Processing
关键词
图像处理
分形
图像编码
图像压缩
四叉树
image processing
fractal
image coding
image compression
quadtree
