基于自适应空域滤波的图像去块效应算法

分块有损压缩图像忽略了块间相关性，重构时会产生块效应，该文提出一种空域自适应去块效应算法。对块边缘采用方向自适应有理滤波，以弱化块效应。根据块的内部活动性将图像块分成平坦块和纹理块2类，利用基于方差的空域检测方法检测出平坦块，并对平坦块进行邻块边缘自适应平滑。实验结果表明，该算法有效去除了块效应，一定程度上提高了信噪比，算法简单且鲁棒性较好。

Deblock Algorithm for Compressed Image Based on Adaptive Space Domain Filtering

Block lossy image compression often introduces quantization noise which exhibits block artifact in the reconstructed image especially when the compression ratio is high.This paper introduces a deblock algorithm using space domain adaptive filtering.The algorithm uses an edge-adaptive filter to smooth the block edges of the image to alleviate the block artifact.The uniform blocks of the image is detected using a variation-based method and is smoothed using a neighbor block-relied filtering method.Experimenta...