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对由于传输信道干扰而产生的分形压缩编码数据传输时产生的图像坏块 ,提出了一种检测方法 ,并用遗传算法在该图像中搜索坏块的相似块 ,用相似块来取代坏块 ,从而达到误差掩蔽的效果。仿真结果表明 ,对数据传输中所产生的图像坏块 ,采用所提出的图像坏块检测方法 ,坏块检出率高 ,并且在使用所提出的图像误差掩蔽方法后 ,图像质量有明显改善。
A kind of detection method is proposed for the bad blocks of image generated by the fractal compression encoded data transmission caused by the transmission channel interference. The genetic algorithm is used to search the similar blocks of bad blocks and replace the bad blocks with similar blocks To achieve the effect of error masking. The simulation results show that the bad blocks detected in the data transmission are detected by using the proposed method of bad blocks detection, and the detection rate of bad blocks is high. After the proposed image error concealment method is used, the image quality is greatly improved.