【摘要】 降质或退化的图像通常存在不同程度的边缘模糊、局部或整体对比度差等不足,直接采用边缘提取算子对此类图像进行边缘提取有时导致边缘过提升,即噪声"突兀",其结果会影响整幅图像的协调性。边缘提取前,采用USM(Un-sharp masking)反锐化掩模增强图像,只要参数设置合理,USM增强可以对图像起到很好的增强效果,有利于图像的边缘提取。更多还原

【Abstract】 There are some image blurry,the poor contrast gradient of partial or the over image in the degenerated image.The edge over-promotion of this image,namely noise ’towering’,is caused by the edge extraction operator,which affects the coordination of the whole image.Before the edge extraction,so long as the parameter establishment is reasonable,the image enhancement method of the USM(Unsharp Masking) may obtain the better image in the vision and its result is advantageous in the edge extraction of the image.更多还原