enhancing of image edge 图像边缘增强
Median filter technology is a non-linear technology that can preserve image edge while removing noise. It is used in many fields widely, e. g. image enhancing and restoration.
中值滤波技术是一种在去除噪声的同时能较好保护图像边缘细节的非线性技术，在图像增强和恢复等领域中得到了广泛的应用。
By identifying and inputting the image format, improving the quality of image, extracting and enhancing the edge of image, the image-based numerical control engraving system was researched.
通过对图像格式识别与输入、图像质量改善、图像边缘提取和增强，进行了基于图像的数控雕刻系统研究。
Finally, it gave an image de-noising algorithm of coherence enhancing diffusion, which used wavelet coefficients to estimate the image edge according to the wavelets time-frequent analysis function.
针对相干增强扩散计算扩散矩阵较慢的缺点，提出了一种用小波系数估计图像边缘方向的相干增强扩散图像降噪算法。
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