Aiming at the problem that the classic Sobel edge detection system has inaccurate positioning and eliminates the blurred or impossible extraction of image edge feature extraction caused by the noise difference between Gaussian and pepper and salt,an improved fast median filtering algorithm combined with the eight-direction Sobel operator is proposed.Firstly,the fast median filter-ing algorithm is used to eliminate the image noise,and then the eight-direction Sobel operator is used to improve the accuracy of edge localization and improve the accuracy of edge information extraction in the face of noise.An improved fast median edge detection sys-tem accurately locates image edges in dense mixed noise.The improved algorithm doubles the amount of computation and uses FPGA hardware to implement it,and the experimental results verify the feasibility of the algorithm.
关键词
混合噪声/快速中值滤波/八方向的Sobel算子/边缘检测/FPGA
Key words
Mixed noise/Fast median filtering/Sobel operator in eight directions/Edge detection/FPGA
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