Application of Improved Sobel Algorithm in Medical Image Edge Detection
Dehai Shen, Xu E, Long Chang Zhang · Applied Mechanics and Materials · 2014
Edge detection plays an important role in medical image processing; its accuracy directly affects the diagnosis and treatment of the disease. In view of the shortcomings of the traditional Sobel algorithm, an improved Sobel edge detection algorithm is proposed in this paper. Algorithm increased 135 º and 45 º direction templates, used the local gradient and standard deviation to filter and strengthen the gradient of initial gradient image. Experiments show that the image edge detected by the new algorithm is relatively accurate, complete and clear compared with the traditional Sobel algorithm, which verifies the effectiveness of the new algorithm.