Matlab-梯度法实现图像边缘检测

数字图像处理-基础实验-梯度法实现边缘检测

Problem Statement

Edge detection is a problem of fundamental importance in image analysis. In typical images, edges characterize object boundaries and are therefore useful for segmentation, registration, and identification of objects in a scene.Use gradient to realize image edge detection.

Procedure

(A)Gradient :

(B)Step:
(1) Save the original picture I
(2) Define a 0 matrix I2 to store gradient images
(3) Use the gradient formula to calculate the gradient image
(4) Get negative image

Source code

A=imread('F:\cxy_m\1.png');
I=A;
I2=A;

subplot(1,3,1),imshow(A);
[m,n]=size(A);

for x=1:m
    for y=1:n
        I2(x,y)=0;
    end
end

fo