Three-point confirmation center in MATLAB

Clear all; close all; clc;
IMG = imread ('e: \ 4.jpg ');
Subplot (121); imshow (IMG );
[X y] = size (IMG); % calculate the pixel size! X = 243, y = 1026
IMG = double (IMG); % convert IMG to double type

% Sobel Edge Detection
W = fspecial ('job'); % specifies the filter type 'job'
Img_w = imfilter (IMG, W, 'replicate'); % calculates the horizontal edge
W = W ';
Img_h = imfilter (IMG, W, 'replicate'); % calculates the vertical edge
IMG = SQRT (img_w. ^ 2 + img_h. ^ 2); % pay attention to the sum of squares in the square
Subplot (122); imshow (uint8 (IMG ))

Impixelinfo;
A = ginput (3 );
P = (A (1) + a (2) + a (3)/3;
Q = (A (4) + a (5) + a (6)/3;
Hold on;
Plot (p, q ,'*');
[P, q] % particle Coordinate

 

Three-point confirmation center in MATLAB