how to use crop using coordinate?
pic=imread('b.jpg');[w, h, numberOfColorChannels] = size(pic);I=imcrop(pic,[w*0.5 h*0.5 20 20]);imshow(I)
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;format compact;fontSize = 20;sourceImage = imread('peppers.png');subplot(2, 2, 1);imshow(sourceImage);title('Original Image', 'FontSize', 20);% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);% Get rid of tool bar and pulldown menus that are along top of figure.
set(gcf, 'Toolbar', 'none', 'Menu', 'none');% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off') uiwait(msgbox('Draw a polygon. Double click to accept/finish it'));hPoly = impoly;polyPoints = hPoly.getPositionmask = hPoly.createMask;subplot(2, 2, 2);imshow(mask);title('Mask', 'FontSize', 20);croppedImage = sourceImage; % Initialize
% Set outside of polygon to black
croppedImage(~repmat(mask, 1, 1, 3)) = 0; x1 = round(min(polyPoints(:, 1)))x2 = round(max(polyPoints(:, 1)))y1 = round(min(polyPoints(:, 2)))y2 = round(max(polyPoints(:, 2)))% Do a rectangular crop
croppedImage = croppedImage(y1:y2, x1:x2, :);subplot(2, 2, 3);imshow(croppedImage);title('Cropped Image', 'FontSize', 20);
[rows, columns, numberOfColorChannels] = size(pic1)
Best Answer