I am trying for crop an image in to two equal parts using for loop but not getting correct ans.

clc; clear all; close all;

input= imread('120kv x1.25mA(56000)15cm.bmp'); figure(1),imshow(input); a=im2double(input); [x, y, z]=size(a);

 y1=round(y/2);

% new=a; for i=1:x; for j=1:z; for k=1:y1; new(x, y1, z)=a(x, y, z); end end end figure, imshow(new);

% new=a; for i=1:x; for j=1:z; for k=1:y1; new1(x,y1,z)=a(x, y1+1, z); end end end figure, imshow(new1);

Answer 1

[Image Analyst]

Don't use input as the name of your image because it's already the name of a built-in function. You don't need a for loop. Just use regular indexing:

[rows, columns, numberOfColorChannels] = size(rgbImage);
middleCol = floor(columns/2);
leftHalf = rgbImage(:, 1:middleCol, :);
rightHalf = rgbImage(:, (middleCol+1):end, :);

[Durgesh Naik]

thanks, but actually i want to crop image equally for image registration, this is not working correctly for image registration.

[Image Analyst]

You said you want to "crop an image in to two equal parts" and didn't say anything about registration. Look up registration in the help for several functions that do that in the Image Processing Toolbox.

[Durgesh Naik]

Is it possible to crop image using for loop?

[Image Analyst]

Yes, but you wouldn't want to do that.