To divide an image into 2 equal halves

Question

keerthi 2012-9-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49166-to-divide-an-image-into-2-equal-halves

评论： mariena aloor 2019-9-10

I wrote the code for it . I can divide the left side of an image and while doing for the right side left part of it is black and right part is the second half of the image . The problem where i am facing is , in the 2nd for loop it starts with k=1 n m=110 so for others column values from 1 to 109 as a default its taking zero. How to sort out this problem.

    % code
x=imread('img1.jpg');
image=rgb2gray(x);
[q r]=size(image);
s=r/2;
for i=1:q
    for j=1:s
        n1(i,j)=image(i,j);
    end
end
for k=1:q
    for m=s:r
        n2(k,m)=image(k,m);
    end
end
imshow(n1)
figure
imshow(n2)
  end

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Durgesh Naik 2015-4-3

till not working

Image Analyst 2015-4-3

How do you know? Did you ask keerthi? He accepted the answer so I would assume that it is working.

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Answer 1

Walter Roberson 2012-9-26

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49166-to-divide-an-image-into-2-equal-halves#answer_60081

在 MATLAB Online 中打开

n1 = image(:, 1 : end/2);
n2 = image(:, end/2+1 : end );

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Image Analyst 2013-10-12

编辑：Image Analyst 2013-10-13

Well . . . what is the name of your variable? I really really doubt it's called image - at least it shouldn't be. So you need to use the actual name of your image array variable. What is it? Let's say it's called grayImage. Then use grayImage(....) instead of image(....)

Jaya Darshini N K 2019-2-11

i have tried this and this is working perfectly. but images ni and n2 are displaying along with the full image. i want only n1 and n2 to be displayed.

thanks in advance!!!

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