how to change the background in imshow from black to white

Question

Houghton 2015-8-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/234679-how-to-change-the-background-in-imshow-from-black-to-white

评论： Image Analyst 2020-8-22

get(0,'Factory');
set(0,'defaultfigurecolor',[1 1 1]);
whitebg(figure);
set(gcf,'color','white');
set(gca,'color','none');
figure; clf;
imshow(pairOfImages);

The result is this

I want a result that shows the pyramid with a white background.

Thanks

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Morteza 2015-8-19

编辑：Morteza 2015-8-19

in fact by counting the number of repeated item you can consider what color is dominated by background color and set the new color as user specify it like input and then set new background color. write GUI to analyze it and do the rest...

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Answer 1

Morteza 2015-8-19

1
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https://ww2.mathworks.cn/matlabcentral/answers/234679-how-to-change-the-background-in-imshow-from-black-to-white#answer_189774

编辑：Morteza 2015-8-19

在 MATLAB Online 中打开

try this save your picture like Untitled.png on your desktop and then call it from MATLAB like below:

clc,clear all
A = imread('C:\Users\MORTEZA\Desktop\Untitled0.png');
figure(1)
image(A)
[L,W,D] = size(A);
for i = 1:L
  for j = 1:W
      for k = 1:D
          if A(i,j,k) == 0
              A(i,j,k) = 255;
          end
      end
  end
end
figure(2)
image(A)

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Keerthi D 2020-6-29

编辑：Image Analyst 2020-8-22

在 MATLAB Online 中打开

Sir I tried your code above, but I didn't get.

A=imread('C:\Users\Keerthi Dev\Desktop\matlabwork\seg1.png');
figure(1)
image(A)
[L,W,D] = size(A);
for i = 1:L
   for j = 1:W
       for k = 1:D
           if A(i,j,k) == 0
               A(i,j,k) = 255;
           end
       end
   end
end
figure(2)
image(A)

result is:

Sir, please help me to solve my problem

Image Analyst 2020-8-22

Sure, but please post it in a new post, not tacked onto a 5 years old post from someone else.

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Answer 2

hf fh 2018-9-19

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/234679-how-to-change-the-background-in-imshow-from-black-to-white#answer_337515

I have a grayscale image, Please help me I have a picture and I want to make the background color white I used the previous method but did not good out with me