Summation problem while lopping of an image

Question

Nimit Jain 2016-6-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/292949-summation-problem-while-lopping-of-an-image

评论： Nimit Jain 2016-6-29

close all
clear all
a = imread('lena.tif');
figure, imshow(a);
[r,c] = size(a);
sum = 0;
fileID = fopen('exp.txt','w');
fileID1 = fopen('totalValue.txt', 'w');
for i=1:r
    for j=1:c
        value = a(i,j);
        sum = sum + value;
        fprintf(fileID,'%d\n', value);
        fprintf(fileID1, '%d\n' , sum);
        disp(a(i,j));
    end
end
fclose(fileID);
fclose(fileID1);

Total some coming is 255. I am trying to get the per pixel value. Image size is 255x255.

Please help.

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Answer 1

Walter Roberson 2016-6-29

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/292949-summation-problem-while-lopping-of-an-image#answer_227128

在 MATLAB Online 中打开

value = double( a(i,j) );

and please rename your variable sum as you are interfering with the use of the important function sum which is likely to cause you problems as you keep developing your program (including the problem that it confuses the people you are asking to read your code.)