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我的目标是获得给定的照片，其中包括黑色的左上部分和白色的右下部分。在照片中，可以清楚地看到，黑色（0）将是白色颜色（255），通过对角线以及x和y坐标。这是在matlab中通过数字图像处理完成的，但我不能100%得到它。1）你应该一张照片作为灰度照片（在代码grayImage2）.然后，你需要应用你的程序，以获得我上面提到的结果，以获得照片. 2）此外，我的灰度图像大小是400x400.你能帮我纠正代码？提前感谢.

[x,y,z]= size(grayImage2);

centerX2 = y;

centerY2 = x;

radius2 = 0;  % Change this value to set the desired radius

% Calculate the maximum radius from the center to the corners

maxRadius = sqrt((centerX2 - 1)^2 + (centerY2 - 1)^2);

% Iterate through the diagonal and change pixel values to gray tones

% Iterate through all pixels

for i = 1:x
     for j = 1:y
        if(j>=256)% because of being 400 for one edge for size 
          % Calculate the distance from the center to the current pixel  
          distance2 = sqrt((j - centerX2)^2 + (i - centerY2)^2);
          % Calculate the gray value based on the distance
          grayValue = uint8((distance2 / maxRadius) * (255-(400-j)));
          % Set the pixel to the calculated gray value
          grayImage2(i, j) = grayValue;
        else
          % Calculate the distance from the center to the current pixel
          distance2 = sqrt((j - centerX2)^2 + (i - centerY2)^2);
          % Calculate the gray value based on the distance
          grayValue = uint8((distance2 / maxRadius) * (255-(255-j+1)));
          % Set the pixel to the calculated gray value
          grayImage2(i, j) = grayValue;
        end
   end
end

figure;

% Display the grayscale image

imshow(grayImage2);

title('Grayscale Image with Radial Gradient');

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