Resize image without change aspect ratio of that image

Question

Malan Jayanka 2016-7-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/293524-resize-image-without-change-aspect-ratio-of-that-image

评论： Malan Jayanka 2016-7-3

I have leaf image which got by scan real leaf. I want to reduce the dimensions of that image without change aspect ratio of the image. And it is not necessary to fit to given dimension. It can be used padding also. Simply I want to reduce image size to 256*256 and doesn't change aspect ratio of it. how to do this?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2016-7-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/293524-resize-image-without-change-aspect-ratio-of-that-image#answer_227504

在 MATLAB Online 中打开

%figure out the pad value to pad to white
if isinteger(YourImage)
   pad = intmax(class(YourImage));
else
   pad = 1;   %white for floating point is 1.0
end
%figure out which dimension is longer and rescale that to be the 256
%and pad the shorter one to 256
[r, c, ~] = size(YourImage)
if r > c
  newImage = imresize(YourImage, 256 / r);
  NewImage(:, end+1 : 256, :) = pad;
elseif c > r
  newImage = imresize(YourImage, 256 / c);
  NewImage(end+1 : 256, :, :) = pad;
else
  newImage = imresize(YourImage, [256, 256]);
end