Crop image without change aspect ration of original image
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I want to do these kind of conversion. Output image must be 256*256 pixel. I want to crop image and remain the main leaf part in the output image without change the aspect ratio of original image. Is this possible in matlab?
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Walter Roberson
2016-10-9
imcrop() and pass a rectangle whose width and height are 256, 256. A section that size will be extracted. The pixel sizes will not have changed, so the aspect ratio of the extracted area will be 1:1 . If you are displaying it afterwards, give the command
axis equal
or
axis image
You do not even need imcrop for this purpose: you can do it by plain array indexing
Extracted = YourImage(First_row : First_row + 255, First_column : First_column + 255, :);
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Image Analyst
2016-10-9
Then that portion is not 256x256 - it's bigger. So crop out a bigger portion, then use imresize() to shrink it down.
croppedImage = imcrop(rgbImage,map,[2000 1000 512 512]);
croppedImage = imresize(croppedImage, [256,256]);
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