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How to create image from a matrix?

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Boni_Pl
Boni_Pl 2019-8-30
评论： Image Analyst 2019-8-31
Hello, I have an matrix whose dimension is 101x4032 double. Now how can I see the image using imshow function? Please help me.

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回答（2 个）

Image Analyst
Image Analyst 2019-8-30
If m is your double matrix, use
imshow(m, []);
This works for any range of m - it doesn't have to be in the 0-1 range. Though if it already is in the 0-1 range, then you can omit the [] input argument to imshow().
  2 个评论
Boni_Pl
Boni_Pl 2019-8-31
Sir Can I make this matrix as square matrix such as 500x500?
Image Analyst
Image Analyst 2019-8-31
You can use imresize():
resizedImage = imresize(originalImage, [500, 500]);
though be aware that there will be a different number of pixels in the new matrix and they won't have exactly the same values though they may be close.

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Star Strider
Star Strider 2019-8-30
Try this:
A = randn(101,4032); % Create Matrix
B = uint8(A);
figure
imshow(B,[])
There are likely better ways to display your matrix, such as image or imagesc.
  2 个评论
Image Analyst
Image Analyst 2019-8-30
Why might those be likely to be better? I never use those instead of imshow().
Star Strider
Star Strider 2019-8-31
You cannot reshape your matrix into a square matrix.

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