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Is it always necessary to convert image to double type before further execution?
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Hi,
I want to threshold an image. I can read the image and it is a byte type (UINT 8). I want to pass this image to another function as it is but it asks me to convert to double before I can pass to another function where threshold is performed via MEX MATLAB. How can I pass the image as the same data type? Thanks in advance.
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Answers (2)
Walter Roberson
on 2 Oct 2013
We don't know. You will need to tell us which function you are trying to pass it to.
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Image Analyst
on 2 Oct 2013
Well apparently you can't. It said so. It said it wanted double and rejected your call when you tried to pass in uint8(). I don't know why, but that's the way it is. It seems like it could just cast it to double internally, but, for whatever reason, it doesn't. So I guess you have to live with it. Either use double() if it can take whatever range you have, or use im2double() if it wants it in the 0-1 range.
6 Comments
Jan
on 8 Oct 2013
Edited: Jan
on 8 Oct 2013
@Krishna: This is not Matlab. We do not know: getData_Image function, type and size of "image", value or "rows" and "cols", size and type of "matlab_image" and why you use 1-based indexing here. So currently there is no chance to guess, what you are doing.
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