Why image appear black and white image?
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i convert 3 d image to 2 d image. Then I have used the imwrite function. But image was appeared the black and white image. Why?
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Image Analyst
on 9 Oct 2020
What is the class of (the poorly-named) c? Is it double or uint8 or uint16?
You forgot to attach your file so we can't run your code.
You need to put v.jpg in single quotes otherwise it will think that v is a structure and the jpg field of that structure is a character array, which is not what I think it is.
imwrite(c, 'v.jpg');
Do not use JPG for image analysis - it introduces bad compression artifacts. Use PNG format instead.
imwrite(c, 'v.png');
What does this show in the command window
whos a
whos b
whos c
Rik
on 9 Oct 2020
"Do not use JPG for image analysis - it introduces bad compression artifacts. Use PNG format instead."
I whole-heartedly agree, but in medical imaging it appears to be common to convert perfectly good 12 bit precision DICOM files to JPEG. I don't understand why, but that seems to be the standard. Judging by the use of niftiread I assume this is a medical purpose as well, meaning this might just be conforming with the input requirements of the next step in the pipeline.
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