How to improve resolution of CT image?

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Kavitha Srinivasan
Kavitha Srinivasan 2012-11-7
评论： Walter Roberson 2019-5-29
Hi all
I want to improve the resolution of the CT images. Is there any filter that could improve the low-contrast resolution of medical CT images? I am working in Matlab. There are lots of filters for denoising. However, if the images are completely free of noise, the resolution also goes down. So I would like to go for filters that increases the resolution of the image. Your support will be much appreciated.
Thanks

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Walter Roberson
Walter Roberson 2012-11-7
No, you cannot improve the resolution of an image without extra information about what "should" be there. You are asking to do the equivalent of violating the Nyquist frequency.
You might be able to convert the information that is in the signal into a form more usable for further processing, but that would not involve increasing the resolution.
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Bjorn Gustavsson
Bjorn Gustavsson 2019-5-29
When displaying image modify the gray-scale level with the caxis command?
If this is a case of nonuniform illumination effects one could try a homomorphic
transform - I've never gotten any improvements on my data with that one but
it is mentioned in introductory textbooks so perhaps someone can have a use for it.
Walter Roberson
Walter Roberson 2019-5-29
Use the image contrast adjustment function to see where your interesting data is.

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