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Hi! Question about image processing.
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So I have here different retinal images and they all have different 'contrast'. What can I do to make these images have the same 'intensity' or 'contrast' or 'appearance' between them. Is there a way where for example an image seems dark, it will be contrasted to a lighter image and if it's a light image, it will be contrasted the other way around?
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Image Analyst
il 9 Ago 2014
Modificato: Image Analyst
il 9 Ago 2014
You can try histogram matching like this algorithm: http://www.eyemaginary.com/Portfolio/ColorHistogramWarp.html
The Image Processing Toolbox also has a imhistmatch() function in it. I also have a histogram matching routine in my File Exchange http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 where you can make the histogram be any shape you like, for example below I make the histogram be the shape of the girl's silhouette:
![](https://www.mathworks.com/matlabcentral/images/broken_image.png)
Or you can play around with imadjust().
You might also look into HDR, High Dynamic Range Imaging.
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Image Analyst
il 15 Ago 2014
Sorry, I'd like to have the Grundland algorithm in MATLAB code but I don't. If you code it up, please put it on the File Exchange. It is the best color histogram matching algorithm I've seen.
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