How can I perform histogram equalization on separated H, S, V components?

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Vishnu R
Vishnu R 2015-10-14
评论： MemonMohsi 2019-2-19
I have an hsv image. And I splitted the hsv image into separate h, s, v components.. I want to perform a histogram equalization on these h,s, v components.. What should I do?
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Varun Pai
Varun Pai 2015-10-15
I think you have misunderstood the concept of HSV images. You can only convert an RGB image to HSV using rgb2hsv(). These matrices are MxNx3 matrices (ie 3 layers) each layer representing Hue, Saturation and Value.
Vishnu R
Vishnu R 2015-10-16
Sir, no V component means...when my image is converted into hsv image. Iget only a purely white image...that does not implies it has no V component

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Varun Pai
Varun Pai 2015-10-14
Dear Vishnu,
histogram equalization of the 'Hue' and 'Saturation' component is not recommended, because these two factors holds the color information of the image. You can do the Histogram equalization on the 'Value' component. Later combine them together.
Once you get H,S,V separately, V is just a MxN grayscale image. You can use histeq() function. Please see link for more information. http://in.mathworks.com/help/images/ref/histeq.html
V_hist = histeq(V);
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MemonMohsi
MemonMohsi 2019-2-19
Dear Varun/Vishnu,
can you guide me after histogram equalization of V as mentioned in answer how do I combine that equalization value to my RGB image so that i can imshow my RGB image with improved contrast?

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