How to convert gray image to HSV plane V - value image?
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Hi,
Given my image is a gray image and i don't have the rgb image of this gray image, can i know how can i convert this gray image to the HSV colour plane V - value plane image only?
The gray image and the value plane image looks quite similar but actually their values are quite different so if anyone have any idea on this, please let me know about the possibility.
Thank you in advance.
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Walter Roberson
2016-11-14
I used
cam = imread('cameraman.tif');
HSV = cat(3, zeros(size(cam)), zeros(size(cam)), double(cam)./255);
RGB = hsv2rgb(HSV);
imshow(RGB)
It seems to have worked
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Walter Roberson
2016-11-15
I am certain that there is no formula to convert between the two methods.
As for testing which method had been used: good question. I do not have an answer for that at this time. I notice that they have different distribution statistics, but I do not know yet how that could be taken advantage of.
If you happened to know that an area was originally bright blue, then if the area shows up bright then the HSV method has been used; if the area shows up dark then the rgb2gray method has been used.
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