How to convert a HSV image into gray image????

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user06
user06 2016-6-17
评论： Image Analyst 2017-6-7
i have a rgb image that i have converted into HSv image and applied some filter on that, now i have to convert that filtered HSV image into gray image.

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回答（3 个）

KSSV
KSSV 2016-6-17
  2 个评论
user06
user06 2016-6-17
RGB=reshape(ones(64,1)*reshape(jet(64),1,192),[64,64,3]); by this we only get the bands of R G B i want to recover the image as it is.

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Image Analyst
Image Analyst 2016-6-17
Use rgb2gray:
hsvImage = rgb2hsv(rgbImage);
% Now do some computations on the HSV image.
% Now convert back to RGB
rgbImage2 = hsv2rgb(hsvImage);
% Convert to gray scale
grayImage = rgb2gray(rgbImage2);
kautsar rusydi
kautsar rusydi 2017-6-7
a=imread(img);
b=rgb2hsv(a);
c=a(:,:,3);
  1 个评论
Image Analyst
Image Analyst 2017-6-7
That totally ignores the hsv image, and just sets c equal to the blue channel of the original RGB image.

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