How to get the original rgb image from hsv image?

Question

Kumar Arindam Singh 2017-4-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/334469-how-to-get-the-original-rgb-image-from-hsv-image

评论： Image Analyst 2017-4-9

采纳的回答： Image Analyst

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OK, so I have this image(in HSV) which i have got after cropping:

Now,I want to implement the same dimension cropping(i.e. the image width and height should be same as the above image) to my original(uncropped)rgb image,which is:

I used the following code

img1=imread('2.jpg');%this is the original rgb image
[y1,x1] = find(img1); 
xmin1 = min(x1(:));
ymin1 = min(y1(:));
xmax1= max(x1(:));
ymax1 = max(y1(:));
width1=xmax1-xmin1+1;
height1=ymax1-ymin1+1;
img2=imread('cropbin1.jpg');%this is the HSV image
[y2,x2] = find(img2); 
xmin2 = min(x2(:));
ymin2 = min(y2(:));
xmax2= max(x2(:));
ymax2 = max(y2(:));
width2=xmax2-xmin2+1;
height2=ymax1-ymin2+1;
w3=(width1-width2)/2;
h3=(height1-height2)/2;
out = imcrop(img1,[w3 h3 width2 height2]);
figure,imshow(out);

But, to my horror, the output is showing no image.

Please help.

I would like my original image to be like:

Please suggest any other way by which I can change the HSV image to a rgb image. Thanxxx.......

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Image Analyst 2017-4-9

There are so many things wrong with that code, that it's just faster to give you whole new code than to explain it to you. In the meantime, I fixed your formatting but for the future, please read this: http://www.mathworks.com/matlabcentral/answers/13205#answer_18099

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Answer 1

Image Analyst 2017-4-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/334469-how-to-get-the-original-rgb-image-from-hsv-image#answer_262362

test.m

See attached solution.

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Kumar Arindam Singh 2017-4-9

instead of find(), i used size() and the code worked for all the test images.... i will definitely check your asnwer...thank u

Image Analyst 2017-4-9

Not it won't. Just look at it:

xmin1 = min(x1(:));

well x1 is the number of columns multiplied by the number of color channels (3). Why? Just read http://blogs.mathworks.com/steve/2011/03/22/too-much-information-about-the-size-function/ So x1 is 12,960, NOT the number of columns in the image. It's not even an array, so doing this: x1(:) will not do what you thought it did. Lots more problems after that.

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