File:Barns grand tetons HSV separation.jpg
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Size of this preview: 200 × 598 pixels. Other resolutions: 80 × 240 pixels | 160 × 480 pixels.
Original file (800 × 2,392 pixels, file size: 361 KB, MIME type: image/jpeg)
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| Description |
English: This takes an image (Image:Barns grand tetons.jpg) and displays the H, S and V elements of it.
Note that the H element is the only one displaying colour. Compare the dark on the left side of the barn roof and the white of the snow; in both cases these have colour, but the saturation is very low, causing them to be near-greyscale; the intensity of the barn is much lower than the snow. The green of the grass is highly saturated and of moderate intensity; the blue of the mountains is consistent in colour but varies in intensity and saturation; and the sky has constant colour and intensity but varying saturation.
Generator codeIn MATLAB: RGBimage = imread('barns_grand_tetons_reduced.jpg');
[height,width,depth]=size(RGBimage);
HSVimage=rgb2hsv(RGBimage);
% Caution: MATLAB's hsv2rgb routine is very memory-hungry. I had to halve
% the size of the source image to avoid running out or memory (even with
% a lot of swap space allocated).
% Newer versions of matlab need outputimage=zeros(height*4,width,depth,'double');
outputimage=double(zeros(height*4,width,depth));
for w=1:width,
for h=1:height,
outputimage(h,w,1) = HSVimage(h,w,1); %Copy H, S and V for normal image
outputimage(h,w,2) = HSVimage(h,w,2);
outputimage(h,w,3) = HSVimage(h,w,3);
outputimage(h+height,w,1) = HSVimage(h,w,1); %Copy H only for first component
outputimage(h+height,w,2) = 1;
outputimage(h+height,w,3) = 1;
outputimage(h+(2*height),w,2) = HSVimage(h,w,2); %S only for second component
outputimage(h+(2*height),w,1) = 1;
outputimage(h+(2*height),w,3) = 1;
outputimage(h+(3*height),w,3) = HSVimage(h,w,3); %V only for third component
outputimage(h+(3*height),w,1) = 1;
outputimage(h+(3*height),w,2) = 1;
end
end
im2=hsv2rgb(outputimage);
image(im2);
imwrite(im2,'HSV_separation.jpg','jpeg');
Based on the (public domain) photo Image:Barns grand tetons.jpg. Code above and resulting output by Mike1024. |
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| Date | 2 June 2006 (original upload date) | ||
| Source | Transferred from en.wikipedia to Commons. | ||
| Author | Mike1024 | ||
| Permission (Reusing this file) |
|
Original upload log
[edit]
The original description page was here. All following user names refer to en.wikipedia.
- 2006-06-02 17:47 Mike1024 800×2392×8 (369530 bytes) ==Summary== This takes an image ([[:Image:Barns grand tetons.jpg|Image:Barns grand tetons.jpg]]) and displays the H, S and V elements of it. Note that the H element is the only one displaying colour. Compare the dark on the left side of the barn roof and
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:19, 14 May 2007 | | 800 × 2,392 (361 KB) | Vaya (talk | contribs) | {{Information |Description=This takes an image (Image:Barns grand tetons.jpg) and displays the H, S and V elements of it. Note that the H element is the only one displaying colour. Compare the dark on the left side o |
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