File:Barns grand tetons HSV separation.jpg

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Original file(800 × 2,392 pixels, file size: 361 KB, MIME type: image/jpeg)

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 code

In 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.
Date 2 June 2006 (original upload date)
Source Transferred from en.wikipedia to Commons.
Author Mike1024
Permission
(Reusing this file)
Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

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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2 June 2006

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369,530 byte

2,392 pixel

800 pixel

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Date/TimeThumbnailDimensionsUserComment
current10:19, 14 May 2007Thumbnail for version as of 10:19, 14 May 2007800 × 2,392 (361 KB)Vaya{{Information |Description=This takes an image ([[:en::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 o
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