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| View Original: | Barns grand tetons HSV separation.jpg (800x2392) | |||
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| Keywords: Barns grand tetons HSV separation.jpg 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 <pre>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' ;</pre> Based on the public domain photo Image Barns grand tetons jpg Code above and resulting output by Mike1024 en wikipedia 2006-06-02 Mike1024 original upload log page en wikipedia Barns_grand_tetons_HSV_separation jpg 2006-06-02 17 47 Mike1024 800×2392×8 369530 bytes <nowiki> Summary 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</nowiki> HSV John Moulton barn | ||||
