Mercurial > repos > ImageTools / file comparison
comparison: src/ColourTools.jl
src/ColourTools.jl
- changeset 55
- 198108ecdab7
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| 54:471f9f64ff2d | 55:198108ecdab7 |
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| 1 | |
| 2 ############################################# | |
| 3 # Utilities to work with colourmapped images | |
| 4 ############################################# | |
| 5 | |
| 6 module ColourTools | |
| 7 | |
| 8 using ColorTypes: Gray | |
| 9 | |
| 10 # Our exports | |
| 11 | |
| 12 export grayimg, | |
| 13 mapped_img, | |
| 14 clip | |
| 15 | |
| 16 # Clip image values to allowed range | |
| 17 clip = x -> min(max(x, 0.0), 1.0) | |
| 18 | |
| 19 # Tell that raw image data is grayscale | |
| 20 grayimg = im -> Gray.(clip.(im)) | |
| 21 | |
| 22 # Apply a colourmap (vector of RGB objects) to raw image data | |
| 23 function mapped_img(im, cmap) | |
| 24 l = length(cmap) | |
| 25 apply = t -> cmap[1+round(UInt8, clip(t) * (l-1))] | |
| 26 return apply.(im) | |
| 27 end | |
| 28 | |
| 29 end | |
| 30 |
