| # | Line 144 | Line 144 | compgamma() /* compute gamma correction map */ | |
|---|---|---|
| 144 | register int i, val; | |
| 145 | ||
| 146 | for (i = 0; i < 256; i++) { | |
| 147 | < | val = pow(i/256.0, 1.0/GAMMA) * 256.0; |
| 147 | > | val = pow((i+0.5)/256.0, 1.0/GAMMA) * 256.0; |
| 148 | if (val > 248) val = 248; | |
| 149 | gammamap[i] = val; | |
| 150 | } | |
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