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→Reviving my real HDR algorithm: 0.019607843, not 1.0196 |
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::1) <math>final.rgb=(1/255)^{1/(2-0.5)}/0.5=0.00392^{1/1.5}/0.5=0.02487/0.5=0.049735887;</math> or 12.68=13;
::2) <math>final.rgb=(1/255)/0.5=0.00392/0.5=0.007843137;</math> or 2.
::2.1) <math>final.rgb=(1/255)/0.2=0.00392/0.2=
:::Note, that algorithm, which using gamma don't matter if is combined with this "final.rgb=color.rgb/average" algorithm or not, still making contrast between say 128 and 64 instead normal 2:1, it making <math>0.2^{1/1.5}/0.1^{1/1.5}=1.5874:1</math> or bigger depending on "average" like <math>0.2^{1/1.25}/0.1^{1/1.25}=1.7411:1</math> instead normal 2:1. So this algorithm graying combined or not with with this "final.rgb=color.rgb/average". But graying all colours equally don't matter they strong or weak and contrast between all colours depending only on "average".
:::Compressed luminance algorithm "final.rgb=(2*color.rgb)/(1+color.rgb)" graying the same don't matter if used before or after this "final.rgb=color.rgb/average" algorithm or used alone. But it graying stronger colours more than weaker and contrast after this "final.rgb=(2*color.rgb)/(1+color.rgb)" algorithm between say 128 and 64 is smaller than between 20 and 10. For example [2*0.2/(1+0.2)]/[2*0.1/(1+0.1)]=[0.4/1.2]/[0.2/1.1]=[0.3333]/[0.1818]=1.83333, so contrast becoming 1.8333:1 after algorithm, compare with noraml 2:1 before algorithm (here was colours 0.1*255=25.5=26 and 0.2*255=51). And if colours are 128/255=0.5 and 64/255=0.25, then [2*0.5/(1+0.5)]/[2*0.25/(1+0.25)]=[1/1.5]/[0.5/1.25]=[0.6667]/[0.4]=1.6667, so contrast between 128 and 64 equal to 1.6667:1 instead normal 2:1. So you can imagine, that there small contrast between 255 and 128 (contrast after algorithm becoming 1.5:1, because [2*1/(1+1)]/[2*0.5/(1+0.5)]=[1]/[1/1.5]=[1]/[0.6667]=1.5).
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