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It's a good generalization of several techniques. The main thing I want to know is this: how does it look with actual HDR exposures, not the synthetic ones made

by herf 2y ago

It's a good generalization of several techniques. The main thing I want to know is this: how does it look with actual HDR exposures, not the synthetic ones made by "increasing exposure and colorfulness significantly"? We shouldn't choose a method based on how natural the result is, when there is a "stretching" step like this that is not at all natural.

pixelpoet 2y ago
OMG, it's Mike Herf! I even linked your "give me a gigabyte" article randomly yesterday to someone complaining of an application using 1gb on his 64gb machine, and remember most of your website off by heart still, in particular the soft shadows / roundrects, all the way to random funny things like SreeD :) Thanks so much for the great articles <3
jacobolus 2y ago
I think any kind of hard clipping approach which takes each pixel independently is going to necessarily create some significant artifacts, though as the examples here make clear, some directions of clipping work better than others. The most important part to preserve for the image to look reasonable is lightness contrast, as when it gets crunched away the image loses visible detail, and the better methods demonstrated in this post manage to save at least some lightness contrast. But all of the methods here end up blowing out / compressing away chroma contrast in some regions where it existed in the original image. What I'd like to see someone try is do is record the relative lightness and chroma, and (adaptation/context dependent) color relationships from the original image, and then try to preserve those to the extent practical even when bringing out-of-gamut colors into gamut. This will necessarily require modifying in-gamut colors to some extent as well. This is what good Photoshop users do when they manually adjust the color of an image from one display medium to another, but it involves some amount of careful conscious choice and skill.

by herf 2y ago

pixelpoet 2y ago

OMG, it's Mike Herf! I even linked your "give me a gigabyte" article randomly yesterday to someone complaining of an application using 1gb on his 64gb machine, and remember most of your website off by heart still, in particular the soft shadows / roundrects, all the way to random funny things like SreeD :) Thanks so much for the great articles <3

jacobolus 2y ago

I think any kind of hard clipping approach which takes each pixel independently is going to necessarily create some significant artifacts, though as the examples here make clear, some directions of clipping work better than others. The most important part to preserve for the image to look reasonable is lightness contrast, as when it gets crunched away the image loses visible detail, and the better methods demonstrated in this post manage to save at least some lightness contrast. But all of the methods here end up blowing out / compressing away chroma contrast in some regions where it existed in the original image. What I'd like to see someone try is do is record the relative lightness and chroma, and (adaptation/context dependent) color relationships from the original image, and then try to preserve those to the extent practical even when bringing out-of-gamut colors into gamut. This will necessarily require modifying in-gamut colors to some extent as well. This is what good Photoshop users do when they manually adjust the color of an image from one display medium to another, but it involves some amount of careful conscious choice and skill.