Legacy ImageMagick Discussions Archive

The sigmoidal transform you suggested makes the image look pretty much like what my HDR TV shows, so the washed-out look isn't an artistic choice, I'm afraid. :-) I don't have the original HDR data available in my setup, which is the major problem I'm having. If I had access to the HDR stream, there ...

Thanks! That looks pretty good. :-) But since the image originated from something that's been through SMPTE ST 2084, and which has then been truncated down do 8-bit sRGB (which is what I assume that the capture box has done), is there a way to do an... inverse 2084? I mean, bits have been lost, so ...

Yeah, the img_53.jpg is not an HDR10 image -- the HDMI capture box has created a normal 8-bit sRGB image based on the HDR10 that was output by the source. So it's not really a question of how to convert an HDR10 image per se -- but how to convert these SDR images back to something that looks ...

I've got an external HDMI screenshotting box which works fine... except when the source is playing UHD HDR, in which case everything becomes very washed out. For instance: http://quimby.gnus.org/s/img_53.jpg Now, that's to be expected, because the capture box doesn't do HDR, so it just... er ...