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What is HDR, anyway?

(www.lux.camera)
791 points _kush | 1 comments | 14 May 25 12:46 UTC | HN request time: 0.346s | source
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mightysashiman ◴[14 May 25 19:20 UTC] No.43988239[source]▶
I have a question: how can I print HDR? Is there any HDR printer + paper + display lighting setup?

My hypothesis are the following:

- Increase display lighting to increase peak white point + use a black ink able to absorb more light (can Vantablack-style pigments be made into ink?) => increase dynamic range of a printable picture

- Alternatively, have the display lighting include visible light + invisible UV light, and have the printed picture include an invisible layer of UV ink that shines white : the pattern printed in invisible UV-ink would be the "gain map" to increase the peak brightness past incident visible light into HDR range.

What do you folks think?

replies(2): >>43989074 #>>43992368 #
1. grumbel ◴[15 May 25 06:28 UTC] No.43992368[source]▶
Use projection mapping, instead of lighting the photo uniformly, use a projector and project a copy of the image onto the photo, thus you get detailed control over how much light the parts of the image receive.

Alternatively, use transparent film and a bright backlight.