exrpptm(1)

🎀 NAME 🎀

okay so bestie, welcome to the exrpptm(1) page — it's from the General Commands Manual, and the whole vibe is this: exrpptm performs tone mapping on an OpenEXR image (photoreceptor) ✨. that's the main-character tool we're talking about, no cap.

✨ SYNOPSIS ✨

exrpptm [options] input.exr output.exr

🦋 DESCRIPTION 🦋

exrpptm performs the tone mapping function described in this paper, periodt:

Erik Reinhard and Kate Devlin. Dynamic Range Reduction Inspired by Photoreceptor Physiology. IEEE Transactions on Visualization and Computer Graphics (2004).

Your input image should be normalized, and the output file returned by this function should also be normalized before viewing — literally normalize both sides so the vibe check is valid 💖.

💅 OPTIONS 💅

• -f — controls the intensity of the resulting image. Valid range is from -8 to 8, defaulting to 0. turn the intensity up or down, bestie, but stay in range.
• -m — controls the contrast of the resulting image. Valid range is from 0.3 to 1.0. The default value of 0 uses an algorithm to calculate an appropriate m factor for the image based on its luminance — so 0 is the special “let the algorithm cook” setting 👑.
• -c — amount of chromatic adaptation to apply to the image. Valid range is from 0 meaning no chromatic adaptation to 1 meaning fully adapted. Defaults to 0.
• -a — controls the light adaptation. Valid range is from 0 meaning that the adaptation is global to 1 meaning that the adaptation is based on pixel intensity. Defaults to 1, to trade detail visibility for contrast.

👑 AUTHORS 👑

The author is Billy Biggs <vektor@dumbterm.net>. — iconic, honestly 🫶.

🌈 SEE ALSO 🌈

• exrtools(1) — go peek at that one too, iykyk.

okay bestie, that's the whole page 💖 it's from exrtools 0.4, dated December 2003, and yes this is still the exrpptm(1) manual — periodt 🫶