exrnlm(1)

🎀 NAME 🎀

okay so this is the iconic exrnlm(1) page from the General Commands Manual — and it literally performs non-linear masking correction on an OpenEXR image. That’s the vibe. ✨

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🦋 SYNOPSIS 🦋

the group chat command is:

exrnlm input.exr blur.exr output.exr

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🌸 DESCRIPTION 🌸

exrnlm performs the non-linear masking function described in this paper, no cap:

N. Moroney. Local Color Correction Using Non-Linear Masking. IS&T 8th Color Imaging Conference, 108-111 (2000).

bestie, important: the input image should be normalized, and the whitepoint image should be at the same scale factor as the input image. That’s the rule, periodt. 💅

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👑 AUTHORS 👑

• Billy Biggs <vektor@dumbterm.net>.

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💜 SEE ALSO 💜

• exrtools(1).

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catch you later, bestie — this lil page is from exrtools 0.4, dated December 2003. 🫶💖