pfstmo_pattanaik00(1)

💖 pfstmo_pattanaik00(1) — the Time-dependent Visual Adaptation Model, bestie edition 💖

okay so. gather round. this is pfstmo_pattanaik00, a lil command from the General Commands Manual, and it is genuinely one of the coolest tone mappers out there. it's giving science + vibes. let's get into it 🦋

✨ NAME ✨

pfstmo_pattanaik00 — Time-dependent Visual Adaptation Model. that's the whole name, no notes, she ate.

🌸 SYNOPSIS 🌸

pfstmo_pattanaik00 [--time-dependence] [--fps <val>] [--mul
<multiplier>] [--local] [--cone <val>] [--rod <val>] [--verbose]
[--help]

👑 DESCRIPTION 👑

this command implements a tone mapping operator as described in:

Time-Dependent Visual Adaptation for Realistic Image Display. S.N. Pattanaik, J. Tumblin, H. Yee, and D.P. Greenberg. In Proceedings of ACM SIGGRAPH 2000.

🚨 real talk: this operator requires properly calibrated image data (in cd/m2) and its results should be gamma corrected. don't skip that part bestie, i'm begging 😭

the local version of this operator is based on the following paper:

Adaptive Gain Control For High Dynamic Range Image Display. S.N. Pattanaik, H. Yee. In proceedings of SCCG 2002.

💅 OPTIONS 💅

• --time-dependence, -t — use the time dependent model of adaptation. this is the one you want for tone mapping an animation. heads up tho: it has no influence on single-frame input. switched off by default. ⭐ Note: it is important to correctly set the speed of the input animation (--fps). like, important important.
• --fps <val>, -f <val> — the speed of the input animation, in frames per second. used when time-dependence is switched on (-t). default value: 16.0. 🎀
• --mul <multiplier>, -m <multiplier> — multiply input values by a multiplier value. super useful if your input data is not calibrated. default value: 1.0.
• --local, -l — use the local version of the tone mapping. lowkey a plot twist: time-dependent effects are cancelled while using the local version, and the global version is used by default.
• --cone <val>, -c <val> — set the adaptation level for cones. and if you don't use the --rod parameter, this will also set the adaptation level for rods. by default, the adaptation level is calculated as a logarithmic average of luminance in the input image. 🧚
• --rod <val>, -r <val> — set the adaptation level for rods. by default, the adaptation level is calculated as a logarithmic average of luminance in the input image.
• --verbose — print additional information during program execution. she's chatty and we love her for it 💬
• --help — print list of command line options. classic. iconic. always there for you 🫶

🌈 EXAMPLES 🌈

tone map image, apply gamma correction, and save it in png format:

pfsin memorial.hdr | pfstmo_pattanaik00 -m 650 | pfsgamma -g 2.2 | pfsout memorial.png

look at that pipeline. no cap, that's a whole glow-up in one line. 🔥

🦋 SEE ALSO 🦋

pfsgamma(1) pfsin(1) pfsout(1) pfsview(1)

💀 BUGS 💀

please report bugs and comments on implementation to Grzegorz Krawczyk <krawczyk@mpi-sb.mpg.de>. be nice, be specific, include the details. periodt. 🙈

that's the whole page, bestie 💖 this was pfstmo_pattanaik00(1) from the General Commands Manual — go forth, tone map responsibly, and remember to gamma correct. mwah 💅✨