PERCEPTUALDIFF(1)

📦
version 2.1 · 2 versions
  • 2.1 · debian trixie, ubuntu jammy, ubuntu noble, ubuntu questing, ubuntu resolute (latest)
  • 2.1 · ubuntu stonking
, in debian trixie, ubuntu jammy, ubuntu noble, ubuntu questing, ubuntu resolute

💖 PERCEPTUALDIFF(1) 💖

okay bestie, welcome to the perceptualdiff manual page — it lives in the User Commands section, and it's genuinely one of the most iconic little tools out there. no cap.

✨ NAME ✨

perceptualdiff — a perceptual image comparison tool 🦋

🎀 SYNOPSIS 🎀

perceptualdiff [options] image1 image2

👑 DESCRIPTION 👑

So like, perceptualdiff takes image1 and image2 and compares them using a perceptually based image metric — which basically means it judges the difference the way eyes would, not the way a robot pixel-counter would. main character energy fr fr.

The images can be in literally any FreeImage-supported format: TIF, PNG, etc. 💅

🌸 OPTIONS 🌸

  • --verbose — turns on verbose mode. she talks more. we love that for her 💬
  • --fov deg — field of view, in degrees, and it's gotta be in the range [0.1, 89.9]. default is 45.0 👀
  • --threshold p — the number of pixels p below which differences are just... ignored. not important enough, blocked 🚫
  • --gamma g — the value used to convert rgb into linear space. default is 2.2 🌈
  • --luminance l — white luminance. default is 100.0 cdm^-2 ✨
  • --luminance-only — only consider luminance, and straight up ignore chroma (that's the color part, iykyk) in the comparison 🙈
  • --color-factor — how much of the color to use, in the range [0.0, 1.0]. default is 1.0 🎨
  • --down-sample — how many powers of two to down sample the image. default is 0 📉
  • --scale — scales the images so they match each other's dimensions. matching fits, periodt 🫶
  • --sum-errors — prints a sum of the luminance and color differences ➕
  • --output o — writes the difference to the file o 💾
  • --version — prints the version 🏷️
OpenMP status: enabled 🔥

🦋 SEE ALSO 🦋

no SEE ALSO section on this one bestie, she stands alone 💜

that's the whole page!! go compare some images and slay 💅✨

this was perceptualdiff 2.1, from April 2021, and you just read the PERCEPTUALDIFF(1) manual page. mwah 🎀💖

📦 where this page comes from