ColorCalc

ColorCalc is a small Tkinter tool for analysing colour ranges in images. You load a picture, pick or click a reference colour, adjust hue/saturation/value sliders, and the app marks matching pixels while showing quick stats.

Features

• Two synced previews (original + overlay)
• Hue/Sat/Value sliders with presets and image colour picker
• Exclusion rectangles to ignore regions
• Theme toggle (light/dark) with rounded toolbar buttons
• Quick overlay export (PNG) and optional defaults via config.toml

Requirements

• Python 3.11+ (3.10 works with tomli)
• uv for dependency management
• Tkinter (install separately on some Linux distros)

Setup with uv

git clone https://github.com/<your-org>/ColorCalc.git
cd ColorCalc
uv venv
source .venv/bin/activate         # Windows: .venv\Scripts\activate
uv pip sync                       # installs Pillow + optional deps from pyproject
uv run colorcalc                  # launches the GUI

To include the optional ttkbootstrap theme pack:

uv pip install '.[ui]'

Workflow

1. Load an image (📂).
2. Pick a colour (🎨 dialog, 🖱️ image click, or preset swatch).
3. Fine‑tune sliders; watch the overlay update on the right.
4. Draw exclusions with right drag; reset or save when ready.

Config Defaults

Optional config.toml:

[defaults]
hue_min = 250.0
hue_max = 310.0
sat_min = 15.0
val_min = 15.0
val_max = 100.0
alpha = 120

Project Layout

app/
  app.py          # main app assembly
  gui/            # UI, theme, picker mixins
  logic/          # image ops, defaults, reset
config.toml       # optional defaults
main.py           # entry point

Development

• Quick check: uv run python -m compileall app main.py
• Contributions welcome; include screenshots for UI tweaks.