NPY Generator — Synthetic Shape Image Generator

Tauri + React app for generating synthetic .npy image arrays with controllable shapes, value ranges, and boundary profiles.

Features

• Shape types: circle, ellipse, line, bow (arc)
• Range-based parameters (sizes, angles, positions, values)
• Boundary functions: tanh-sigmoid, hard-step, smoothstep, logistic
• Instant preview (PNG) + metadata
• Batch generation with run folder + manifest
• Preset save/load using Tauri Store

Dev

pnpm install
pnpm dev

Build

pnpm build

DMG bundling is disabled by default. See apps/desktop/src-tauri/tauri.conf.json to enable it.

Output Format

Generated data uses .npy (NumPy) with int32 dtype. Optionally, a normalized .png can be saved for debugging.

Run Folder Structure

output_root/
  run_YYYYMMDD_HHMMSS/
    circle/
    ellipse/
    line/
    bow/
    manifest.jsonl

File Naming

{type}__{presetName}__seed{seed}__000001.npy

Manifest (manifest.jsonl)

One JSON record per line containing:

• file (relative path)
• shape type
• preset name
• seed + index
• sampled parameters, positions, spacing, boundary config
• image size

Verify in Python

A helper script is included:

python scripts/verify_npy.py /path/to/file.npy

Example output:

shape=(64, 64) dtype=int32 min=-100000 max=140000