FAQ – RE Coloriser: Light Version & PRO Version

This FAQ presents the technical differences between the Light version and the PRO version, as well as the technologies used.

1. Technology Used: DeOldify, fastai, PyTorch and RE Coloriser Optimizations

RE Coloriser is based on the open‑source DeOldify technology, a colorization engine built on:

SAGAN (Self‑Attention Generative Adversarial Network)
NoGAN (stabilized training, more coherent colors)
Modified U‑Net with self‑attention
fastai (deep learning framework)
PyTorch (Meta AI Research)

These technologies enable more realistic colorization, better handling of fine textures, and increased stability on faces and complex scenes.

RE Coloriser PRO uses GPU‑optimized models, offering speed and stability for image and film restoration.

2. What Does the Light Version Offer?

The Light version is designed to be simple, reliable, and accessible. It runs entirely in CPU mode and requires no complex installation: no Python, no CUDA, no external dependencies.

Main Features

Single‑image colorization
Artistic and Stable models
Render Factor adjustment
100% offline operation
Simple and intuitive interface
One‑click installer or portable version

Technical Limitations

CPU‑only processing → slower
No video processing
No batch processing
Limited performance on high‑resolution images

For occasional use or single‑image colorization, the Light version is ideal.

3. Why Upgrade to RE Coloriser PRO?

The PRO version offers a complete pipeline for image and video colorization, with full GPU acceleration.

Major Technical Advantages

GPU acceleration (CUDA) → up to 20× faster
Full video colorization (frame‑by‑frame + reconstruction)
Batch photo processing for entire folders
Models optimized for color stability
Support for higher‑resolution images
Complete video pipeline (extraction, colorization, reconstruction)

Light vs PRO Comparison

Function	Light	PRO
Image Colorization	✔️ Yes	✔️ Yes (Optimized GPU)
Video Colorization	❌ No	✔️ Yes
Batch Processing	❌ No	✔️ Yes
Performance	CPU only	GPU (CUDA)
Built‑in Video Conversion	No	Yes (Optimized H264/MP4)
Target Users	Occasional Use	Advanced Restoration Photo & Video
License	Freeware (Free)	Lifetime License (2 PCs) ✔️ (One‑time purchase, no subscription)

4. Integrated Video Conversion (H264/MP4)

RE Coloriser PRO includes a complete video conversion module, allowing automatic transformation of unsupported formats (MOV, MKV, M4V, AVI, WMV, MPEG‑2) into MP4/H264 optimized for colorization.

Advantages

Built‑in conversion, no external software required
Optimized parameters (CRF 12, preset slow, yuv420p)
Guaranteed compatibility with AI models
Integrated progress bar
Smooth workflow: select → convert → colorize

This feature removes a major obstacle: the diversity of video formats.

5. Complete Video Pipeline

RE Coloriser PRO manages the entire video process:

Format detection
Automatic conversion if needed
Frame extraction
Frame‑by‑frame colorization
Video reconstruction
Audio preservation
Automatic cleanup of temporary files

This pipeline is designed to be reproducible and fully offline.

6. What Is the Render Factor?

The Render Factor controls the internal resolution used by the model. The higher it is, the more detailed the colorization.

10–20: fast
21–35: ideal balance
36–45: high quality

7. Full Privacy

RE Coloriser Light and PRO run locally on your PC.

No images sent online
No data collection
The only online step is license activation (PRO version)

Your images are processed on your computer.

8. Support & Contact

Philippe Mathis (PhM1000)
info@recolorizer.com