2xVHS2HD

2× restoration for VHS-quality images: less haloing, ghosting and noise.

A RealPLKSR model built to restore VHS recordings by reducing halos, ghosting and noise patterns while upscaling 2×. It also works well on soft, low-quality photos.

Download ONNX View repository Paper

Super-resolution Computer Vision

Scale: 2×
Parameters: 7.4M
CPU time per 256 px tile: 3.8s
ONNX file: 30MB

Example output

Drag the handle to compare. Produced by running this model.

After: Input: a 240 px frame with VHS-style softness, colour bleed and noise. Output: the model's 2× result. — Input: a 240 px frame with VHS-style softness, colour bleed and noise. Output: the model's 2× result.

Before: Input: a 240 px frame with VHS-style softness, colour bleed and noise. Output: the model's 2× result. — Input: a 240 px frame with VHS-style softness, colour bleed and noise. Output: the model's 2× result.

Technical details

Architecture: RealPLKSR (partial large kernel CNN)
Training data: Movies and private films
Training: 385,000 iterations
ONNX build: FP32, opset 17, any image size
Input: RGB, NCHW, values 0–1
Benchmark: ONNX Runtime CPU, Apple M2 Pro
Original release: 27 August 2024

Good for

VHS and video frames
Soft, low-quality photos
Halo and ghosting removal

Run it in Flutter

This model runs as-is with our open-source flutter_super_resolution package (MIT), which tiles large images and uses Core ML on Apple devices when available. It works on iOS, Android (ARM devices), macOS and Windows.

pubspec.yaml · Dartgeneral2xhigh.onnx

dependencies:
  flutter_super_resolution: ^1.1.1

// Load the model, then upscale a ui.Image
final upscaler = FlutterUpscaler(tileSize: 128, overlap: 8);
await upscaler.initializeModel('assets/models/general2xhigh.onnx');

final result = await upscaler.upscaleImage(
  image,
  scale: 2,
  onProgress: (progress, message) => print('$message ${(progress * 100).round()}%'),
);

upscaler.dispose();

Package on GitHub All models that work with it