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Green Goblins

Upscale any photo with any zoom captured on the Samsung Galaxy S25 to a DSLR level quality

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Core trick

Runs Real-ESRGAN x4plus as an ExecuTorch model on the Hexagon DSP through the QNN backend to upscale photos 4x on-device.

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vision

Description

Upscale any photo with any zoom captured on the Samsung Galaxy S25 to a DSLR level quality
NishantJoshi00/image-compress★ 00 forksKotlinNOASSERTIONCreated Oct 20, 2025 · last push Oct 20, 2025

README excerpt

# Image Improver - AI-Powered Image Upscaler for Android

An Android app that uses Real-ESRGAN x4plus model running on Qualcomm's Hexagon DSP via ExecuTorch to upscale images by 4x.

## Features

- Simple share-to interface - no complex UI
- Real-ESRGAN x4plus for high-quality upscaling
- Runs on-device using Qualcomm's QNN backend (Hexagon DSP)
- Automatic gallery save with proper Android 15 support
- Memory-efficient processing with automatic downsampling for large images

## Requirements

### For Development
- Android Studio Ladybug or newer
- Android SDK API 35 (Android 15)
- Android NDK 26c
- Gradle 8.7+
- Device with Qualcomm SoC (Snapdragon 8 Gen 1+, or similar with Hexagon DSP)

### For Model Conversion
- Python 3.8+
- PyTorch 2.0+
- ExecuTorch 0.6+
- Qualcomm AI Engine Direct SDK (QNN) 2.37+
- Linux (Ubuntu 22.04 LTS recommended) or WSL2

## Project Structure

```
image-improver/
├── app/
│   ├── src/main/
│   │   ├── java/com/imageimprover/
│   │   │   ├── MainActivity.kt              # Main entry point
│   │   │   ├── ModelInference.kt            # ExecuTorch model loader
│   │   │   ├── ImageProcessor.kt            # Pre/post processing
│   │   │   ├── ImageSaver.kt                # Gallery save logic
│   │   │   └── PermissionManager.kt         # Runtime permissions
│   │   ├── res/                             # Resources
│   │   ├── assets/
│   │   │   └── real_esrgan_x4plus_qnn.pte  # Model file (you need to generate this)
│   │   └── AndroidManifest.xml
│   └─

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