---
title: Image Preprocessor
emoji: 🤖
colorFrom: blue
colorTo: purple
sdk: gradio
sdk_version: "4.44.0"
app_file: app.py
pinned: false
python_version: "3.11"
---

# Image Preprocessor — MTCNN Face Detection

Detects a face in an uploaded image, crops it with a small context margin,
and returns a clean **224 × 224 RGB** image ready for downstream emotion
classification.

## API

```
POST /preprocess
Input : image (multipart file)
Output: preprocessed face image (PNG)
```

Used internally by the LyricMind backend (`image_to_emotion` pipeline).