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SnapOtter/apps/docs/tools/image/red-eye-removal.md
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---
description: AI-powered detection and correction of red eye caused by camera flash.
---
# Red Eye Removal {#red-eye-removal}
AI-powered detection and correction of red eye caused by camera flash.
## API Endpoint {#api-endpoint}
`POST /api/v1/tools/image/red-eye-removal`
**Processing:** Asynchronous (returns 202, poll `/api/v1/jobs/{jobId}/progress` for status via SSE)
**Model bundle:** `face-detection` (200-300 MB)
## Parameters {#parameters}
| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| file | file | Yes | - | Image file (multipart) |
| sensitivity | number | No | `50` | Red eye detection sensitivity (0-100). Higher values detect more subtle red-eye |
| strength | number | No | `70` | Correction strength (0-100). How aggressively to neutralize red |
| format | string | No | - | Output format (optional override) |
| quality | number | No | `90` | Output quality (1-100) |
## Example Request {#example-request}
```bash
curl -X POST http://localhost:1349/api/v1/tools/image/red-eye-removal \
-F "file=@flash-photo.jpg" \
-F 'settings={"sensitivity":60,"strength":80}'
```
## Response {#response}
### Initial Response (202 Accepted) {#initial-response-202-accepted}
```json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"async": true
}
```
### Progress (SSE at `/api/v1/jobs/{jobId}/progress`) {#progress-sse-at-api-v1-jobs-jobid-progress}
```
event: progress
data: {"phase":"processing","stage":"Detecting red eyes...","percent":40}
```
### Final Result (via SSE) {#final-result-via-sse}
```json
{
"phase": "complete",
"percent": 100,
"result": {
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/{jobId}/flash-photo_redeye_fixed.png",
"originalSize": 280000,
"processedSize": 290000,
"facesDetected": 2,
"eyesCorrected": 4
}
}
```
## Notes {#notes}
- Requires the `face-detection` model bundle to be installed (200-300 MB).
- First detects faces, then locates eye regions within each face, and finally identifies and corrects red-eye pixels.
- The `facesDetected` count indicates how many faces were found; `eyesCorrected` is the total number of individual eyes that had red-eye corrected.
- Output is always PNG for maximum quality preservation.
- Supports HEIC/HEIF, RAW, TGA, PSD, EXR, and HDR input formats via automatic decoding.