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SnapOtter/apps/docs/tools/image/blur-background.md
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SnapOtter 8532f3227b docs: audit all 157 tool pages against live schemas
Reconcile every tool page's parameters, defaults, and response shape against the tool's Zod settings schema and executionHint in code. Notable fixes: color-palette (add count + format params, hex output, median-cut algorithm), favicon (add 5 params, was documented as having none), qr-generate (add logoDataUri), convert (add ppm/eps/tga formats), video-loudnorm (-16 LUFS not -14), smart-crop (async 202 not sync 200), images-to-video (1080x1080 square), and several output-filename and behavior-note corrections.

Also normalize API endpoint paths to /api/v1/tools/<id> (no modality segment) and standardize curl examples on the Docker API port 1349. Verified with a clean docs build.
2026-06-18 14:12:28 +08:00

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Markdown

---
description: Blur the background while keeping the subject sharp using AI.
---
# Blur Background
Blur the background of an image while keeping the subject sharp. The AI model isolates the subject, applies a blur to the original background, and composites the sharp subject on top.
## API Endpoint
`POST /api/v1/tools/blur-background`
Accepts multipart form data with an image file and a JSON `settings` field.
## Parameters
| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| intensity | integer | No | `50` | Blur intensity (1-100) |
| feather | integer | No | `0` | Edge feathering radius (0-20) |
| format | string | No | `"png"` | Output format: `png` or `webp` |
## Example Request
```bash
curl -X POST http://localhost:1349/api/v1/tools/blur-background \
-H "Authorization: Bearer si_your-api-key" \
-F "file=@photo.jpg" \
-F 'settings={"intensity": 75, "feather": 3}'
```
## Example Response
```json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"async": true
}
```
Track progress via SSE at `GET /api/v1/jobs/{jobId}/progress`. When the job completes, the SSE stream emits a `completed` event with the download URL.
## Notes
- This is an AI-powered tool that returns `202 Accepted` and processes asynchronously. Connect to the SSE endpoint to receive progress updates and the final result.
- Requires the **background-removal** feature bundle to be installed. Returns `501` if the bundle is not available.
- Higher intensity values produce a stronger blur effect. Values above 80 create a pronounced bokeh-like separation.
- HEIC, RAW, PSD, and SVG inputs are automatically decoded before processing.