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All 181 docs markdown files translated into 20 languages (apps/docs/<locale>/**). Companion to the i18n code PR; admin-merged because the file count exceeds GitHub's per-PR CI trigger limit. Validated by pnpm i18n:check (all surfaces, 0 stale/missing) and a clean all-locale docs build.
85 lines
3.0 KiB
Markdown
85 lines
3.0 KiB
Markdown
---
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description: "以 AI 外延繪製擴展影像畫布，可朝任意方向延伸並填補新區域以與原圖相符。"
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i18n_source_hash: 1b00db4ed40d
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i18n_provenance: human
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i18n_output_hash: 3726ad265b7a
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---
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# AI Canvas Expand {#ai-canvas-expand}
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以 AI 驅動的填補（外延繪製）擴展影像畫布。可朝任意方向延伸影像，並以與現有影像相符的 AI 生成內容填補新區域。
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## API Endpoint {#api-endpoint}
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`POST /api/v1/tools/image/ai-canvas-expand`
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**處理方式：** 非同步（回傳 202，透過 SSE 輪詢 `/api/v1/jobs/{jobId}/progress` 取得狀態）
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**模型套件：** `object-eraser-colorize`（1-2 GB）
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## Parameters {#parameters}
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| file | file | Yes | - | 影像檔案（multipart） |
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| extendTop | integer | No | `0` | 頂部延伸的像素數 |
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| extendRight | integer | No | `0` | 右側延伸的像素數 |
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| extendBottom | integer | No | `0` | 底部延伸的像素數 |
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| extendLeft | integer | No | `0` | 左側延伸的像素數 |
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| tier | string | No | `"balanced"` | 品質等級：`fast`、`balanced`、`high` |
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| format | string | No | `"auto"` | 輸出格式：`auto`、`png`、`jpg`、`jpeg`、`webp`、`tiff`、`gif`、`avif`、`heic`、`heif`、`jxl` |
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| quality | integer | No | `95` | 輸出品質（1-100） |
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至少要有一個延伸方向大於 0。
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## Example Request {#example-request}
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```bash
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curl -X POST http://localhost:1349/api/v1/tools/image/ai-canvas-expand \
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-F "file=@photo.jpg" \
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-F 'settings={"extendTop":200,"extendBottom":200,"extendLeft":100,"extendRight":100,"tier":"balanced"}'
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```
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## Response {#response}
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### Initial Response (202 Accepted) {#initial-response-202-accepted}
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```json
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{
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"async": true
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}
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```
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### Progress (SSE at `/api/v1/jobs/{jobId}/progress`) {#progress-sse-at-api-v1-jobs-jobid-progress}
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```
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event: progress
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data: {"phase":"processing","stage":"Expanding canvas...","percent":50}
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```
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### Final Result (via SSE) {#final-result-via-sse}
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```json
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{
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"phase": "complete",
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"percent": 100,
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"result": {
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"downloadUrl": "/api/v1/download/{jobId}/photo_extended.png",
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"previewUrl": "/api/v1/download/{jobId}/preview.webp",
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"originalSize": 300000,
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"processedSize": 520000
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}
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}
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```
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## Notes {#notes}
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- 需要安裝 `object-eraser-colorize` 模型套件（1-2 GB）。
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- 使用基於 LaMa 的外延繪製，為擴展區域生成內容。
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- `tier` 參數在速度與品質之間取捨：`fast` 能快速產生結果但可能有瑕疵，`high` 耗時較久但能產生更平滑、更連貫的填補。
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- 延伸值以像素為單位。最終影像尺寸為：原始寬度 + extendLeft + extendRight，乘以 原始高度 + extendTop + extendBottom。
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- 對於無法在瀏覽器預覽的輸出格式（HEIC、JXL、TIFF），會在主要輸出旁一併產生 WebP 預覽。
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- 透過自動解碼支援 HEIC/HEIF、RAW、TGA、PSD、EXR 及 HDR 輸入格式。
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