# Image to Image

**Base URL:** `https://openapi.tripo3d.ai/v3`

**Endpoint:** `POST /generation/image-to-image`

Generate or edit an image from reference images. Supports editing, style transfer, and multi-image fusion.

## Request Parameters

### model

- **Type:** string
- **Required:** Optional
- **Default:** `seedream_v5`

Image editing model.
- `seedream_v5` — strongest editing, style transfer, and multi-image fusion.
- `banana` — fast editing.
- `banana_pro` — higher quality editing.
- `banana2` — latest fast editing.
- `chat_image_1` — base image editing.
- `chat_image_1.5` — higher quality editing.
- `chat_image_2` — latest, best editing.

### input

- **Type:** string
- **Required:** Required

Primary reference image. Accepts a public URL, `file_token`, or `task_id`.**Choose exactly one** — do not pass multiple types simultaneously.



- Formats: `jpeg`, `png` (recommended); `webp` is rejected on some provider routes
- Max file size: **20 MB**
- Max total pixels: **6000 × 6000 = 36 MP**
- Min width/height: 14 px
- Aspect ratio (W/H): **[1/3, 3]**
- URL images must be publicly accessible. Private files require `/v3/files` first.

### inputs

- **Type:** string[]
- **Required:** Optional

Multiple reference images. Each follows the same format as `input`.


- Max: **4** (seedream), **10** (banana), **16** (chat_image)
- Reference: `image[1]`, `image[2]`, etc.

### prompt

- **Type:** string
- **Required:** Conditional

Editing instruction. **Required when no template is specified.**
### size

- **Type:** string
- **Required:** Optional
- **Default:** `2048x2048`

Output image size. Accepts semantic keywords (e.g. 2K / 4K) or explicit WxH pixels (e.g. 2048x2048). Supported values vary by model — see tabs below.
### aspect_ratio

- **Type:** string
- **Required:** Optional
- **Default:** `1:1`

Output aspect ratio. Default `1:1` when omitted (banana series only; filled by the gateway when both `size` and `aspect_ratio` are absent).
- `banana` / `banana_pro`: `1:1`, `2:3`, `3:2`, `3:4`, `4:3`, `4:5`, `5:4`, `9:16`, `16:9`, `21:9`.
- `banana2` additionally supports `1:8`, `1:4`, `4:1`, `8:1`.
Only the **banana** series supports this field. seedream / chat_image generate by `size` — use the `size` parameter instead.

### template

- **Type:** string
- **Required:** Optional

Editing template. When set, `prompt` becomes optional.
- `t_pose` — convert to T-pose.
- `character_completion` — complete a partial character.
- `3d_enhance` — enhance for 3D generation.
- `variants` — generate design variations.
- `figure` — generate a full-body figure.

### output_format

- **Type:** string
- **Required:** Optional
- **Default:** `png`

Output image format.
- `png` — lossless, supports transparency.
- `jpeg` — smaller file size, no transparency.


## Request Example

### Single image

```bash
curl --request POST \
  --url https://openapi.tripo3d.ai/v3/generation/image-to-image \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "input": "https://example.com/reference.png",
  "prompt": "Change the silver outfit into transparent glass.",
  "model": "seedream_v5",
  "size": "2K"
}'
```

### Multi-image

```bash
curl --request POST \
  --url https://openapi.tripo3d.ai/v3/generation/image-to-image \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "inputs": [
    "https://example.com/photo1.png",
    "https://example.com/photo2.png"
  ],
  "prompt": "Use character from image[1] and outfit from image[2].",
  "model": "seedream_v5"
}'
```


## Response Example

### Create task

```json
{
  "code": 0,
  "data": {
    "task_id": "task_abc123"
  }
}
```

### Task result

```json
{
  "code": 0,
  "data": {
    "task_id": "task_abc123",
    "type": "generate_image",
    "status": "success",
    "progress": 100,
    "output": {
      "generated_image": "https://cdn.tripo3d.ai/output/image.png",
      "size": "2048x2048"
    },
    "credits_consumed": 20,
    "created_at": "2026-04-28T12:00:00Z",
    "completed_at": "2026-04-28T12:00:08Z"
  }
}
```