# tinker.types.ImageChunk

## *class* [**tinker.types.ImageChunk**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L12)(*[StrictBase](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/_models.py#L76)*)

**Fields:**

- [**data**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L13) (*bytes*) – Image data as bytes
- [**format**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L16) (*Literal['png', 'jpeg']*) – Image format
- [**expected_tokens**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L19) (*int | None*) – Expected number of tokens this image represents. This is only advisory: the tinker backend will compute the number of tokens from the image, and we can fail requests quickly if the tokens does not match expected_tokens.
- [**type**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L25) (*Literal['image']*)

### [**validate_data**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L29)(*value*)

Deserialize base64 string to bytes if needed.

**Parameters:**

- [**value**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L29) (*Union[bytes, str]*)

**Returns:** *bytes*

### [**serialize_data**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L36)(*value*)

Serialize bytes to base64 string for JSON.

**Parameters:**

- [**value**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/image_chunk.py#L36) (*bytes*)

**Returns:** *str*