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GoogleVisionBackend

pdf_engine::ocr

Struct GoogleVisionBackend 

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pub struct GoogleVisionBackend { /* private fields */ }
Expand description

Blocking HTTP OCR backend for Google Cloud Vision.

Authentication supports:

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impl GoogleVisionBackend

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pub fn from_api_key(key: &str) -> Self

Create a backend from an API key.

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pub fn from_service_account(json_path: &str) -> Result<Self, OcrError>

Create a backend from a service-account JSON file.

The credentials are loaded eagerly and an OAuth access token is minted on demand using the service-account private key.

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pub fn from_env() -> Result<Self, OcrError>

Create a backend from Google Cloud environment variables.

Resolution order:

  1. GOOGLE_VISION_API_KEY
  2. GOOGLE_APPLICATION_CREDENTIALS
  3. GOOGLE_CLOUD_PROJECT plus the standard gcloud application-default credentials file

Trait Implementations§

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impl OcrBackend for GoogleVisionBackend

Available on crate feature ocr-google only.
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fn recognize( &self, image_data: &[u8], width: u32, height: u32, ) -> Result<OcrResult, OcrError>

Recognize text in a rasterized page image. Read more
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fn name(&self) -> &str

Short identifier shown in test metadata (e.g. "ocrs", "mistral").

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