Enum OcrError 

pub enum OcrError {
    Pdf(Error),
    Io(Error),
    PageOutOfRange(u32, u32),
    Engine(String),
    Render(String),
    Other(String),
}

Errors returned by the pdf-ocr crate during optical character recognition.

Wrapping engines (Tesseract, PaddleOCR) bubble their own errors up via the OcrError::Engine variant — this crate does not classify engine-specific failures.

Variants

Pdf(Error)

The underlying PDF byte stream could not be parsed before OCR could be attempted (malformed cross-reference table, truncated stream, encrypted document opened without a password, etc.).

Io(Error)

An I/O error occurred while reading the source PDF or writing OCR output (e.g. searchable PDF or hOCR sidecar).

PageOutOfRange(u32, u32)

The caller asked to OCR a page index that does not exist in the document.

Fields: (requested_page, total_pages). Page numbers are 1-based.

Engine(String)

The configured OCR engine returned a non-recoverable error (Tesseract initialisation failure, missing language data, model load failure, etc.). The wrapped string is the engine’s verbatim message — surface it to the user.

Render(String)

Rasterising the page for OCR failed before the engine could see any pixels (font resolution failure, unsupported colorspace, page geometry error, etc.).

Other(String)

A non-categorised OCR failure. Reserved for cases the more specific variants do not cover; the message describes the situation.

Trait Implementations

impl Debug for OcrError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for OcrError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for OcrError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for OcrError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for OcrError

fn from(source: Error) -> Self

Converts to this type from the input type.