Enum OcrNeed 

#[non_exhaustive]
pub enum OcrNeed {
    None,
    Full,
    Partial,
}

How much OCR a page needs.

#[non_exhaustive] because finer verdicts may land in a published crate: a caller that matches on this keeps a fallback arm, and adding one must not be a breaking change.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

None

The page reads as it is: it has a text layer and no large image region without text over it. This is also the answer for a blank page and for a page that cannot be surveyed at all – detection never invents work it cannot see.

Full

The page is a scan: no text layer – nothing drawn, or only invisible or garbage glyphs – while images cover at least half of it. The whole page wants recognizing.

Partial

The page mixes text with at least one large image region (at least 15% of the page) that has next to no text over it (under 5% of the region). Only those regions want recognizing; the rest already reads.

Trait Implementations

impl Clone for OcrNeed

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for OcrNeed

impl Debug for OcrNeed

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

Formats the value using the given formatter.

impl Eq for OcrNeed

impl Hash for OcrNeed

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OcrNeed

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for OcrNeed