GMVTextBlockFeature Class

The Mobile Vision API is deprecated and no longer maintained. It is now a part of ML Kit which includes all new on-device ML capabilities. If you use Mobile Vision in your app today, follow the migration guide.

Public Attributes | Properties

GMVTextBlockFeature Class Reference

Overview

Describes a text block detected in a still image frame.

Its properties provide details about detected text.

Inherits GMVFeature.

Public Attributes
NSString *const	GMVFeatureTypeFace
NSString *const	GMVFeatureTypeBarcode
NSString *const	GMVFeatureTypeTextBlock
NSString *const	GMVFeatureTypeTextLine
NSString *const	GMVFeatureTypeTextElement

Property Summary
NSString *	value
	Text contained in the text block, in string form. More...
NSString *	language
	The prevailing language in the text block. More...
NSArray< NSValue * > *	cornerPoints
	The four corner points of the text block, in clockwise order starting with the top left relative to the detected image in the view coordinate system. More...
NSArray< GMVTextLineFeature * > *	lines
	The contents of the text block, broken down into individual lines. More...
CGRect	bounds
	The rectangle that holds the discovered feature relative to the detected image in the view coordinate system. More...
NSString *	type
	The type of feature that was discovered. More...
BOOL	hasTrackingID
	Indicates whether the object has a tracking ID. More...
NSUInteger	trackingID
	The tracking identifier of the feature. More...

Member Data Documentation

- (NSString* const) GMVFeatureTypeFace

inherited

The discovered feature is a person’s face. Use the GMVFaceFeature class to get more information about the detected feature.

- (NSString* const) GMVFeatureTypeBarcode

inherited

The discovered feature is a barcode. Use the GMVBarcodeFeature class to get more information about the detected feature.

- (NSString* const) GMVFeatureTypeTextBlock

inherited

The discovered feature is a text block. Use the GMVTextBlockFeature class to get more information about the detected feature.

- (NSString* const) GMVFeatureTypeTextLine

inherited

The discovered feature is a text line. Use the GMVTextLineFeature class to get more information about the detected feature.

- (NSString* const) GMVFeatureTypeTextElement

inherited

The discovered feature is a text element. Use the GMVTextElementFeature class to get more information about the detected feature.

Property Detail

- (NSString*) value

readatomiccopy

Text contained in the text block, in string form.

- (NSString*) language

readatomiccopy

The prevailing language in the text block.

The format is the ISO 639-1 two-letter language code if that is defined (e.g. "en"), or else the ISO 639-2 three-letter code if that is defined.

- (NSArray<NSValue *>*) cornerPoints

readatomiccopy

The four corner points of the text block, in clockwise order starting with the top left relative to the detected image in the view coordinate system.

These are CGPoints boxed in NSValues.

- (NSArray<GMVTextLineFeature *>*) lines

readatomiccopy

The contents of the text block, broken down into individual lines.

- (CGRect) bounds

readatomicassigninherited

The rectangle that holds the discovered feature relative to the detected image in the view coordinate system.

- (NSString*) type

readatomiccopyinherited

The type of feature that was discovered.

- (BOOL) hasTrackingID

readatomicassigninherited

Indicates whether the object has a tracking ID.

- (NSUInteger) trackingID

readatomicassigninherited

The tracking identifier of the feature.

This ID is not associated with a specific feature but identifies the same text block among consecutive video frames.