Instance Property

minimumTextHeight

The minimum height of the text expected to be recognized, relative to the image height.

Declaration

@property(readwrite, nonatomic, assign) float minimumTextHeight;

Discussion

Specify a floating-point number relative to the image height. For example, to limit recognition to text that is half of the image height, use 0.5. Increasing the size reduces memory consumption and expedites recognition with the tradeoff of ignoring text smaller than the minimum height. The default value is 1/32, or 0.03125.

See Also

Customizing Recognition Constraints

customWords

An array of strings to supplement the recognized languages at the word recognition stage.

recognitionLevel

A value that determines whether the request prioritizes accuracy or speed in text recognition.

VNRequestTextRecognitionLevel

An enumeration of the tradeoff between fast and accurate text recognition.