Back to FabImage Library website

You are here: Start » Function Reference » Computer Vision » Optical Character Recognition » MakeCharacterSamples

MakeCharacterSamples


Header: FIL.h
Namespace: fil
Module: OCR

Creates training font samples from the provided regions.

Syntax

C++
C#
 
void fil::MakeCharacterSamples
(
	const ftl::Array<fil::Region>& inCharacterRegions,
	const ftl::String& inCharacters,
	ftl::Array<fil::CharacterSample>& outCharacterSamples
)

Parameters

Name Type Default Description
Input value inCharacterRegions const Array<Region>& Array of character regions
Input value inCharacters const String& Character that should be assigned to corresponding regions
Output value outCharacterSamples Array<CharacterSample>& Array of CharacterSamples

Description

The operation creates a set of character samples used to train OcrMlpModel in the TrainOcr_MLP filter. Consecutive letters in inCharacters correspond to consecutive regions in inCharacterRegions.

Remarks

The length of inCharacters must be equal to the size of the inCharacterRegions array.

To read more about how to use traditional OCR technique, refer to Machine Vision Guide: Optical Character Recognition - traditional method

Errors

List of possible exceptions:

Error type Description
DomainError At least a single character should be provided in MakeCharacterSamples.
DomainError Parameter inCharacterRegions contains empty region in MakeCharacterSamples.
DomainError The size of inCharacterRegions and the length of inCharacters are not equal in MakeCharacterSamples.

See Also

  • TrainOcr_MLP – Trains an OCR multilayer perceptron classifier.