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AVL.ExtractText Method

Ready-to-use tool for extracting and splitting character to single characters.

Namespace:	AvlNet
Assembly:	AVL.NET.dll

Syntax

public static void ExtractText(
	AvlNet.Image inImage,
	AvlNet.Rectangle2D inRoi,
	AvlNet.CoordinateSystem2D inRoiAlignment,
	AvlNet.TextSegmentation inSegmentationModel,
	out AvlNet.Region[] outCharacters
)

Parameters

Name	Type	Description
inImage	AvlNet.Image	An input image with text.
inRoi	AvlNet.Rectangle2D	Location of the text.
inRoiAlignment	AvlNet.CoordinateSystem2D	Adjusts the region of interest to the position of the inspected object.
inSegmentationModel	AvlNet.TextSegmentation	Model used for separating text from background.
outCharacters	AvlNet.Region	Split characters aligned to ROI.

Description

This filter distinguish characters from the background using a set of algorithms. This filter performs two steps: text extraction and text segmentation:

Text extraction – in this step filter uses some basic thresholding methods to get a characters region from the image.
Text segmentation – split previously found region into separate regions contains character.

Input inRoi should contains only a single line of text.

Remarks

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

Errors