You are here: Start » AVL.NET » AVL.ExtractText(AvlNet.Image, AvlNet.Rectangle2D, AvlNet.CoordinateSystem2D, AvlNet.TextSegmentation, AvlNet.Region[], AvlNet.Region, AvlNet.Region[], AvlNet.Rectangle2D)

AVL.ExtractText(AvlNet.Image, AvlNet.Rectangle2D, AvlNet.CoordinateSystem2D, AvlNet.TextSegmentation, AvlNet.Region[], AvlNet.Region, AvlNet.Region[], AvlNet.Rectangle2D)

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,
	out AvlNet.Region diagTextRegion,
	out AvlNet.Region[] diagAlignedCharacters,
	out AvlNet.Rectangle2D diagAlignedRoi
)

Parameters

inImage: Type: AvlNet.Image
An input image with text
inRoi: Type: AvlNet.Rectangle2D
Location of the text
inRoiAlignment: Type: AvlNet.CoordinateSystem2D
Adjusts the region of interest to the position of the inspected object
inSegmentationModel: Type: AvlNet.TextSegmentation
Model used for separating text from background
outCharacters: Type: AvlNet.Region
Split characters aligned to ROI
diagTextRegion: Type: AvlNet.Region
Region of text after extraction
diagAlignedCharacters: Type: AvlNet.Region
Character regions preserving original image orientation
diagAlignedRoi: Type: AvlNet.Rectangle2D
ROI rectangle after alignment

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