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DetectChessboardGrid_Deprecated


Header: AVL.h
Namespace: avl
Module: Calibration

Detects a chessboard on the image, and returns the points where 4 chessboard squares meet.

Applications: Preparation of data required for creating image undistortion map.

Syntax

void avl::DetectChessboardGrid_Deprecated
(
	const avl::Image& inImage,
	int inChessboardWidth,
	int inChessboardHeight,
	const avl::Point3D& inGridOrigin,
	float inSquareDimension,
	bool inAdaptiveThresholding,
	bool inImageNormalization,
	bool inAdditionalFiltering,
	bool inPresenceCheck,
	bool inSubpixelRefinement,
	atl::Conditional<atl::Array<avl::Point2D> >& outImageGridPoints,
	atl::Conditional<atl::Array<avl::Point3D> >& outWorldGridPoints
)

Parameters

Name Type Range Default Description
Input value
 inImage const Image& Input image
Input value
 inChessboardWidth int 4 - Number of ranks (columns) of the chessboard
Input value
 inChessboardHeight int 4 - Number of files (rows) of the chessboard
Input value
 inGridOrigin const Point3D& Real-world coordinates of top-left grid point
Input value
 inSquareDimension float 0.0 - 1.0f Real-world length of a single chessboard square (mm)
Input value
 inAdaptiveThresholding bool Use adaptive thresholding instead of a global threshold of average
Input value
 inImageNormalization bool Normalize input image using histogram equalization prior to detection
Input value
 inAdditionalFiltering bool Use more criteria for eliminating false chessboards
Input value
 inPresenceCheck bool Perform a fast approximate test of chessboard presence before locating it
Input value
 inSubpixelRefinement bool If corners are found, post-process them to improve precision
Output value
 outImageGridPoints Conditional<Array<Point2D> >&
Output value
 outWorldGridPoints Conditional<Array<Point3D> >& Corresponding 3D (World) points, generated from grid origin and square dimension

Errors

List of possible exceptions:

Error type Description
DomainError Empty inImage in DetectChessboardGrid.
DomainError Error in DetectChessboardGrid: Error message
DomainError Error in DetectChessboardGrid:Error message