Contours extraction

Functions
VISP_EXPORT void	vp::drawContours (vpImage< unsigned char > &I, const std::vector< std::vector< vpImagePoint > > &contours, unsigned char grayValue=255)
VISP_EXPORT void	vp::drawContours (vpImage< vpRGBa > &I, const std::vector< std::vector< vpImagePoint > > &contours, const vpColor &color)
VISP_EXPORT void	vp::findContours (const vpImage< unsigned char > &I_original, vpContour &contours, std::vector< std::vector< vpImagePoint > > &contourPts, const vpContourRetrievalType &retrievalMode=vp::CONTOUR_RETR_TREE)

Detailed Description

Contours extraction.

Function Documentation

drawContours() [1/2]

void vp::drawContours	(	vpImage< unsigned char > &	I,
		const std::vector< std::vector< vpImagePoint > > &	contours,
		unsigned char	grayValue = 255
	)

Draw the input contours on the binary image.

Parameters

I	: Grayscale image where we want to draw the input contours.
contours	: Detected contours.
grayValue	: Drawing grayscale color.

Examples

testContours.cpp, tutorial-contour.cpp, and tutorial-count-coins.cpp.

Definition at line 250 of file vpContours.cpp.

References vpImage< Type >::getSize().

drawContours() [2/2]

void vp::drawContours	(	vpImage< vpRGBa > &	I,
		const std::vector< std::vector< vpImagePoint > > &	contours,
		const vpColor &	color
	)

Draw the input contours on the color image.

Parameters

I	: Color image where we want to draw the input contours.
contours	: Detected contours.
color	: Drawing color.

Definition at line 275 of file vpContours.cpp.

References vpRGBa::B, vpRGBa::G, vpImage< Type >::getSize(), and vpRGBa::R.

findContours()

void vp::findContours	(	const vpImage< unsigned char > &	I_original,
		vpContour &	contours,
		std::vector< std::vector< vpImagePoint > > &	contourPts,
		const vpContourRetrievalType &	retrievalMode = vp::CONTOUR_RETR_TREE
	)

Extract contours from a binary image.

Parameters

I_original	: Input binary image (0 means background, 1 means foreground, other values are not allowed).
contours	: Detected contours.
contourPts	: List of contours, each contour contains a list of contour points.
retrievalMode	: Contour retrieval mode.

Examples

testContours.cpp, tutorial-contour.cpp, and tutorial-count-coins.cpp.

Definition at line 300 of file vpContours.cpp.

References vpImage< Type >::bitmap, vp::CONTOUR_HOLE, vp::CONTOUR_OUTER, vp::CONTOUR_RETR_EXTERNAL, vp::CONTOUR_RETR_LIST, vp::CONTOUR_RETR_TREE, vpImagePoint::get_i(), vpImagePoint::get_j(), vpImage< Type >::getHeight(), vpImage< Type >::getSize(), vpImage< Type >::getWidth(), vp::vpContour::m_children, vp::vpContour::m_contourType, vp::vpContour::m_parent, vp::vpContour::m_points, vpImagePoint::set_j(), and vp::vpContour::setParent().