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adding markers to OpenCV

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This commit is contained in:
StevenPuttemans 2015-09-23 10:02:59 +02:00
parent d945aff132
commit 587dca9b1c
2 changed files with 102 additions and 0 deletions
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37
modules/imgproc/include/opencv2/imgproc.hpp
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@ -3902,6 +3902,43 @@ a filled ellipse sector is to be drawn.
CV_EXPORTS_W void ellipse(InputOutputArray img, const RotatedRect& box, const Scalar& color,
int thickness = 1, int lineType = LINE_8);
/* ----------------------------------------------------------------------------------------- */
/* ADDING A SET OF PREDEFINED MARKERS WHICH COULD BE USED TO HIGHLIGHT POSITIONS IN AN IMAGE */
/* ----------------------------------------------------------------------------------------- */
//! Possible set of marker types used for the cv::drawMarker function
enum MarkerTypes
{
MARKER_CROSS = 0, //!< A crosshair marker shape
MARKER_TILTED_CROSS = 1, //!< A 45 degree tilted crosshair marker shape
MARKER_STAR = 2, //!< A star marker shape, combination of cross and tilted cross
MARKER_DIAMOND = 3, //!< A diamond marker shape
MARKER_SQUARE = 4, //!< A square marker shape
MARKER_TRIANGLE_UP = 5, //!< An upwards pointing triangle marker shape
MARKER_TRIANGLE_DOWN = 6 //!< A downwards pointing triangle marker shape
};
/** @brief Draws a marker on a predefined position in an image.
The function drawMarker draws a marker on a given position in the image. For the moment several
marker types are supported, see cv::MarkerTypes for more information.
@param img Image.
@param position The point where the crosshair is positioned.
@param markerType The specific type of marker you want to use, see cv::MarkerTypes
@param color Line color.
@param thickness Line thickness.
@param line_type Type of the line, see cv::LineTypes
@param markerSize The length of the marker axis [default = 20 pixels]
*/
CV_EXPORTS_W void drawMarker(CV_IN_OUT Mat& img, Point position, const Scalar& color,
int markerType = MARKER_CROSS, int markerSize=20, int thickness=1,
int line_type=8);
/* ----------------------------------------------------------------------------------------- */
/* END OF MARKER SECTION */
/* ----------------------------------------------------------------------------------------- */
/** @overload */
CV_EXPORTS void fillConvexPoly(Mat& img, const Point* pts, int npts,
const Scalar& color, int lineType = LINE_8,

65
modules/imgproc/src/drawing.cpp
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@ -1654,6 +1654,71 @@ PolyLine( Mat& img, const Point* v, int count, bool is_closed,
}
}
/* ----------------------------------------------------------------------------------------- */
/* ADDING A SET OF PREDEFINED MARKERS WHICH COULD BE USED TO HIGHLIGHT POSITIONS IN AN IMAGE */
/* ----------------------------------------------------------------------------------------- */
void drawMarker(Mat& img, Point position, const Scalar& color, int markerType, int markerSize, int thickness, int line_type)
{
switch(markerType)
{
// The cross marker case
case MARKER_CROSS:
line(img, Point(position.x-(markerSize/2), position.y), Point(position.x+(markerSize/2), position.y), color, thickness, line_type);
line(img, Point(position.x, position.y-(markerSize/2)), Point(position.x, position.y+(markerSize/2)), color, thickness, line_type);
break;
// The tilted cross marker case
case MARKER_TILTED_CROSS:
line(img, Point(position.x-(markerSize/2), position.y-(markerSize/2)), Point(position.x+(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y-(markerSize/2)), Point(position.x-(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
break;
// The star marker case
case MARKER_STAR:
line(img, Point(position.x-(markerSize/2), position.y), Point(position.x+(markerSize/2), position.y), color, thickness, line_type);
line(img, Point(position.x, position.y-(markerSize/2)), Point(position.x, position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x-(markerSize/2), position.y-(markerSize/2)), Point(position.x+(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y-(markerSize/2)), Point(position.x-(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
break;
// The diamond marker case
case MARKER_DIAMOND:
line(img, Point(position.x, position.y-(markerSize/2)), Point(position.x+(markerSize/2), position.y), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y), Point(position.x, position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x, position.y+(markerSize/2)), Point(position.x-(markerSize/2), position.y), color, thickness, line_type);
line(img, Point(position.x-(markerSize/2), position.y), Point(position.x, position.y-(markerSize/2)), color, thickness, line_type);
break;
// The square marker case
case MARKER_SQUARE:
line(img, Point(position.x-(markerSize/2), position.y-(markerSize/2)), Point(position.x+(markerSize/2), position.y-(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y-(markerSize/2)), Point(position.x+(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y+(markerSize/2)), Point(position.x-(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x-(markerSize/2), position.y+(markerSize/2)), Point(position.x-(markerSize/2), position.y-(markerSize/2)), color, thickness, line_type);
break;
// The triangle up marker case
case MARKER_TRIANGLE_UP:
line(img, Point(position.x-(markerSize/2), position.y+(markerSize/2)), Point(position.x+(markerSize/2), position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y+(markerSize/2)), Point(position.x, position.y-(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x, position.y-(markerSize/2)), Point(position.x-(markerSize/2), position.y-(markerSize/2)), color, thickness, line_type);
break;
// The triangle down marker case
case MARKER_TRIANGLE_DOWN:
line(img, Point(position.x-(markerSize/2), position.y-(markerSize/2)), Point(position.x+(markerSize/2), position.y-(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x+(markerSize/2), position.y-(markerSize/2)), Point(position.x, position.y+(markerSize/2)), color, thickness, line_type);
line(img, Point(position.x, position.y+(markerSize/2)), Point(position.x-(markerSize/2), position.y-(markerSize/2)), color, thickness, line_type);
break;
// If any number that doesn't exist is entered as marker type, draw a cross marker, to avoid crashes
default:
drawMarker(img, position, color, MARKER_CROSS, markerSize, thickness, line_type);
break;
}
}
/****************************************************************************************\
* External functions *
\****************************************************************************************/