TIEVisionDrawing.fillConvexPoly

Declaration

procedure fillConvexPoly(image: TIEVisionImage; points: TIEVisionVectorPoint; const color: TIEVisionScalar; linetype: int32_t = 8; shift: int32_t = 0); safecall;

Description

Fill a convex polygon, e.g. a triangle or a convex hull. This is faster than fillPoly.
It also works for any polygon whose edges cross each horizontal line no more than twice.

Parameter	Description
image	Destination image (8 bit or more, 1 to 4 channels)
points	Polygon vertices
color	Fill color in B:G:R orientation, e.g. for blue: IEVisionScalar(255, 0, 0). For a gray scale mask, e.g. IEVisionScalar(255, 0, 0)
linetype	4 or 8 (connectivity of the edge pixels), or 16 for an antialiased edge
shift	Number of fractional bits in the point coordinates (0..16), for sub-pixel positions

Demo

Demos\ImageEditing\EveryMethod\EveryMethod.dpr

Example

// Create a mask from the convex hull of some points
mask := IEVisionLib().createImage( ImageEnView1.IEBitmap.Width, ImageEnView1.IEBitmap.Height, ievUINT8, 1 );
mask.setZero();
IEVisionLib().createDrawing().fillConvexPoly( mask, IEVisionLib().createMath().convexHull( points ), IEVisionScalar( 255, 0, 0 ));

TIEVisionDrawing.fillConvexPoly