imaqConvexHull

Usage

int imaqConvexHull(Image* dest, Image* source, int connectivity8);

Purpose

Computes the convex envelope for each labeled particle in the source image. If the source image contains more than one particle, you must label each particle with imaqLabel2() before calling this function.

Image Types Supported

IMAQ_IMAGE_U8, IMAQ_IMAGE_I16, IMAQ_IMAGE_SGL

Parameters

Name	Type	Description
dest	Image*	The destination image.
source	Image*	The image containing the labeled particles that the function calculates convex envelopes for.
connectivity8	int	Set this parameter to TRUE to use connectivity-8 to determine whether particles are touching. Set this parameter to FALSE to use connectivity-4 to determine whether particles are touching. For more information about connectivity, see Chapter 9, Binary Morphology, in the NI Vision Concepts Manual

Return Value

Type	Description
int	On success, this function returns a non-zero value. On failure, this function returns 0. To get extended error information, call imaqGetLastError().

Parameter Discussion

source—This function modifies the source image. If you need the original image, create a copy of the image using imaqDuplicate() before using this function.