MedgeAlloc

This function allocates an Edge Finder context on the specified system. An Edge Finder context contains all the information necessary to perform an MedgeCalculate() operation, including global processing settings, and edge features to calculate. When the Edge Finder context is no longer required, you should release its memory, using MedgeFree().

Edge Finder context settings can be adjusted using MedgeControl().

Note that this function reference has not been updated for a MIL system added during a MIL update. Refer to the MIL system's release note to see if there is complementary information.

Parameters

This function is not supported on the selected boards.

Parameters

SystemId INQ

Specifies the system on which to allocate the Edge Finder context.

This parameter should be set to one of the following values:

For specifying the system
Value	Description
M_DEFAULT_HOST	Specifies the default Host system of the current MIL application.
MIL system identifier	Specifies a valid system identifier, previously allocated using MsysAlloc().

EdgeFinderType INQ

Specifies the type of Edge Finder context. This parameter must be set to one of the values below.

For the Edge Finder context
Value	Description
M_CONTOUR	Specifies a contour context type, which is used to find object contours in images.
M_CREST	Specifies a crest context type, which is used to find thin line crests in images.

ControlFlag

Reserved for future expansion and must be set to M_DEFAULT.

ContextIdPtr

Specifies the address of the variable in which to write the Edge Finder context identifier. Since the MedgeAlloc() function also returns the Edge Finder context identifier, you can set this parameter to M_NULL.

Return value

The returned value is the Edge Finder context identifier if the allocation is successful. If allocation fails, M_NULL is returned.

Compilation information

Header	Include mil.h.
Library	Use mil.lib; miledge.lib.
DLL	Requires mil.dll; miledge.dll.