imaqConcentricRake
Usage
ConcentricRakeReport* imaqConcentricRake(const Image* image, const ROI* roi, ConcentricRakeDirection direction, EdgeProcess process, const RakeOptions* options);
Purpose
Finds edges along concentric circular or annular paths in the image.
 |
Note This function is obsolete. The replacement function is imaqConcentricRake2(). |
Image Types Supported
IMAQ_IMAGE_U8, IMAQ_IMAGE_I16, IMAQ_IMAGE_SGL
Parameters
|
Name
|
Type
|
Description
|
|---|---|---|
| image | const Image* | The image in which to find edges. |
| roi | const ROI* | The annular region the function looks in for the edges. The first contour of roi must be an annulus. |
| direction | ConcentricRakeDirection | The direction the function searches for edges along the search lines. |
| process | EdgeProcess | Defines the edges for which the function looks. |
| options | const RakeOptions* | Describes how to search for the edges. |
Return Value
| Type |
Description |
|---|---|
| ConcentricRakeReport* | On success, this function returns information describing the calculated edges and the concentric rake used by the function. On failure, this function returns NULL. To get extended error information, call imaqGetLastError(). When you are finished with the information, dispose of it by calling imaqDispose(). |
Parameter Discussion
options—Set the options parameter to NULL to use the default options, as follows:
| threshold | 40 |
| width | 4 |
| steepness | 2 |
| subsamplingRatio | 5 |
| subpixelType | IMAQ_QUADRATIC |
| subpixelDivisions | 1 |