You are here: Start » AVL.NET » AVL.ScanExactlyNRidges(AvlNet.Image, AvlNet.ScanMap, AvlNet.RidgeScanParams, int, AvlNet.Selection, float, float?, AvlNet.LocalBlindness, AvlNet.Ridge1D[], AvlNet.Gap1D[], AvlNet.Profile, AvlNet.Profile)

AVL.ScanExactlyNRidges(AvlNet.Image, AvlNet.ScanMap, AvlNet.RidgeScanParams, int, AvlNet.Selection, float, float?, AvlNet.LocalBlindness, AvlNet.Ridge1D[], AvlNet.Gap1D[], AvlNet.Profile, AvlNet.Profile)

Locates a specified number of the strongest dark or bright pixel peak along a given path.

Namespace:	AvlNet
Assembly:	AVL.NET.dll

Syntax


public static void ScanExactlyNRidges(
	AvlNet.Image inImage,
	AvlNet.ScanMap inScanMap,
	AvlNet.RidgeScanParams inRidgeScanParams,
	int inRidgeCount,
	AvlNet.Selection inRidgeSelection,
	float inMinDistance,
	float? inMaxDistance,
	AvlNet.LocalBlindness inLocalBlindness,
	out AvlNet.Ridge1D[] outRidges,
	out AvlNet.Gap1D[] outGaps,
	out AvlNet.Profile diagBrightnessProfile,
	out AvlNet.Profile diagResponseProfile
)

Parameters

inImage: Type: AvlNet.Image
Input image
inScanMap: Type: AvlNet.ScanMap
Data precomputed with CreateScanMap
inRidgeScanParams: Type: AvlNet.RidgeScanParams
Parameters controlling the ridge extraction process
inRidgeCount: Type: System.Int32
Number of ridges to be found
inRidgeSelection: Type: AvlNet.Selection
Selection mode of the resulting ridges
inMinDistance: Type: System.Single
Minimal distance between consecutive ridges
inMaxDistance: Type: System.Nullable<System.Single>
Maximal distance between consecutive ridges, or null.
inLocalBlindness: Type: AvlNet.LocalBlindness
Defines conditions in which weaker ridges can be detected in the vicinity of stronger ridges, or null.
outRidges: Type: AvlNet.Ridge1D
Found ridges
outGaps: Type: AvlNet.Gap1D
Gaps between consecutive edges
diagBrightnessProfile: Type: AvlNet.Profile
Extracted image profile
diagResponseProfile: Type: AvlNet.Profile
Profile of the ridge operator response

Description

The operation scans the image using inScanMap previously generated from a scan path and finds a set of inRidgeCount image ridges perpendicular to the path. If no subset (of inRidgeCount elements) of detected ridges meets the requirements of inRidgeScanParams.minMagnitude, inMinDistance, inRidgeScanParams.ridgePolarity then the outputs are set to NIL.

Note that in case of a scan path which is closed, the parameters controlling the distances between consecutive found objects do not control the distance between the first and the last of the found objects (counting from the beginning of the scan path).

Examples

ScanMultipleRidges locates the ridges using a scan map representing the scan path above.

Remarks

For more information about local coordinate systems please refer to the following article.