boofcv.abst.feature.detect.line

Class DetectLineHoughPolar<I extends boofcv.struct.image.ImageGray,D extends boofcv.struct.image.ImageGray>

java.lang.Object

boofcv.abst.feature.detect.line.DetectLineHoughPolar<I,D>

All Implemented Interfaces:

DetectLine<I>

public class DetectLineHoughPolar<I extends boofcv.struct.image.ImageGray,D extends boofcv.struct.image.ImageGray>
extends java.lang.Object
implements DetectLine<I>

Full processing chain for detecting lines using a Hough transform with polar parametrization.

USAGE NOTES: Blurring the image prior to processing can often improve performance. Results will not be perfect and to detect all the obvious lines in the image several false positives might be returned.

See Also:

HoughTransformLinePolar

Constructor Summary

Constructors

Constructor and Description
DetectLineHoughPolar(int localMaxRadius, int minCounts, double resolutionRange, double resolutionAngle, float thresholdEdge, int maxLines, boofcv.abst.filter.derivative.ImageGradient<I,D> gradient) Configures hough line detector.

Method Summary

Modifier and Type	Method and Description
java.util.List<georegression.struct.line.LineParametric2D_F32>	detect(I input) Detect lines inside the image.
boofcv.struct.image.GrayU8	getBinary()
D	getDerivX()
D	getDerivY()
boofcv.struct.image.GrayF32	getEdgeIntensity()
HoughTransformLinePolar	getTransform()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DetectLineHoughPolar

public DetectLineHoughPolar(int localMaxRadius,
                            int minCounts,
                            double resolutionRange,
                            double resolutionAngle,
                            float thresholdEdge,
                            int maxLines,
                            boofcv.abst.filter.derivative.ImageGradient<I,D> gradient)

Configures hough line detector.

Parameters:

localMaxRadius - Radius for local maximum suppression. Try 2.

minCounts - Minimum number of counts for detected line. Critical tuning parameter and image dependent.

resolutionRange - Resolution of line range in pixels. Try 2

resolutionAngle - Resolution of line angle in radius. Try PI/180

thresholdEdge - Edge detection threshold. Try 50.

maxLines - Maximum number of lines to return. If ≤ 0 it will return them all.

gradient - Algorithm for computing image gradient.

Method Detail

detect

public java.util.List<georegression.struct.line.LineParametric2D_F32> detect(I input)

Description copied from interface: DetectLine

Detect lines inside the image.

Specified by:

detect in interface DetectLine<I extends boofcv.struct.image.ImageGray>

Parameters:

input - Input image.

Returns:

List of found lines.

getTransform

public HoughTransformLinePolar getTransform()

getDerivX

public D getDerivX()

getDerivY

public D getDerivY()

getEdgeIntensity

public boofcv.struct.image.GrayF32 getEdgeIntensity()

getBinary

public boofcv.struct.image.GrayU8 getBinary()