boofcv.alg.feature.detect.edge

Class GGradientToEdgeFeatures

java.lang.Object

boofcv.alg.feature.detect.edge.GGradientToEdgeFeatures

public class GGradientToEdgeFeatures
extends java.lang.Object

Image type agnostic version of GradientToEdgeFeatures.

Constructor Summary

Constructors

Constructor and Description
GGradientToEdgeFeatures()

Method Summary

Modifier and Type	Method and Description
static <D extends boofcv.struct.image.ImageGray> void	direction(D derivX, D derivY, boofcv.struct.image.GrayF32 angle) Computes the edge orientation using the Math.atan(double) function.
static <D extends boofcv.struct.image.ImageGray> void	direction2(D derivX, D derivY, boofcv.struct.image.GrayF32 angle) Computes the edge orientation using the Math.atan2(double, double) function.
static <D extends boofcv.struct.image.ImageGray> void	intensityAbs(D derivX, D derivY, boofcv.struct.image.GrayF32 intensity) Computes the edge intensity using a Euclidean norm.
static <D extends boofcv.struct.image.ImageGray> void	intensityE(D derivX, D derivY, boofcv.struct.image.GrayF32 intensity) Computes the edge intensity using a Euclidean norm.
static <D extends boofcv.struct.image.ImageGray> void	nonMaxSuppressionCrude4(boofcv.struct.image.GrayF32 intensity, D derivX, D derivY, boofcv.struct.image.GrayF32 output) Sets edge intensities to zero if the pixel has an intensity which is less than any of the two adjacent pixels.

Methods inherited from class java.lang.Object

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

Constructor Detail

GGradientToEdgeFeatures

public GGradientToEdgeFeatures()

Method Detail

intensityE

public static <D extends boofcv.struct.image.ImageGray> void intensityE(D derivX,
                                                                        D derivY,
                                                                        boofcv.struct.image.GrayF32 intensity)

Computes the edge intensity using a Euclidean norm.

Parameters:

derivX - Derivative along x-axis. Not modified.

derivY - Derivative along y-axis. Not modified.

intensity - Edge intensity.

intensityAbs

public static <D extends boofcv.struct.image.ImageGray> void intensityAbs(D derivX,
                                                                          D derivY,
                                                                          boofcv.struct.image.GrayF32 intensity)

Computes the edge intensity using a Euclidean norm.

Parameters:

derivX - Derivative along x-axis. Not modified.

derivY - Derivative along y-axis. Not modified.

intensity - Edge intensity.

direction

public static <D extends boofcv.struct.image.ImageGray> void direction(D derivX,
                                                                       D derivY,
                                                                       boofcv.struct.image.GrayF32 angle)

Computes the edge orientation using the Math.atan(double) function.

Parameters:

derivX - Derivative along x-axis. Not modified.

derivY - Derivative along y-axis. Not modified.

angle - Edge orientation in radians (-pi/2 to pi/2).

direction2

public static <D extends boofcv.struct.image.ImageGray> void direction2(D derivX,
                                                                        D derivY,
                                                                        boofcv.struct.image.GrayF32 angle)

Computes the edge orientation using the Math.atan2(double, double) function.

Parameters:

derivX - Derivative along x-axis. Not modified.

derivY - Derivative along y-axis. Not modified.

angle - Edge orientation in radians (-pi to pi).

nonMaxSuppressionCrude4

public static <D extends boofcv.struct.image.ImageGray> void nonMaxSuppressionCrude4(boofcv.struct.image.GrayF32 intensity,
                                                                                     D derivX,
                                                                                     D derivY,
                                                                                     boofcv.struct.image.GrayF32 output)

Sets edge intensities to zero if the pixel has an intensity which is less than any of the two adjacent pixels. Pixel adjacency is determined based upon the sign of the image gradient. Less precise than other methods, but faster.

Parameters:

intensity - Edge intensities. Not modified.

derivX - Image derivative along x-axis.

derivY - Image derivative along y-axis.

output - Filtered intensity. Modified.