org.openimaj.image.objectdetection.hog

Class HOGDetector

java.lang.Object

org.openimaj.image.objectdetection.AbstractMultiScaleObjectDetector<FImage,Rectangle>

org.openimaj.image.objectdetection.hog.HOGDetector

All Implemented Interfaces:

MultiScaleObjectDetector<FImage,Rectangle>, ObjectDetector<FImage,Rectangle>

public class HOGDetector
extends AbstractMultiScaleObjectDetector<FImage,Rectangle>

Field Summary

Fields

Modifier and Type	Field and Description
protected HOGClassifier	classifier
protected float	scaleFactor

Fields inherited from class org.openimaj.image.objectdetection.AbstractMultiScaleObjectDetector

maxSize, minSize, roi

Constructor Summary

Constructors

Constructor and Description
HOGDetector(HOGClassifier classifier)
HOGDetector(HOGClassifier classifier, float scaleFactor)

Method Summary

Modifier and Type	Method and Description
List<Rectangle>	detect(FImage image) Detect objects in the given image and return representations of them.
protected void	detectAtScale(int startX, int stopX, int startY, int stopY, float ystep, int windowWidth, int windowHeight, List<Rectangle> results) Perform detection at a single scale.

Methods inherited from class org.openimaj.image.objectdetection.AbstractMultiScaleObjectDetector

getMaximumDetectionSize, getMinimumDetectionSize, setMaximumDetectionSize, setMinimumDetectionSize, setROI

Methods inherited from class java.lang.Object

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

Field Detail

scaleFactor

protected float scaleFactor

classifier

protected HOGClassifier classifier

Constructor Detail

HOGDetector

public HOGDetector(HOGClassifier classifier,
                   float scaleFactor)

HOGDetector

public HOGDetector(HOGClassifier classifier)

Method Detail

detect

public List<Rectangle> detect(FImage image)

Description copied from interface: ObjectDetector

Detect objects in the given image and return representations of them. Representations often cover things like the spatial location in the image of the detected object, however, this is implementation defined.

If no objects are detected, null or an empty list may be returned.

Parameters:

image - the image to detect the object in.

Returns:

a list of detections or null if none are found.

detectAtScale

protected void detectAtScale(int startX,
                             int stopX,
                             int startY,
                             int stopY,
                             float ystep,
                             int windowWidth,
                             int windowHeight,
                             List<Rectangle> results)

Perform detection at a single scale. Subclasses may override this to customise the spatial search. The given starting and stopping coordinates take into account any region of interest set on this detector.

Parameters:

startX - the starting x-ordinate

stopX - the stopping x-ordinate

startY - the starting y-ordinate

stopY - the stopping y-ordinate

ystep - the amount to step

windowWidth - the window width at the current scale

windowHeight - the window height at the current scale

results - the list to store detection results in