org.openimaj.video.processing.shotdetector

Class LocalHistogramVideoShotDetector

java.lang.Object

org.openimaj.video.Video<T>

org.openimaj.video.processor.VideoProcessor<I>

org.openimaj.video.processing.shotdetector.VideoShotDetector<MBFImage>

org.openimaj.video.processing.shotdetector.LocalHistogramVideoShotDetector

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<MBFImage>, VideoDisplayListener<MBFImage>

@Reference(type=Inproceedings,
           author={"{S}teiner, {T}homas","{V}erborgh, {R}uben","{G}abarr{\'o} {V}all{\'e}s, {J}oaquim","{T}roncy, {R}apha{\"e}l","{H}ausenblas, {M}ichael","{V}an de {W}alle, {R}ik","{B}rousseau, {A}rnaud"},
           title="{E}nabling on-the-fly video shot detection on {Y}ou{T}ube",
           year="2012",
           booktitle="{WWW} 2012, 21st {I}nternational {W}orld {W}ide {W}eb {C}onference {D}eveloper\'s {T}rack, {A}pril 16-20, 2012, {L}yon, {F}rance",
           url="http://www.eurecom.fr/publication/3676",
           month="04",
           customData={"address","{L}yon, {FRANCE}"})
public class LocalHistogramVideoShotDetector
extends VideoShotDetector<MBFImage>

A shot detector implementing the Steiner et al. local histogram comparison.

Version:

$Author$, $Revision$, $Date$

Author:

David Dupplaw (dpd@ecs.soton.ac.uk)

Field Summary

Fields inherited from class org.openimaj.video.processing.shotdetector.VideoShotDetector

lastFrameWasBoundary, threshold

Constructor Summary

Constructors

Constructor and Description
LocalHistogramVideoShotDetector(int nGridElements) If you use this constructor, your timecodes will be messed up unless you call VideoShotDetector.setFPS(double) before you process any frames.
LocalHistogramVideoShotDetector(Video<MBFImage> video, int nGridElements)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	drawBoxes(MBFImage img, double[][] sim) Draws the boxes to show movements.
protected double	getInterframeDistance(MBFImage frame) Returns the inter-frame distance between this frame and the last.

Methods inherited from class org.openimaj.video.processing.shotdetector.VideoShotDetector

addShotDetectedListener, afterUpdate, beforeUpdate, fireDifferentialCalculated, fireShotDetected, getDifferentials, getLastKeyframe, getLastShotBoundary, getShotBoundaries, getThreshold, process, processFrame, removeShotDetectedListener, reset, setFindKeyframes, setFPS, setStoreAllDifferentials, setThreshold, wasLastFrameBoundary

Methods inherited from class org.openimaj.video.processor.VideoProcessor

countFrames, getCurrentFrame, getFPS, getHeight, getNextFrame, getTimeStamp, getWidth, hasNextFrame, process, processingComplete

Methods inherited from class org.openimaj.video.Video

close, getCurrentFrameIndex, iterator, seek, setCurrentFrameIndex

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalHistogramVideoShotDetector

public LocalHistogramVideoShotDetector(int nGridElements)

If you use this constructor, your timecodes will be messed up unless you call VideoShotDetector.setFPS(double) before you process any frames.

Parameters:

nGridElements - The number of x and y grid elements (there will be this number squared in total)

LocalHistogramVideoShotDetector

public LocalHistogramVideoShotDetector(Video<MBFImage> video,
                               int nGridElements)

Parameters:

video - The video to process

nGridElements - The number of x and y grid elements (there will be this number squared in total)

Method Detail

getInterframeDistance

protected double getInterframeDistance(MBFImage frame)

Returns the inter-frame distance between this frame and the last.

Specified by:

getInterframeDistance in class VideoShotDetector<MBFImage>

Returns:

The inter-frame distance

See Also:

VideoShotDetector.getInterframeDistance(org.openimaj.image.Image)

drawBoxes

protected void drawBoxes(MBFImage img,
             double[][] sim)

Draws the boxes to show movements.

Parameters:

img - The image to draw to