MoCA Project: Last edited 04.07.1998, Author: Rainer Lienhart

Automatic Movie Content Analysis    

segment

Description

Segments artifical text appearances in videos (typical frame dimensions 360x270 and 352x240)

Options

-videoDir path to movie required
-videoName name of video file required
-mdir root directory for all intermediate and final results  
default: <videoDir>/measurements/
optional
-from number of the first frame
default: number of the first frame of the video
optional
-to number of the last frame;
default: number of last frame of the video
optional
-seggerade 
 
color segmentation: color difference threshold for region growing to the left, right, top and bottom. 
default: 2000
optional
-segdiag color segmentation: color difference threshold for region growing in corner direction 
default: 1600
optional
-merge color segmentation: color distance threshold for region merging 
default: 1800
optional
-mergeGraOri on/off switch for color segmentation  
0 = don't merge regions by gradient and orientation information 
1 = merge regions by gradient and orientation information 
default: 1
optional
-klassSize on/off switch
0 = perform no geometry analysis
1 = perform geometry analysis
default: 1
optional
-klassKon on/off switch
0 = perform no contrast analysis
1 = perform contrast analysis
default: 1
optional
-klassTextur on/off switch
0 = perform no texture analysis
1 = perform texture analysis
default: 1
optional
-track on/off switch
0 = perform no motion analysis
1 = perform motion analysis
default: 1
optional
 

Example

segment -videoDir /opt/Movies/ForrestGump/ -videoName ForrestGump.mpg -from 1000 -to 1500

As a result four directories will be created containing lots of MoCA images:

    /opt/Movies/ForrestGump/measurements/seg
    /opt/Movies/ForrestGump/measurements/trc
    /opt/Movies/ForrestGump/measurements/bil
    /opt/Movies/ForrestGump/measurements/end
They contain images of the following type:
  • ../measurements/seg contains the text-segmented images right before motion analysis is applied.
  • ../measurements/trc contains the final segmentation result
  • the other directories can be ignored.
Before the images can be viewed they must be transformed and saved as JPEG images. Use mocashow to convert the MoCA image to JPEG images:
    cd /opt/Movies/ForrestGump/ measurements/trc
    mocashow *.trc.moca.gz
NOTE: Besides segment also track and gzip/gunzip must be installed on your system. They are called by segment.
 
 
© 1998  Rainer Lienhart@informatik.uni-mannheim.de