Technique | VideoText |
---|---|
Document | MPEG-7 Working Draft MDS |
Name | Chitra Dorai, Ruud Bolle (IBM T.J. Watson Research Center, New York, USA) Nevenka Dimitrova, Lalitha Agnihotri (Philips Research, New York, USA) |
dorai@watson.ibm.com | |
Contact | Chitra Dorai at IBM or Nevenka Dimitrova/Lalitha Agnihotri at Philips |
Type | Application |
External Libraries | NONE |
Related Ds/DSs | VideoText DS |
Input | MPEG-Video (foo.mpg) |
Output | foo.xml (in the directory specified with the -b option in the XMWinExe command), additionally, to any file specified with the -b option, (e.g., to videotext.xml, if specified -btestdir/videotext.xml) |
Extraction | Yes (IBMVideoTextServer) |
Client Appl | IBMVideoTextEventBrowserDemoForMPEG-7 Application |
Summary | The IBM videotext extraction algorithm works by extracting and analyzing regions in a video frame. The processing stages are (i) isolating regions that may contain text characters, (ii) separating each character region from its surroundings and (iii) verifying the presence of text by consistency analysis across multiple text blocks. |
Strong Points | The extraction algorithm does very well with low miss rates, by not missing many of the true text lines in the frame |
Limitations | NONE |
Known Problems | Can't handle images larger than HDTV resolution |
Parameters | The IBMVideoTextServer is coded to handle HDTV frame sizes, 1920x1080. Changing MAX_SIZE in IBMVideoTextdataTypes.h can customize this and change related constants found in the same file. |