User`s guide

Version 2.4 (R2007b ) Video and Image Processing Blockset™
Demo Title New Library Location Old Library Location
Histogram Display
Display and Graphics Video Analysis
MPlay Simulin k
Tutorial
Display and Graphics
Video Playback
Object E xtraction and
Replacement
Display and Graphics Video Segmentation
Using Morphology
Picture in Picture
Display and Graphics
Miscellaneous
Projecting Videos onto
aRotatingCube
Display and Graphics Geometric
Transformation
Visual Effects Display and G rap h ics
Miscellaneous
Edge Detection with
Live Video A cquisition
Live Video Processing
Video Analysis
Histogram Display with
Live Video A cquisition
Live Video Processing
Video Analysis
Lucas-Kanade Method of Optical Flow Block
Enhanced
The Optical Flow block now has tw o options for solving the optical flow
constraint equation when you set the Method parameter to
Lucas-Kanade:
•
Difference filter [-1 1] — This was the only option available in
previou s release s , and is the default option.
•
Derivative of Gaussian — This option is new in this release.
Use the new Temporal gradient filter parameter to select the filter option.
The Optical Flow block supports fixed-point data types when the Method
parameter is set to
Lucas-Kanade and the Temporal gradient filter
parameter is set to
Difference filter [-1 1].
For more information about these enhancements, see the O ptical Flow block
reference page.
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