Video and Image Processing Blockset 3.0

Video I/O, Visualization, and Graphics

Sources and Sinks

Video and Image Processing Blockset can read and write multimedia files in a wide range of formats, such as AVI, MPEG, and WMA. You can stream video to or from MMS sources over the Internet or a local network. You can acquire video directly from Web cameras, frame grabbers, DCAM-compatible cameras, and other imaging devices using Image Acquisition Toolbox™. Simulink users can also use the MATLAB workspace as a video source or sink.

Visualization

The blockset includes a flexible video viewer with many features. You can:

• View video streams in-the-loop as the data is being processed
• View any video signal within your simulation
• Use multiple video viewers at the same time
• Start, stop, pause, and step through simulations one frame at a time
• Freeze the display and evaluate the current frame
• Display pixel information for a region in the frame
• Pan and zoom for closer inspection as the simulation is running

A model with viewers for four videos: original, background estimate, segmentation results, and model output.

Graphics

Adding graphics to video often helps with visualizing extracted information or debugging problems with a system design. You can insert text in order to count objects or keep track of other key information. You can insert graphics such as markers, lines, and polygons to delineate objects, important boundaries, or other key features. Inserted text and graphics are incorporated into the data itself rather than as a separate layer. You can also combine two video sources in a composite that can highlight objects or focus attention on a key region.

Images with text and graphics inserted. Adding these elements can help you visualize extracted information and debug your design.