Description

TheVideo From Workspaceblock imports a video signal from the MATLAB^®workspace. If the video signal is a M-by-N-by-T workspace array, the block outputs an intensity video signal, where M and N are the number of rows and columns in a single video frame, and T is the number of frames in the video signal. If the video signal is a M-by-N-by-C-by-T workspace array, the block outputs a color video signal, where M and N are the number of rows and columns in a single video frame, C is the number of color channels, and T is the number of frames in the video stream. In addition to the video signals previously described, this block supports fi objects.

For the Computer Vision System Toolbox™ blocks to display video data properly, double- and single-precision floating-point pixel values must be from 0 to 1. This block does not scale pixel values.

Use theSignalparameter to specify the MATLAB workspace variable from which to read. For example, to read an AVI file, use the following syntax:

mov = VideoReader('filename.avi')

Iffilename.avihas a colormap associated with it, the AVI file must satisfy the following conditions or the block produces an error:

Use theSample timeparameter to set the sample period of the output signal.

When the block has output all of the available signal samples, it can start again at the beginning of the signal, repeat the final value, or generate 0s until the end of the simulation. TheForm output after final value byparameter controls this behavior:

Use theImage signalparameter to specify how the block outputs a color video signal. If you selectOne multidimensional signal, the block outputs an M-by-N-by-P color video signal, where P is the number of color planes, at one port. If you selectSeparate color signals, additional ports appear on the block. Each port outputs one M-by-N plane of an RGB video stream.

Use theOutput port labelsparameter to label your output ports. Use the spacer character, |, as the delimiter. This parameter is available when theImage signalparameter is set toSeparate color signals.

Parameters

See Also