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Video To Workspace

Export image or video to MATLAB workspace

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  • Video To Workspace

Libraries:
Computer Vision Toolbox / Sinks

Description

The Video To Workspace block exports an image or video to the MATLAB® workspace. It accepts images or videos as a matrix, 3-D array, 4-D array and converts them to a 3-D or 4-D array. The input size determines the output size.

  • M-by-N, the block exports it as an M-by-N-by-2 array. M and N are the number of rows and columns, respectively, in an image frame and 2 is the number of frames in the image.

  • M-by-N-by-3, the block exports it as a M-by-N-by-3-by-2 array. M and N are the number of rows and columns in a image or video frame, 3 is the number of color channels, and 2 is the number of frames in the video.

  • M-by-N-by-3-by-T, the block exports it as a M-by-N-by-3-by-T array. M and N are the number of rows and columns in a video frame, 3 represents the number of color channels, and T is the number of frames in the video.

Note

  • Simulink® Coder™ does not generate code for this block.

  • The block supports grayscale and color images, which are exported to the MATLAB workspace with an extra dimension that represents the number of frames. An image is always exported with a frame value of 2.

Examples

Export Image to MATLAB Workspace

Export Image to MATLAB Workspace

How to export an image from Simulink to MATLAB workspace by using the Video To Workspace block.

Ports

Input

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The input image or video, specified as a matrix, 3-D array, or 4-D array. The type of signal determines the dimensions of the input. Inputs are defined in terms of M, N, C, and T. M and N are the number of rows and columns in the signal respectively. C is the number of color channels in the signal, and T is the number of frames.

Input - Output

Signal TypeInput DimensionsOutput Dimensions
Grayscale imageM-by-NM-by-N-by-2
Color image M-by-N-by-3M-by-N-by-3-by-2
Grayscale videoM-by-N-by-TM-by-N-by-T
Color video M-by-N-by-3-by-T M-by-N-by-3-by-T

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point

Red color channel of the input image or video, specified as a scalar, vector, or matrix.

Note

The port label can be changed using the Input port labels parameter.

Dependencies

To enable this port, set the Number of inputs parameter to a value greater than or equal to 2.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point

Green color channel of the input image or video, specified as a scalar, vector, or matrix.

Note

The port label can be changed using the Input port labels parameter.

Dependencies

To enable this port, set the Number of inputs parameter to a value greater than or equal to 2.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point

Blue color component of the input image or video, specified as a scalar, vector, or matrix.

Note

The port label can be changed using the Input port labels parameter.

Dependencies

To enable this port, set the Number of inputs parameter to a value equal to 3.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point

Parameters

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Specify the MATLAB workspace variable name for the exported image or video.

Specify the number of inputs to the block. To separate the color channels in a RBG image or video, specify the number of channels. If it is a grayscale video, enter 1. If it is a color (R, G, B) video, enter 3.

Specify the maximum number of frames to export to the MATLAB workspace.

Enter the decimation factor by which to downsample the image or video.

Select Log fixed-point data as a fi object to create a fi object in the MATLAB workspace when the input signal has a fixed point data type. For more information on fi objects, see fi (Fixed-Point Designer).

Name the input ports using the vertical bar character as a delimiter.

Dependencies

To enable this parameter, set the Number of inputs parameter to a value greater than 1.

Block Characteristics

Data Types

Boolean | double | fixed point | integer | single

Multidimensional Signals

yes

Variable-Size Signals

no

Version History

Introduced before R2006a

See Also

Blocks