Video Capture Interface

Simulate capture of images from video stream on hardware

Since R2021a

• 

Libraries:
SoC Blockset / Peripherals

Description

The Video Capture Interface block simulates the behavior of a video input device. The block emits the captured image in message for a connected Video Capture block that can be used in an algorithm. The block can also emit an event that, when connected a Task Manager block, can trigger a task containing the Video Capture block.

Ports

Input

data — Image data

3MN-length vector

Specify a 3MN-length vector as the unwrapped images matrices.

Dependencies

To enable this port, set the Input parameter to From input port.

Data Types: uint8

Output

event — Task event signal

scalar

This port sends a message at each new image event. This output connects to the input of the Task Manager block to execute the associated event-driven task after receiving the new image.

Dependencies

To enable this port, select the Show event port parameter.

Data Types: rteEvent

msg — SoC message data

scalar

This port outputs data messages containing image data to a connected Video Capture block.

Data Types: SoCData

Parameters

Input — Source of simulated video data

From dialog (default) | From input port | From timeseries object

Specify the source of the simulated image data.

Value — Image to be imported

uint8(floor(rand(1,3*160*120)*255)) (default) | 3MN-element vector

Specify the simulated image as a vector. The vector gets transformed into three M-by-N matrices representing the color channels of the image source.

Object name — Timeseries object name

[] (default) | MATLAB workspace variable

Specify the video source as a timeseries object in the MATLAB^® workspace.

Sample time — Sample time in seconds

-1 (default) | positive scalar

Enter the sample time defining the rate at which to output the message containing video data.

Show event port — Option to enable task event ports

off (default) | on

Select this parameter to enable an event port that, when connected to the Task Manager block, can execute event-driven tasks.

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

To automatically generate C code for your design, and execute on an SoC device, use the SoC Builder tool. To generate and execute C code for your SoC models, Embedded Coder^® features are required. For more information on generating code for SoC designs, see Use SoC Builder to Generate SoC Design.

Embedded Coder does not generate code for this block. In the generated code,the V4L2 driver framework performs the video capture on the device. The related Video Capture block represents the V4L2 driver. For more information on the V4L2 driver framework, see Video4Linux.

Version History

Introduced in R2021a