webcam

Connection to web camera

Add-On Required: This feature requires the MATLAB Support Package for Raspberry Pi Hardware add-on.

Description

This object represents a connection from the MATLAB^® software to a web camera attached to the Raspberry Pi hardware. To create this object, use the webcam function. To configure the web camera settings, use the object properties listed in Properties. To interact with the web camera, use this object with the functions listed in Object Functions.

Creation

webcam

Properties

Resolution — Image dimensions

string

This property is read-only.

Image dimensions, specified as a string.

Example: '640x480'

Data Types: char

AvailableResolutions — Image dimensions available for this web camera

cell

This property is read-only.

Image dimensions, specified as a cell array of strings.

When you create the webcam object, you can specify this value.

Example: {'320x240' '640x480'}

Data Types: char

Object Functions

snapshot

Capture latest RGB image frame from Camera Board or selected camera on ArduCam Multi Camera Adapter Module

Examples

Use the Web Camera

You can connect from the MATLAB software to the USB web camera connected to Raspberry Pi board and take a photograph.

Create a connection from the MATLAB to the Raspberry Pi^® board. If you encounter errors after running the above command, try using additional arguments (as listed in raspi) or refer to Troubleshoot Connecting Issues to Raspberry Pi Hardware.

mypi = raspi;

Create a connection from the MATLAB software to the Raspberry Pi hardware.

mypi = raspi;

Create a connection, wcam, from the MATLAB software to the USB web camera connected to the Raspberry Pi board, and set the image resolution. The connection displays the web camera properties.

wcam = webcam(mypi)

wcam = 

  webcam with properties:

                    Name: "/dev/video0"
              Resolution: "320x240"
    AvailableResolutions: {"320x240"  "640x480"}

Import and display a sequence of 10 snapshots on your host computer.

for ii = 1:10
    img = snapshot(wcam);
    imagesc(img)
    drawnow
end

Version History

Introduced in R2016a