WEBCAM creates webcam object to acquire frames from your webcam.
CAMOBJ = WEBCAM returns a webcam object, CAMOBJ, that acquires images
from the specified webcam. By default, this selects the first
available webcam returned by WEBCAMLIST.
CAMOBJ = WEBCAM(DEVICENAME) returns a webcam object, CAMOBJ, for
webcam with the specified name, DEVICENAME. The webcam name can be
found using the function WEBCAMLIST.
CAMOBJ = WEBCAM(DEVICEINDEX) returns a webcam object, CAMOBJ, for
webcam with the specified device index, DEVICEINDEX. The webcam device
index is the index into the cell array returned by WEBCAMLIST.
CAMOBJ = WEBCAM(..., P1, V1, P2, V2,...) constructs the webcam object,
CAMOBJ, with the specified property values. If an invalid property
name or property value is specified, the webcam object is not created.
Creating WEBCAM object obtains exclusive access to the webcam.
SNAPSHOT method syntax:
IMG = snapshot(CAMOBJ) acquires a single frame from the webcam.
[IMG, TIMESTAMP] = snapshot(CAMOBJ) returns the frame, IMG, and the
acquisition timestamp, TIMESTAMP.
WEBCAM methods:
snapshot - Acquire a single frame from the webcam.
preview - Activate a live image preview window.
closePreview - Close live image preview window.
WEBCAM properties:
Name - Name of the webcam.
Resolution - Resolution of the acquired frame.
AvailableResolutions - Cell array of list of available resolutions.
The WEBCAM interface also supports the dynamic properties of the webcam
that we can access programmatically. Some of these dynamic properties
are Brightness, Contrast, Hue, Exposure etc. The presence of these
properties in the WEBCAM object depends on the webcam that you connect
to. Dynamic properties are not supported when using webcam in MATLAB
Online.
Example:
% Construct a webcam object
camObj = webcam;
% Preview a stream of image frames.
preview(camObj);
% Acquire and display a single image frame.
img = snapshot(camObj);
imshow(img);
See also WEBCAMLIST, SNAPSHOT, PREVIEW
Documentation for webcam
helpwin webcam
Other uses of webcam
webcam/webcam
