Web カメラ イメージの取得
webcam オブジェクトを作成してから、関数 snapshot を使用して Web カメラからイメージを取得します。単一のイメージを取得するか、ループを設定して複数のイメージを取得できます。関数 preview を使用してカメラ ストリームをテストします。
カメラへのプログラムによるアクセスが可能な場合は、解像度や明るさなどのデバイス固有のプロパティを設定できます。これらのプロパティは、デバイスによって異なります。カメラのプロパティを確認するには、webcam オブジェクトの作成時の出力を調べます。プロパティ設定の詳細については、Set Properties for Webcam Acquisitionを参照してください。
関数
webcamlist | List of webcams connected to your system |
webcam | Connection to a webcam |
preview | Preview live video data from webcam |
snapshot | Acquire single image frame from a webcam |
closePreview | Close webcam preview window |
propertyInfo | Retrieve metadata for webcam properties (R2024a 以降) |
ライブ エディター タスク
| Web カメラ イメージの取得 | Acquire snapshot from webcam in the Live Editor |
トピック
- Webcam Acquisition Overview
You can use MATLAB® webcam support to bring live images from any USB Video Class (UVC) compliant webcam into MATLAB. Supported platforms are listed here.
- Acquire Images from Webcams
To acquire images from a webcam, you first create a webcam object using the
webcamfunction. This example describes the typical workflow for acquiring images from webcams and bringing them into MATLAB. - Using Acquire Webcam Image Live Editor Task from Hardware Manager
You can use MATLAB Hardware Manager to detect your webcam and run the Acquire Webcam Image Live Editor task to interactively connect to your webcam, set its properties based on the live video, and capture images.
- Acquire Webcam Images in a Loop
The
snapshotfunction acquires a single image from a webcam. If you want to acquire images in a loop, you can do that with some extra programming. - Acquiring a Single Image in a Loop
This example shows how to use the
snapshotfunction to acquire live images from USB webcams. - Logging Video to Disk
This example shows how to use the
snapshotfunction to acquire live images and log the video to disk. - Set Properties for Webcam Acquisition
You can set object-specific properties for the
webcamobject to use with any webcam. You can also set device-specific properties for a specific webcam, if supported by your device.
注目の例
Detect and Plot Water Level Change with USB Webcam Live Editor Task
Set up your USB webcam to detect and plot the change in water level. Interactively capture images from a USB webcam using the Acquire Webcam Image task in the Live Editor. For more information on Live Editor tasks, see ライブ スクリプトへの対話型タスクの追加.
