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JavaScript API Reference - BarcodeScanner Interfaces

Interface Description
FrameFilter Filter and discard video frames while focusing.
ScannerPlayCallbackInfo Stores the height and width constraints of the video stream.
ScanSettings Configures the video stream settings.
VideoDeviceInfo Stores the video device information.

FrameFilter

Filter and discard video frames that are out of focus during the scanning operation.

Properties

Property Type Default Value Description
regionoptional RegionDefinition <pre>{ regionLeft = 0,
regionRight = 100,
regionTop = 0,
regionBottom = 100,
regionMeasuredByPercentage = true }</pre>
Detecting area of a frame.
thresholdoptional number 0.1 Threshold used for filtering images.
Value range: [0, 1].
An indicator is calculated for each frame from AppendFrame(). If the change rate of the indicators between the current frame and historic frames is larger than this threshold, the current frame will be discarded.

ScannerPlayCallbackInfo

Stores the height and width constraints of the video stream.

Properties

Property Type Description
height number The height of the video.
width number The width of the video.

ScanSettings

Configures the video stream settings. Previously known as ScannerConfig.

Properties

Property Type Default Value Description
duplicateForgetTimeoptional number 3000 Ignore duplicated results found in the specified time period. Measured in ms.
frameFilteroptional FrameFilter   Filter and discard video frames that are out of focus.
intervalTimeoptional number 100 Scan interval used to allow the library to release the CPU periodically. Measured in ms.

VideoDeviceInfo

Stores the video device information.

Properties

Property Type Description
deviceId string Identifier for the represented device that is persisted across sessions. It is un-guessable by other applications and unique to the origin of the calling application. It is reset when the user clears cookies.
label string The label describing the device.

This page is compatible for:

Version 7.5

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