Tracked Barcode
Defined under the namespace Scandit.Datacapture.Barcode.Tracking
- TrackedBarcode
class TrackedBarcodeAdded in version 6.1.0
A barcode tracked over the course of multiple frames.
The state of a TrackedBarcode can be observed using a BarcodeTrackingListener.
The BarcodeTrackingListener.didUpdateSession() callback will be invoked every time a new frame is processed and at least one of the following events took place:
A track is established.
A track location has changed.
A track is lost and can no longer be tracked.
- location
get location(): Quadrilateral
Added in version 6.5.0
The location of the code. The coordinates are in image-space, meaning that the coordinates correspond to actual pixels in the image. For display, the coordinates need first to be converted into screen-space using the data capture view.
The meaning of the values of Quadrilateral.topLeft is such that the top left point corresponds to the top left corner of the barcode, independent of how the code is oriented in the image. Same for the other conrners.
Note
Using this property requires the MatrixScan AR add-on. In case the feature is not licensed, a quadrilateral with all corners set to 0, 0 is returned.
- deltaTime
get deltaTime(): number
Added in version 6.2.0
The time (in seconds) it will take the tracked barcode to move to the predictedLocation. This value can be used to animate the predicted change of location of the tracked barcode.
Deprecated since version 6.5.0: Replaced by location which returns a continuously interpolated location instead of the previously fixed future location.
- predictedLocation
get predictedLocation(): Quadrilateral
Added in version 6.1.0
The location where the tracked barcode is predicted to be in deltaTime.
Note
Using this property requires the MatrixScan AR add-on. In case the feature is not licensed, a quadrilateral with all corners set to 0, 0 is returned.
Deprecated since version 6.5.0: Replaced by location which returns a continuously interpolated location instead of the previously fixed future location.
- shouldAnimateFromPreviousToNextState
get shouldAnimateFromPreviousToNextState(): boolean
Added in version 6.2.0
True if it’s safe to animate from the current state to the next. As there are state transitions that do not guarantee a stable ordering of the location’s corners you should always check this property before animating a location change.