TrajectoryObservation

confidence

get confidence(): number

let confidence: Float

The level of confidence normalized to `[0, 1]` where `1` is most confident. The only exception is results coming from `CoreMLRequest`, where confidence values are forwarded as is from relevant CoreML models

description

get description(): string

var description: String { get }

A textual representation of this instance. Calling this property directly is discouraged. Instead, convert an instance of any type to a string by using the `String(describing:)` initializer. This initializer works with any type, and uses the custom `description` property for types that conform to `CustomStringConvertible`: struct Point: CustomStringConvertible { let x: Int, y: Int var description: String { return "(\(x), \(y))" } } let p = Point(x: 21, y: 30) let s = String(describing: p) print(s) // Prints "(21, 30)" The conversion of `p` to a string in the assignment to `s` uses the `Point` type's `description` property.

detectedPoints

get detectedPoints(): Array<NormalizedPoint>

let detectedPoints: [NormalizedPoint]

The centroid points of the detected contour along the trajectory. The detected points may differ slightly from the ideal trajectory because they fall within the allowed tolerance. The system limits the maximum number of points based on the maximum trajectory length set in the request.

projectedPoints

get projectedPoints(): Array<NormalizedPoint>

let projectedPoints: [NormalizedPoint]

The centroids of the calculated trajectory from the detected points. The projected points define the ideal trajectory described by the parabolic equation. The equation’s coefficients and the projected points of the detected trajectory get refined over time. The system limits the maximum number of cached points to the maximum points needed to describe the trajectory together with the parabolic equation.

movingAverageRadius

get movingAverageRadius(): number

let movingAverageRadius: CGFloat

The moving average radius of the object the request is tracking.

equationCoefficients

get equationCoefficients(): SDKHandle

let equationCoefficients: simd_float3

The coefficients of the parabolic equation. This equation describes the parabola on which the detected contour is traveling. The equation and the projected points get refined over time.

originatingRequestDescriptor

get originatingRequestDescriptor(): (RequestDescriptor) | null

let originatingRequestDescriptor: RequestDescriptor?

The descriptor of the request that produced the observation.

uuid

get uuid(): string

let uuid: UUID

The unique identifier for the observation.

timeRange

get timeRange(): (_CoreMedia_CMTimeRange) | null

let timeRange: CMTimeRange?

The time range of the reported observation. When evaluating a sequence of image buffers, use this property to determine each observation’s start time and duration.

init

static init(observation: VNTrajectoryObservation): TrajectoryObservation

init(_ observation: VNTrajectoryObservation)