An observation that provides the recognized feature print.
Members (10)
get · iOS 18.0+
confidence
TypeScript
get confidence(): number
Swift declaration
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
get · iOS 18.0+
description
TypeScript
get description(): string
Swift declaration
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.
get · iOS 18.0+
elementType
TypeScript
get elementType(): ElementType
Swift declaration
let elementType: ElementType
The type of each element in the data.
get · iOS 18.0+
elementCount
TypeScript
get elementCount(): number
Swift declaration
let elementCount: Int
The total number of elements in the data.
get · iOS 18.0+
originatingRequestDescriptor
TypeScript
get originatingRequestDescriptor(): (RequestDescriptor) | null
Swift declaration
let originatingRequestDescriptor: RequestDescriptor?
The descriptor of the request that produced the observation.
get · iOS 18.0+
data
TypeScript
get data(): ArrayBuffer
Swift declaration
let data: Data
The feature print data.
The data is divided into separate elements. Determine the type of element using ``elementType``, and the number of elements
using ``elementCount``.
get · iOS 18.0+
uuid
TypeScript
get uuid(): string
Swift declaration
let uuid: UUID
The unique identifier for the observation.
method · iOS 18.0+
distance
TypeScript
distance(featurePrint: FeaturePrintObservation): number
Computes the distance between two feature print observations.
Shorter distances indicate greater similarity between feature prints.
- Parameters:
- featurePrint: The feature print object to calculate the distance to.
get · iOS 18.0+
timeRange
TypeScript
get timeRange(): (_CoreMedia_CMTimeRange) | null
Swift declaration
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.