AWSRekognitionFace Class Reference

Inherits from AWSModel : AWSMTLModel
Declared in AWSRekognitionModel.h
AWSRekognitionModel.m

Overview

Describes the face properties such as the bounding box, face ID, image ID of the source image, and external image ID that you assigned.

  boundingBox

Identifies the bounding box around the object or face. The left (x-coordinate) and top (y-coordinate) are coordinates representing the top and left sides of the bounding box. Note that the upper-left corner of the image is the origin (0,0).

The top and left values returned are ratios of the overall image size. For example, if the input image is 700x200 pixels, and the top-left coordinate of the bounding box is 350x50 pixels, the API returns a left value of 0.5 (350/700) and a top value of 0.25 (50/200).

The width and height values represent the dimensions of the bounding box as a ratio of the overall image dimension. For example, if the input image is 700x200 pixels, and the bounding box width is 70 pixels, the width returned is 0.1.

The bounding box coordinates can have negative values. For example, if Amazon Rekognition is able to detect a face that is at the image edge and is only partially visible, the service can return coordinates that are outside the image bounds and, depending on the image edge, you might get negative values or values greater than 1 for the left or top values.

@property (nonatomic, strong) AWSRekognitionBoundingBox *boundingBox

Declared In

AWSRekognitionModel.h

  confidence

Confidence level that the bounding box contains a face (and not a different object such as a tree).

@property (nonatomic, strong) NSNumber *confidence

Declared In

AWSRekognitionModel.h

  externalImageId

Identifier that you assign to all the faces in the input image.

@property (nonatomic, strong) NSString *externalImageId

Declared In

AWSRekognitionModel.h

  faceId

Unique identifier that Amazon Rekognition assigns to the face.

@property (nonatomic, strong) NSString *faceId

Declared In

AWSRekognitionModel.h

  imageId

Unique identifier that Amazon Rekognition assigns to the source image.

@property (nonatomic, strong) NSString *imageId

Declared In

AWSRekognitionModel.h