Class

AVCameraCalibrationData

Information about the camera characteristics used to capture images and depth data.

Declaration

@interface AVCameraCalibrationData : NSObject

Overview

Information about the calibration of a camera—such as its pixel focal length, principal point, and lens distortion characteristics—helps to determine the geometric relationships between the camera device and the images it captures. You can use this information to accurately render visual effects into images produced by a camera or perform computer vision tasks such as correcting images for geometric distortions.

Topics

Mapping Pixels to Scene Geometry

intrinsicMatrix

A matrix relating a camera's internal properties to an ideal pinhole-camera model.

intrinsicMatrixReferenceDimensions

The image dimensions to which the camera's intrinsic matrix values are relative.

extrinsicMatrix

A matrix relating a camera's position and orientation to a world or scene coordinate system.

pixelSize

The size, in millimeters, of one image pixel.

Correcting for Lens Distortion

lensDistortionLookupTable

A map of floating-point values describing radial distortions imparted by the camera lens, for use in rectifying camera images.

inverseLensDistortionLookupTable

A map of floating-point values describing radial distortions for use in reapplying camera geometry to a rectified image.

lensDistortionCenter

The offset of the distortion center of the camera lens from the top-left corner of the image.

Relationships

Inherits From

See Also

Using Calibration Data

cameraCalibrationData

The imaging parameters with which this depth data was captured.