Intrinsics

Provides information about the physical characteristics of the device camera.

Summary

Typedefs

ArCameraIntrinsics typedef
struct ArCameraIntrinsics_
The physical characteristics of a given camera.

Functions

ArCameraIntrinsics_create(const ArSession *session, ArCameraIntrinsics **out_camera_intrinsics)
void
Allocates a camera intrinstics object.
ArCameraIntrinsics_destroy(ArCameraIntrinsics *camera_intrinsics)
void
Releases the provided camera intrinsics object.
ArCameraIntrinsics_getFocalLength(const ArSession *session, const ArCameraIntrinsics *intrinsics, float *out_fx, float *out_fy)
void
Returns the focal length in pixels.
ArCameraIntrinsics_getImageDimensions(const ArSession *session, const ArCameraIntrinsics *intrinsics, int32_t *out_width, int32_t *out_height)
void
Returns the image's width and height in pixels.
ArCameraIntrinsics_getPrincipalPoint(const ArSession *session, const ArCameraIntrinsics *intrinsics, float *out_cx, float *out_cy)
void
Returns the principal point in pixels.

Typedefs

ArCameraIntrinsics

struct ArCameraIntrinsics_ ArCameraIntrinsics

The physical characteristics of a given camera.

Allocate with ArCameraIntrinsics_create()
Populate with ArCamera_getIntrinsics()
Release with ArCameraIntrinsics_destroy()

Functions

ArCameraIntrinsics_create

void ArCameraIntrinsics_create(
  const ArSession *session,
  ArCameraIntrinsics **out_camera_intrinsics
)

Allocates a camera intrinstics object.

ArCameraIntrinsics_destroy

void ArCameraIntrinsics_destroy(
  ArCameraIntrinsics *camera_intrinsics
)

Releases the provided camera intrinsics object.

ArCameraIntrinsics_getFocalLength

void ArCameraIntrinsics_getFocalLength(
  const ArSession *session,
  const ArCameraIntrinsics *intrinsics,
  float *out_fx,
  float *out_fy
)

Returns the focal length in pixels.

The focal length is conventionally represented in pixels. For a detailed explanation, please see http://ksimek.github.io/2013/08/13/intrinsic. Pixels-to-meters conversion can use SENSOR_INFO_PHYSICAL_SIZE and SENSOR_INFO_PIXEL_ARRAY_SIZE in the Android CameraCharacteristics API.

ArCameraIntrinsics_getImageDimensions

void ArCameraIntrinsics_getImageDimensions(
  const ArSession *session,
  const ArCameraIntrinsics *intrinsics,
  int32_t *out_width,
  int32_t *out_height
)

Returns the image's width and height in pixels.

ArCameraIntrinsics_getPrincipalPoint

void ArCameraIntrinsics_getPrincipalPoint(
  const ArSession *session,
  const ArCameraIntrinsics *intrinsics,
  float *out_cx,
  float *out_cy
)

Returns the principal point in pixels.

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