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FaceRectInfo structure (mfapi.h)

  • Article

The FaceRectInfo structure describes the blob format for the MF_CAPTURE_METADATA_FACEROIS attribute.

Syntax

typedef struct tagFaceRectInfo {
  RECT Region;
  LONG confidenceLevel;
} FaceRectInfo;

Members

Region

Relative coordinates on the frame that face detection is running (Q31 format).

confidenceLevel

Confidence level of the region being a face (0 - 100).

Remarks

The MF_CAPTURE_METADATA_FACEROIS attribute contains the face rectangle info detected by the driver. By default driver\MFT0 should provide the face information on preview stream. If the driver advertises the capability on other streams, driver\MFT must provide the face info on the corresponding streams if the application enables face detection on those streams. When video stabilization is enabled on the driver, the face information should be provided post-video stabilization. The dominate face must be the first FaceRectInfo in the blob.

The FaceRectInfoBlobHeader and FaceRectInfo structures only describe the blob format for the MF_CAPTURE_METADATA_FACEROIS attribute. The metadata item structure for face ROIs (KSCAMERA_METADATA_ITEMHEADER + face ROIs metadata payload) is up to driver and must be 8-byte aligned.

Requirements

Requirement Value
Header mfapi.h