Type Alias


An option key passed into VNImageRequestHandler creations or requests that take an auxiliary image.


typedef NSString *VNImageOption;


Pass an option key into the VNImageRequestHandler instance on creation or request. Option keys are used to describe specific properties of an image or specify how an image needs to be handled.


Options Dictionary Keys


The dictionary from CGImageSourceCopyPropertiesAtIndex containing metadata for algorithms like horizon detection.


An option to specify the camera intrinstics as an NSData or CFDataRef object representing a matrix_float3x3.


An option key to specify the CIContext to be used in the handler's Core Image operations.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software