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# Detector Configuration Keys

Keys used in the options dictionary to configure a detector.

## Topics

### Constants

[`CIDetectorAccuracy`](/documentation/CoreImage/CIDetectorAccuracy)

A key used to specify the desired accuracy for the detector.

[`CIDetectorTracking`](/documentation/CoreImage/CIDetectorTracking)

A key used to enable or disable face tracking for the detector. Use this option when you want to track faces across frames in a video.

[`CIDetectorMinFeatureSize`](/documentation/CoreImage/CIDetectorMinFeatureSize)

A key used to specify the minimum size that the detector will recognize as a feature.

[`CIDetectorNumberOfAngles`](/documentation/CoreImage/CIDetectorNumberOfAngles)

The number of perspectives to use for detecting a face in video input.

[`CIDetectorMaxFeatureCount`](/documentation/CoreImage/CIDetectorMaxFeatureCount)

The key to the configuration dictionary whose value represents the maximum number of features the detector should return.


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