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# Detector Types

Strings used to declare the detector for which you are interested.

## Topics

### Constants

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

A detector that searches for faces in a still image or video, returning [`CIFaceFeature`](/documentation/CoreImage/CIFaceFeature) objects that provide information about detected faces.

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

A detector that searches for rectangular areas in a still image or video, returning [`CIRectangleFeature`](/documentation/CoreImage/CIRectangleFeature) objects that provide information about detected regions.

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

A detector that searches for Quick Response codes (a type of 2D barcode) in a still image or video, returning [`CIQRCodeFeature`](/documentation/CoreImage/CIQRCodeFeature) objects that provide information about detected barcodes.

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

A detector that searches for text in a still image or video, returning [`CITextFeature`](/documentation/CoreImage/CITextFeature) objects that provide information about detected regions.


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