Copyright | (c) 2013-2017 Brendan Hay |
---|---|
License | Mozilla Public License, v. 2.0. |
Maintainer | Brendan Hay <brendan.g.hay+amazonka@gmail.com> |
Stability | auto-generated |
Portability | non-portable (GHC extensions) |
Safe Haskell | None |
Language | Haskell2010 |
Detects faces within an image (JPEG or PNG) that is provided as input.
For each face detected, the operation returns face details including a bounding box of the face, a confidence value (that the bounding box contains a face), and a fixed set of attributes such as facial landmarks (for example, coordinates of eye and mouth), gender, presence of beard, sunglasses, etc.
The face-detection algorithm is most effective on frontal faces. For non-frontal or obscured faces, the algorithm may not detect the faces or might detect faces with lower confidence.
For an example, see 'get-started-exercise-detect-faces' .
This operation requires permissions to perform the rekognition:DetectFaces
action.
- detectFaces :: Image -> DetectFaces
- data DetectFaces
- dfAttributes :: Lens' DetectFaces [Attribute]
- dfImage :: Lens' DetectFaces Image
- detectFacesResponse :: Int -> DetectFacesResponse
- data DetectFacesResponse
- dfrsOrientationCorrection :: Lens' DetectFacesResponse (Maybe OrientationCorrection)
- dfrsFaceDetails :: Lens' DetectFacesResponse [FaceDetail]
- dfrsResponseStatus :: Lens' DetectFacesResponse Int
Creating a Request
:: Image | |
-> DetectFaces |
Creates a value of DetectFaces
with the minimum fields required to make a request.
Use one of the following lenses to modify other fields as desired:
dfAttributes
- An array of facial attributes you want to be returned. This can be the default list of attributes or all attributes. If you don't specify a value forAttributes
or if you specify[DEFAULT]
, the API returns the following subset of facial attributes:BoundingBox
,Confidence
,Pose
,Quality
andLandmarks
. If you provide[ALL]
, all facial attributes are returned but the operation will take longer to complete. If you provide both,[ALL, DEFAULT]
, the service uses a logical AND operator to determine which attributes to return (in this case, all attributes).dfImage
- The image in which you want to detect faces. You can specify a blob or an S3 object.
data DetectFaces Source #
See: detectFaces
smart constructor.
Request Lenses
dfAttributes :: Lens' DetectFaces [Attribute] Source #
An array of facial attributes you want to be returned. This can be the default list of attributes or all attributes. If you don't specify a value for Attributes
or if you specify [DEFAULT]
, the API returns the following subset of facial attributes: BoundingBox
, Confidence
, Pose
, Quality
and Landmarks
. If you provide [ALL]
, all facial attributes are returned but the operation will take longer to complete. If you provide both, [ALL, DEFAULT]
, the service uses a logical AND operator to determine which attributes to return (in this case, all attributes).
dfImage :: Lens' DetectFaces Image Source #
The image in which you want to detect faces. You can specify a blob or an S3 object.
Destructuring the Response
Creates a value of DetectFacesResponse
with the minimum fields required to make a request.
Use one of the following lenses to modify other fields as desired:
dfrsOrientationCorrection
- The orientation of the input image (counter-clockwise direction). If your application displays the image, you can use this value to correct image orientation. The bounding box coordinates returned inFaceDetails
represent face locations before the image orientation is corrected.dfrsFaceDetails
- Details of each face found in the image.dfrsResponseStatus
- -- | The response status code.
data DetectFacesResponse Source #
See: detectFacesResponse
smart constructor.
Response Lenses
dfrsOrientationCorrection :: Lens' DetectFacesResponse (Maybe OrientationCorrection) Source #
The orientation of the input image (counter-clockwise direction). If your application displays the image, you can use this value to correct image orientation. The bounding box coordinates returned in FaceDetails
represent face locations before the image orientation is corrected.
dfrsFaceDetails :: Lens' DetectFacesResponse [FaceDetail] Source #
Details of each face found in the image.
dfrsResponseStatus :: Lens' DetectFacesResponse Int Source #
- - | The response status code.