AndroidFaceCropper

To automatically crop faces from an image, instantiate the FaceCropper class and call getCroppedImage(). The getCroppedImage method accepts either a Bitmap object or an int representing a drawable resource ID.

FaceCropper mFaceCropper = new FaceCropper();
// Using a Bitmap
mFaceCropper.getCroppedImage(sourceBitmap);

// Or using a drawable resource ID
mFaceCropper.getCroppedImage(R.drawable.my_image);

You can fine-tune the face detection and cropping logic using the following configuration methods:

• setMaxFaces(int faces): Sets the maximum number of faces to be recognized.
• setFaceMinSize(int faceMinSize): Sets the minimum face size in pixels.
• setFaceMarginPx(int faceMarginPx): Sets the margin in pixels to be applied to each side of the cropped face.
• setEyeDistanceFactorMargin(float eyeDistanceFactorMargin): Sets a multiplier based on the distance between the detected eyes to adjust the crop area.
• setDebug(boolean debug): Enables drawing red circles over detected faces for debugging purposes.

To visualize the detection process, use getFullDebugImage(Bitmap bitmap). This returns a version of the original, non-cropped image where detected faces are painted with red circles and the calculated cropped areas are painted in green.

Bitmap debugBitmap = mFaceCropper.getFullDebugImage(originalBitmap);