Face blurring

blur_faces=1

blur_faces=TH,R,S,CR

For censorship or privacy, you can use the blur_faces filter which will fog all faces found in the image by applying Gaussian blur.

Examples

Available options

parameter description default value description
TH threshold of the face detection algorithm 0.15 threshold of the face detection algorithm
R blur radius 30
S blur sigma (Gaussian distribution) 1000
CR corner radius of the masking shape
(use max for an ellipse)
0 corner radius of the masking shape
use max for an ellipse

If you are unsure which settings you should use, you can start with default values (blur_faces=1).

Face blurring is most effective for images with enough spatial resolution and sufficiently high quality - images larger than 300 pixels and with enough detail.