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.

Example

Original image

/sample.li/busystreet.jpg?w=800

Blurred faces

/sample.li/busystreet.jpg?w=800&blur_faces=1

$Photo alt \#responsive$

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). The filter is turned off by omitting it or using blur_faces=0.

Face blurring is most effective for images with enough spatial resolution and sufficiently high quality. For example, for crowd shots, the recommended size is at least 800 pixels.

Rounded corners

Watermarking

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