You can use blur parameters to blur a source image stored in Object Storage Service (OSS). This topic describes the parameters and examples to blur an image.


Operation name: blur

The following table describes the parameters that you can configure to blur an image.

Parameter Required Description Valid value
r Yes Specifies the blur radius. [1,50]

A greater value indicates a blurrier image.

s Yes Specifies the standard deviation of a normal distribution. [1,50]

A greater value indicates a blurrier image.


An image in the bucket named image-demo in the China (Hangzhou) region is used in the following examples. The following URL is used to access the image over the Internet:

If you set the r parameter to 3 and the s parameter to 2, the URL used to process the image is in the following format:,r_3,s_2