What mobile phone software can cover the background of photos?

Meitu Xiu Xiu, blurred background or mosaic.

Related functions:

Mosaic:

It is a decorative art, which usually uses many small stones or colored glass fragments to make patterns. The glass art in the church is also called stained glass. During the Byzantine Empire, with the rise of Christianity, mosaics developed into murals in churches and palaces. Now, mosaic refers to this colorful visual effect.

Blurred background:

The larger the zoom magnification, the more obvious the blur effect. The aperture of some cameras can't be set as a constant aperture, and the aperture is shrinking when the zoom factor increases, so the blur effect is not good.

cutout

This is one of the most common operations in image processing. Accurately extracting the required part of an image from a picture is called matting, which is an important basis for subsequent image processing. A matting can cut a part of a picture and combine it with another background. Then two desired images are combined together, and matting technology is widely used in movies and TV series to synthesize fantasy pictures.

Common matting methods are: channel matting, quick matting and pen matting.