How to remove the blue background of QQ space

In photoshop, use another background picture you like as the background color, move the picture you want to remove the background to the background picture, and cover the unwanted foreground with gradient, so that the picture will appear natural and artistic.

The most common matting is to select the picture to be matting with magic wand, and then remove the background color with anti-selection tool.

You can add me Q675 107075 if you don't understand.