How to programmatically remove the background from a photo?

Question

Image processing

there is a large set of photos where objects are taken against a white background. you need to remove the background so that it is more convenient to combine objects on a collage. Is there any way to programmatically remove the background from an image? the task is a little easier because the background is mostly white and the subject is usually located in the center. it seems there are a couple of programs that promise to do this, but I would like that in the future, when adding a photo to the service, the background is deleted automatically without the need to manually drive it into the program

Answer 1

php imagecolorallocate, imagecolortransparent, imagecolorexact
True, it is not clear what kind of service you have and what it is written on.