Coded to upload images

I need to import about a thousand images to my wordpress site and associate each group of images with particular pages. Is there any simple code that will upload an image so that it is associated with a particular page id? Its no problem for me to write the code to get the image name and path and page_id, I “just” need a simple call to upload what I have.

Otherwise I will have to use the media uploader in the editor to upload each pic one at a time, which will be slooooooow.

Thanks for any thoughts.