[Image-SIG] Adding a URL (text) to an image

[Tony Cappellini]

Are there any examples of python scripts doing basic image editing like
resizing a directory of files, or adding some text to an image, online ?

I'd like to overlay a url(text only) onto some images.
Depending on the image background color, I would need to change the color
of the text.

Is this technique of adding text to a graphic image called, watermarking,
merging, or ??? in the graphics editing world?

thanks