The “paste” method in PIL is used to paste an image onto another. It requires two parameters: the image to be pasted and a tuple defining the upper left corner where it will be placed. An optional third parameter can specify a mask image that determines transparency levels for the pasted image.
A practical application of this method could be watermarking images. For instance, you have a logo (watermark) that needs to be applied on multiple photos. You load both the photo and the watermark into PIL, then use the “paste” method to apply the watermark at a specific position on each photo. The mask parameter can be utilized to adjust the opacity of the watermark, making it semi-transparent so as not to completely obscure the underlying photo.
