Need some help. i recently gave a picture of my dog to a guy who is a graphic artist. after he gave it back to me, he applied a filter of some sort to it that made it look cartoonish. i attached that image so you guys can see what im talking about.

can someone help me on how he was able to do this to the picture. what filter if any did he use? i would like to be able to do this to alot of my images in the future but dont know how and cant seem to find out how to do it. Any help would be greatly appreciated!

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