The computer vision api allows you to upload an Image and it would in turn give you a description of the Image. For Example, if you upload an Image of you at the beach, it would probably say- Sea, Blue, Sand, Outdoors etc.
It can describe things and the surroundings. You could also play around with the existing Images that they have at their website and see what output you get.
Please note that this is only one of the features of a whole myriad of features that the Computer Vision API has. I would be discussing the rest in my upcoming blogs, so STAY TUNED!!
Please visit this website https://azure.microsoft.com/en-us/services/cognitive-services/computer-vision/ and check this feature out!