Google’s Search by Image: Something to look at « NeverEndingSearch | Eclectic Technology | Scoop.it

Google has many ways to search, and one way that many folks are not aware of is the small camera icon that allows you to drag in or upload an image (or paste in a URL) and have the search be for the image. 
There are additional features also available. You may choose a color palette to minimize the number of images shown and also search by date, size, type of image and more.

This post provides additional details as well as screen shots to help you out.