Google Image searches by uploading images from our computers. This morning, through Mashable, I learned about a neat image search tool that allows you to draw an image and search for images that are similar to it.
The Unofficial Google Image Search by Drawing tool provides you with a drawing space and some simple drawing tools to create a sketch. When your sketch is complete just click "search by drawing" and you'll be sent to the Google Image search results that best match your drawing.
The Unofficial Google Image Search by Drawing tool can also be used to upload and draw on an image that you have stored on your computer. If you want to search for pictures of yourself or pictures of people that look like you, you can use your webcam to take a picture of yourself and search through the Unofficial Google Image Search by Drawing tool.
Embedded below is Mashable's video overview of the Unofficial Google Image Search by Drawing tool.
Applications for Education
This approach to image search could be useful for students who have an idea for an image, but can't quite find it by using search terms in Google Image search.