Google has begun rolling out a long awaited for improvement to their Image Search, and they're calling it "Search By Image"; basically, this is a search where you start with an image and find out where it originated, what it's actually capturing, who might have taken the image, etc. This is very similar to what TinEye has been doing for several years (with much success, I might add).
Here's how Google's Search by Image works. Since they are rolling this out one datacenter at a time, you might not have this enabled from where you're using Google quite yet; you'll know if you do when you see a camera icon in the images.google.com search bar.
- Find an image you want to research, either from your computer or from the Web.
- Find the camera icon, click on it, and select "Upload An Image".
- If you've found an image on the Web that you're interested in, right-click on it to copy its unique URL, then click the camera icon and select "Paste Image URL".
More ways to find images on the Web
Thirty Sources for Free Images Online: Whether you're creating a website or sending out a family newsletter, here are 30 resources for absolutely free images online.