Google have upgraded the image search with a new concept similar to Google goggles.Now you can upload images to Google and search the images similar to yours, Google search engine will find the closest match to your image from the web and displays it.
Steps to Google search by image
If you use modern browser like chrome you can easily drag images in your computer and drop in the search bar.
Choose file and then click search.
You can also enter the image URL to search the similar image.