Search By Images instead of Keywords : Google Images

 We know Google Image Search is used to search required images by typing relative Keywords. But have you ever tried Search by Image feature in Google Images.

Its simple and awesome, if you have a pic of  photo which you want to search, present in your hard-disk and you want to search it, then simply drag the picture to Google images, as shown in below pic.

It first uploads the image which you dropped, after summing up it displays correct result, you can even use this to find names of unknown photos.