These days it is not uncommon for many people to download/collect a large amount of images from Internet. Particularly after the immense popularity of online photo sharing services such as Flickr, Picasa, Smugmug and Zooomr this trend has increased drastically. And then there is a large number of photos that we take ourselves on regular basis thanks to the continuous trend of falling prices on higher resolution multi-megapixel digital cameras. Under most circumstances these pictures/photos tend ...