How Photo Filters Affect Online Engagement
"Filters: Practically every modern camera-phone app offers them, from Flickr to Instagram to the iOS built-in camera. You can snap a photo and with a tap make it look reddish, or black and white, or faded and aged. It is now commonplace to capture a photo and edit it on the same device, then instantly share that photo with family, friends, or the world. But despite their present-day ubiquity, filters should not be taken for granted; they affect how people engage with photos in significant ways."
http://blog.flickr.net/2015/05/20/how-photo-filters-affect-online-engagement/