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Error level analysis seeks to prove that whether or not an image has been altered. It takes the image and shows differing error levels throughout it, strongly suggesting some form of digital manipulation. Areas to note are the lips and shirt, as well as the eyes. All are at significantly different error levels than their surroundings. Presumably, colours have been altered and areas brightened.

A range of online resources for popular image manipulation software such as Photoshop and GIMP as well as some other tools.

All search engines are engaged in a constant battle with entities that aim to manipulate search engine results for various reasons. Search Engine Optimization can be a major money earner or a significant distraction depending on what side of the search activity you are on. This infographic explores how Google is attempting to deal with one aspect of SEO, Content Farms.