Error level analysis shows differing error levels throughout this image, 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 Color Palette Generator (courtesy of MailChimp)

Blog tập hợp những sai lầm khi Photoshop quá tay

Công cụ tạo pattern (từ này dịch thế nào?)