Synthesis of color filter array pattern in digital images

摘要: We propose a method to synthetically create or restore typical color filter array (CFA) pattern in digital images. This can be useful, inter alia, conceal traces of manipulation from forensic techniques that analyze the CFA structure images. For continuous signals, our solution maintains optimal image quality, using quadratic cost function; and it computed efficiently. Our general approach allows derive even more efficient approximate solutions achieve linear complexity number pixels. The effectiveness CFA synthesis as tamper-hiding technique its superior quality is backed with experimental evidence on large sets against state-of-the-art techniques. This exposition confined most relevant 'Bayer'-grid, but generalized other layouts well.