公开(公告)号：EP1457054A1

公开(公告)日：2004-09-15

申请号：EP02783916.6

申请日：2002-11-06

申请人： Diasemi Dialog Semiconductor AB

发明人： JOHANSSON, Anders ,  LARSSON, Ingemar

IPC分类号： H04N7/30 ,  G06T9/00

CPC分类号： H04N19/126 ,  H04N19/60

摘要： A method for compressing a digital image composed of a matrix of pixels to provide a compressed digital representation of said image of a predetermined size, the quality of the compressed digital representation being affected by a compression quality factor Q and the method including the fol-lowing steps: for a particular image producing device, developing a mathematical model defining a relationship between the content of the digital image and Q, developing said mathematical model by repeatedly compressing a set of digital test images with varying Q until each test image is compressed to a predetermined size, determining a metric M representing the content of the digital image,applying said metric M in said mathematical model to obtain an image determined quality factor Qmod and compressing the digital image using said quality factor Qmod.