Method and device for calculating blur in video images

A method for calculating blur of video images, comprising steps of

• calculating a horizontal blur value;
• determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level;
• if the video images are progressive, calculating also a vertical blur value and combining it with the horizontal blur value;
• and
• normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.

An apparatus for calculating blur of video images,

• calculator means for calculating a horizontal blur value;
• detector means for determining characteristic parameters of the video images, including at least progressive/interlaced and spatial resolution level;
• calculator means for calculating also a vertical blur value and combining it with the horizontal blur value if the video images are progressive;
• and
• normalize means for normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.