Patent ID: 6353486
Filing Date: 2002-03-05
Classification: H04N

Abstract:
An image scanner, comprising:a scanning platform for placing thereon an object to be scanned, marked thereon: a document line for positioning a front edge of said object; a first elongated color block located in front of said document line along a specific direction; and a second elongated color block located in front of said document line along said specific direction and having an interface with said first color block; and an image pickup device passing by said scanning platform from a home position along said specific direction, performing color calibrations of a first and a second colors while passing by said first and said second color blocks, respectively, and performing a scanning operation from a scan start point behind said first and said second color blocks to read image data of said object, and converting said image data of said object into digital data for further processing; wherein each of said first and said second elongated color blocks has a length greater than a length of said image pickup device so that said image pickup device detects colors of said first and said second elongated color blocks as standard colors for color calibrations when said image pickup device passes by said first and said second elongated color blocks.