Patent ID: 6665096
Filing Date: 2003-12-16
Classification: H04N

Abstract:
An apparatus for processing an image comprising:an analog-to-digital converter for converting an analog image signal with respect to document data which are detected and input by an image reading sensor of an image inputting device into digital image data by using a control signal input from a controller of said image inputting device, a changed value of a contrast input from the controller at a selected contrast control level, and a changed value of a brightness input from the controller at a selected brightness control level; an upper limited reference voltage setting means for setting the upper limited reference voltage so that the analog-to-digital converter performs a correcting of image distortion and a processing of image; a lower limited reference voltage setting means for setting the lower reference voltage so that the analog-to-digital converter performs a correcting of image distortion and a processing of image; a black correcting memory for storing black correcting data output after the analog-to-digital converter performs an operation of converting the analog image signal into said digital image data; a white correcting memory for storing white correcting data output after the analog-to-digital converter performs an operation of converting the analog image signal into the digital image data; and a maximum value detector for detecting a maximum pixel data value from the digital image data output from the analog-to-digital converter.