Patent ID: 8605346

Claim:
An image processing apparatus for scanning an image printed on a medium and performing image processing, the image processing apparatus comprising: a scanner unit comprising: a scanner head with a scanning width at least covering a width in a first direction of the medium, and the scanner head comprising three scanning channels of red, green, and blue for generating image data represented by RGB luminance components; and a moving unit configured to move the scanner head in a second direction perpendicular to the first direction; a central processing unit configured to control the scanner head and the moving unit to perform a scanning operation such that the moving unit moves the scanner head at a first speed and the scanner head scans the image using the three scanning channels; and an image processing unit configured to determine type of an area of contiguous space of a predetermined minimal size scanned by the scanner head; wherein the central processing unit is further configured to: control the scanner head and the moving unit to perform the scanning operation such that the moving unit moves the scanner head at a second speed higher than the first speed and the scanner head scans the image using the single channel of green, when the area is a blank area based on a determination result of the image processing unit, control the scanner head and the moving unit to perform the scanning operation such that the moving unit moves the scanner head at the first speed and the scanner head scans the image using the single channel of green, when the area is a black text area based on the determination result of the image processing unit, and control the scanner head and the moving unit to perform the scanning operation such that the moving unit moves the scanner head at the first speed and the scanner head scans the image using the three channels, when the area is a graphic area based on the determination result of the image processing unit.