Process and apparatus for reducing picture with fine line disappearance prevention

Abstract From the Canadian patent

A process for reducing a picture by determining monochrome data of converted picture pixels according to logical calculations based on monochrome data of original picture pixels by using divisional regions o a picture area according to a reduction rate for avoiding, disappearance of fine lines from the converted picture. The process includes the steps of: successively receiving monochrome data of original picture pixels in the vicinity of a converted picture pixel; producing data of a line susceptible to disappearance such data, being necessary for detecting pixels along a line in the converted picture which could disappear from the converted picture due to picture conversion; …