Image regenerating apparatus having improved character resolution and pattern gradation

An image regenerating apparatus comprising:

• emphasizing unit for filtering an image for emphasis;
• a smoothing unit for filtering an image for smoothing;
• an area determinator for determining a character area and a photograph area in an image and selecting said emphasizing unit for said character area or said smoothing unit for said photograph area;
• an image size changing unit for changing size of an image according to a set image size changing ratio;
• and
• a controller for providing controls so that coefficients for filtering by said emphasizing unit and said smoothing unit are equalized when an image size changing ratio set by said image size changing unit is equal to or larger than a specified magnification ratio.

An image regenerating apparatus comprising:

• a first and a second image processing unit each having both an MTF correction filter for MTF correction of an image and a moire removing filter for removing moire of an image;
• a switching unit for delivering an inputted image, when an image is regenerated with the same size or a compressed size, to an MTF correction filter in said first image processing unit and also to a moire removing filter in said second image processing unit, and, when an image is regenerated with an enlarged size, to either an MTF correction filter or moire removing filter in both said first and second unit;
• a selecting unit for selecting an output from said first or second image processing unit;
• and
• an area determinator for determining a character area and a non-character area in an image, selecting an output from said first image processing unit for an area determined as a character area, and also selecting an output from said second image processing unit for an area determined as a non-character area.