Apparatus and method for producing a monochrome image

摘要

A method to configure an apparatus to apply a plurality of mono colorization filters to a low resolution version of a color image. A contrast value is determined for each application of the mono colorization filters. The mono colorization filter achieving the highest contrast value is applied to a high resolution version of the color image to produce a high contrast monochrome image. The high contrast monochrome image is then printed by the apparatus.

主权项

1. An outputting apparatus for outputting an image, the apparatus comprising:
a color image obtaining unit configured to obtain a color image having multiple colors; a first monochrome image generating unit configured to generate a plurality of monochrome images by applying a plurality of mutually different calculations to the color image; a contrast calculating unit configured to calculate respective contrasts for the plurality of monochrome images; and an outputting unit configured to output a monochrome image derived from the calculated contrasts having the greatest contrast, wherein the contrast calculating unit calculates contrast by calculating a gradation value for each pixel of a monochrome image, and wherein the plurality of mutually different calculations include respectively weighing gradation values of red R, green G, and blue B in the color image with respective weighting coefficients, r, g and b to obtain weighting gradation values and then adding the weighting gradation values.