| 摘要 |
In order to the monochromatic conversion of an image, in an image processing apparatus ( 1 a), the color used within the image inputted from an image inputting section ( 2 ) is determined by a color analyzing section ( 3 ), the mixing-ratio of the color components of the image is defined based on the color by a mixing-ratio calculating section ( 4 ), the color components are mixed according to the mixing-ratio by an image converting section ( 5 ) thereby converting the input image to a monochromatic image, and it is outputted from an image outputting section ( 6 ). Further, in order to contract an composite image comprising a character, a line drawing, and a halftone dot, an image processing apparatus ( 21 a) comprises an image inputting section ( 22 ), a character/line drawing region extracting section ( 23 ) for an input image, a pseudo-density region extracting section ( 24 ) for the input image, an image contracting section ( 25 ) for contracting the image using different methods respectively in the pseudo-density region, the character/line drawing region, and the other region, and an image outputting section ( 26 ) for outputting the image. Furthermore, in order to eliminate a ghost image, in an image processing apparatus ( 31 a), front and back images are inputted from an image inputting section ( 32 ), an image reversing section ( 33 a) reverses it, a positional relationship detecting section ( 34 ) detects the positional relationship, an image correcting section ( 35 ) corrects the image as to eliminate a ghost image, an image reversing section ( 33 b) reverses it again, and an image outputting section ( 36 ). Further, in order to align the image position, in an image processing apparatus ( 50 ), the alignment of the images of the consecutive pages from among the images inputted page by page from the image inputting section ( 51 ) is carried out by a page contour detecting section ( 52 ), a page contents region extracting section ( 53 ), an inclination correcting section ( 54 ), and page information processing section ( 57 ), and it is outputted from the image outputting section ( 56 ).
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