Abstract: An image forming system includes an image forming apparatus, an information processing apparatus and a printer driver generator that generates a printer driver and a unique authentication key for the printer driver. The information processing apparatus gives the unique authentication key to a job generated according to the printer driver currently installed thereon, and transmits them to the image forming apparatus. And the image forming apparatus executes the job if the authentication key received therefrom and an authentication key recorded in the image forming apparatus are identical.

Abstract: A most used color that is a most popularly used color is obtained in an image. Pixel groups formed of continued pixels having an identical color other than the most used color in the image is extracted as first pixel groups. Pixel groups having a color of which a color difference with respect to the most used color is smaller than a predetermined threshold and having a size thereof that is smaller than a predetermined size is extracted as third pixel groups among the first pixel groups thus extracted. The first pixel groups other than the third pixel groups are taken as second pixel groups. An image is generated by replacing colors of portions, which correspond to the second pixel groups in an image having an area identical with that of an image to be processed and filled with the most used color, with the corresponding second pixel groups, respectively.

Abstract: A method for deciding correctly a type of a specific area of an image having inclination includes the steps of generating an edge image based on a target image to be a target of image processing, generating a first histogram indicating the number of edge pixels existing in the lateral direction at each position in the longitudinal direction within a predetermined area and a second histogram indicating the number of the edge pixels existing in the longitudinal direction at each position in the lateral direction with respect to the edge pixels that indicate an edge in the predetermined area of the edge image, determining a variance value of a width of a mountain having an extreme value that exceeds a predetermined threshold value in the histograms, and deciding whether or not the predetermined area is one of a table area and a graph area based on the variance value.

Abstract: An image forming system includes an image forming apparatus, an information processing apparatus and a printer driver generator that generates a printer driver and a unique authentication key for the printer driver. The information processing apparatus gives the unique authentication key to a job generated according to the printer driver currently installed thereon, and transmits them to the image forming apparatus. And the image forming apparatus executes the job if the authentication key received therefrom and an authentication key recorded in the image forming apparatus are identical.

Abstract: An image processing apparatus scans image data along a row in an x direction, and if a series of black pixels having a length equal to or more than a first threshold is detected, the series of black pixels is determined as a rule and erased. Furthermore, if a series of black pixels having a length equal to or more than a second threshold that is connected to the rule and extends in a y direction is detected, the series of black pixels is determined as a rule and erased.

Abstract: A most used color that is a most popularly used color is obtained in an image. Pixel groups formed of continued pixels having an identical color other than the most used color in the image is extracted as first pixel groups. Pixel groups having a color of which a color difference with respect to the most used color is smaller than a predetermined threshold and having a size thereof that is smaller than a predetermined size is extracted as third pixel groups among the first pixel groups thus extracted. The first pixel groups other than the third pixel groups are taken as second pixel groups. An image is generated by replacing colors of portions, which correspond to the second pixel groups in an image having an area identical with that of an image to be processed and filled with the most used color, with the corresponding second pixel groups, respectively.

Abstract: A method for deciding correctly a type of a specific area of an image having inclination includes the steps of generating an edge image based on a target image to be a target of image processing, generating a first histogram indicating the number of edge pixels existing in the lateral direction at each position in the longitudinal direction within a predetermined area and a second histogram indicating the number of the edge pixels existing in the longitudinal direction at each position in the lateral direction with respect to the edge pixels that indicate an edge in the predetermined area of the edge image, determining a variance value of a width of a mountain having an extreme value that exceeds a predetermined threshold value in the histograms, and deciding whether or not the predetermined area is one of a table area and a graph area based on the variance value.

Abstract: An image processing apparatus scans image data along a row in an x direction, and if a series of black pixels having a length equal to or more than a first threshold is detected, the series of black pixels is determined as a rule and erased. Furthermore, if a series of black pixels having a length equal to or more than a second threshold that is connected to the rule and extends in a y direction is detected, the series of black pixels is determined as a rule and erased.