Abstract: An image forming apparatus using an exposure unit of a solid-scanning type such as an LED head, reads out linear distortion correction data of an LED unit, then, calculates an amount of correcting color deviation based on the read-out data, and after that, carries out address control for color deviation correction memory. Based on this control, the apparatus creates a reference resist patterns, calculates an amount of correcting the color deviation, and writes the calculated amount in the color deviation correction memory. After that, the apparatus reads out the linear distortion correction data, and adds the amount of correcting the color deviation that is determined by sensors, and the amount of the color correction based on the linear distortion correction data, thereby carries out address controls for the color deviation correction memory.

Abstract: The present invention relates to an image processor provided in apparatuses such as digital copiers and printers, and that distinguishes between a character edge region and a continuous tone region of an original image and switches the tone reproduction processing between the regions.

Abstract: There is provided an image processing apparatus and an image processing method capable of conducting different manners of resolution conversion processing depending on scanning direction. An image processing apparatus 1 includes: a sub-scanning-directional first resolution converting section 4 for enhancing resolution of input image data in a sub-scanning direction; a sub-scanning-directional second resolution converting section 5; a main-scanning-directional first resolution converting section 14 for enhancing resolution of input image data in a main-scanning direction; and a main-scanning-directional second resolution converting section 15. The structure such as above enables the image processing apparatus 1 to conduct resolution conversion processing in sub-scanning direction and main-scanning direction independently, thereby to obtain a high-quality output image.

Abstract: There is provided an image processing apparatus and an image processing method capable of conducting different manners of resolution conversion processing depending on scanning direction. An image processing apparatus 1 includes: a sub-scanning-directional first resolution converting section 4 for enhancing resolution of input image data in a sub-scanning direction; a sub-scanning-directional second resolution converting section 5; a main-scanning-directional first resolution converting section 14 for enhancing resolution of input image data in a main-scanning direction; and a main-scanning-directional second resolution converting section 15. The structure such as above enables the image processing apparatus 1 to conduct resolution conversion processing in sub-scanning direction and main-scanning direction independently, thereby to obtain a high-quality output image.

Abstract: The present invention relates to an image processor provided in apparatuses such as digital copiers and printers, and that distinguishes between a character edge region and a continuous tone region of an original image and switches the tone reproduction processing between the regions.

Abstract: An image forming apparatus using an exposure unit of a solid-scanning type such as an LED head, reads out linear distortion correction data of an LED unit, then, calculates an amount of correcting color deviation based on the read-out data, and after that, carries out address control for color deviation correction memory. Based on this control, the apparatus creates a reference resist patterns, calculates an amount of correcting the color deviation, and writes the calculated amount in the color deviation correction memory. After that, the apparatus reads out the linear distortion correction data, and adds the amount of correcting the color deviation that is determined by sensors, and the amount of the color correction based on the linear distortion correction data, thereby carries out address controls for the color deviation correction memory.

Abstract: A drilling tool which comprises: a cylindrical structure having a spiral groove provided on the outer surface thereof and at least one elongated rectangular through-hole provided in the lower portion thereof; a tip which is loosely fitted into said through-hole in such a manner that a cutting edge of said tip faces outside, the number of said tips being equal to the number of said through-holes; a tip guide bar having a head portion and a taper slit which is tapered downwardly starting from a part of the lower surface of said head portion so as to accommodate said tip therein, said part being in the vicinity of the axial line thereof, said tip guide bar being inserted into the lower end portion of said cylindrical structure in such a manner that said tip is pushed outwardly by the tip guide bar, said tip guide bar being engaged with the upper and inner portion of said tip so that said tip guide bar is slidably connected to said cylindrical structure; and a taper shank inserted into the upper end portion of sa