Dainippon Screen Mfg. Co., Ltd.

Screen Holdings Co., Ltd.

Toshio Manki

Kiyoshi Imai

Koji Matsuo

Kazuo Isoguchi

Kenta Nagai

Sho Tomioka

Hiroyuki Shibata

Tetsuyuki Kitayama

Yasufumi Kataoka

An editing device generates a first public key and a first private key, receives a manuscript data encrypted using the first public key from an ordering device, and decrypts the encrypted manuscript data using the first private key. The editing device generates, based on the manuscript data, print data encrypted using a second public key generated in a RIP processing device, and deletes the first private key after finishing execution of a job. Using a third public key, the editing device encrypts a log which shows an execution process of the job, the log including information that a finish processing has been executed. The editing device may store the first private key before starting execution of the job, and may control whether the job is to be executed, based on a job ID received from the ordering device.

Job execution method and job execution device

A print data processing apparatusincludes a page data creating apparatusand a rasterization processing apparatus. The page data creating apparatusincludes, as functional elements thereof, a common object defining unit, an allocating condition setting unit, a correction information embedding unit, and a page data generating unit. The rasterization processing apparatusincludes, as functional elements thereof, an analyzing unithaving a correction information searching unitand a resolution acquiring unit, a correcting unit, and a raster data generating unit

Optimizing a line width of bar codes printed by variable printing

The trapping process described below reliably creates trapping images where needed even when there are small gaps between two adjacent image objects that are parts in the printed output. When a focus object and a related object that is below and adjoins the focus object touch at two points A, B so that a gap region Rg is formed between the focus object and related object, the adjoining vectors identifying where a trapping image must be created are extracted as follows. First, the vector of intersection that is equivalent to the path from point A to point B along the part of the contour of the focus object touching the gap region is determined. Next, the distance L from the midpoint C of this vector of intersection to the related object is calculated, and whether this distance L is less than or equal to specified value e (representing a gap equivalent to one or two pixels) is determined. If distance L is less than or equal to specified value e, that vector of intersection is saved as an adjoining vector.

Image processing for trapping in color printing

Growing community of inventors

Kyoto, Japan

Toshio Manki