Fujifilm Corporation

Fuji Photo Film Company, Limited

Yoshirou Yamazaki

Hirofumi Saita

Provided are a printed matter inspection device and a printed matter inspection method for appropriately determining visibility of a streaky concentration defect, regardless of the size of a variation of pixel values of an image. A printed matter inspection device determines visibility of a streak from a basic streak intensity that is an intensity of the streak detected from a printed matter, color information and frequency feature information on a streak near-field area that is continuous from an area of the streak and has a variation of image feature amounts that is within a predetermined first range, and frequency feature information on an outer peripheral area that is in contact with the streak near-field area, and determines whether the quality of the printed matter is good or not on the basis of at least the visibility.

Printed matter inspection device and printed matter inspection method

Provided are a printing result inspection apparatus, a method, and a program capable of determining a printing defect caused by a printing step and a printing paper defect caused by printing paper by reading the printing paper once. A defect determination unit determines whether defected regions extracted from a non-image region are the printing defect or the printing paper defect based on a density change amount and a color, and an image feature amount of a defected region determined as the printing paper defect in the non-image region is stored in paper defect information and is accumulated in a paper defect information storage unit. Next, the defect determination unit determines whether defected regions extracted from image regions are the printing defect or the printing paper defect based on the paper defect information.

Printing result inspection apparatus and method

Provided are a printing result inspection apparatus, a method, and a program capable of determining a printing defect caused by a printing step and a printing paper defect caused by printing paper by reading the printing paper once. A printing result inspection apparatusaccepts designation of paper defect information used for determining a defected region through an operation unit. A defect determination unitdetermines whether defected regions D, D, and Dextracted from a non-image region Aare the printing defect or the printing paper defect based on designated paper defect information, a density change amount, and a color, and an image feature amount of a defected region determined as the printing paper defect in the non-image region Ais stored in paper defect information Iand is accumulated in a paper defect information storage unit. The defect determination unitperforms the determination of defected regions Dand Dextracted from image regions Aand Abased on the designated paper defect information, stored paper defect information relating to printing paper Pbeing inspected, and the paper defect information I

An image defect detection device that divides an original print image and a print image printed on the basis of the original print image into corresponding regions, acquires an image feature amount of each divided region, extracts a strength of a difference of each divided region between the original print image and the print image, calculates an image defect detection time indicating a time required to detect a defect of each divided region of the print image from the image feature amount and the strength of the difference of each divided region, calculates an expected image defect value indicating a possibility of presence of a defect in each divided region of the print image from the image feature amount and the strength of the difference of each divided region, determines an order of detection of the image defect of the divided region of the print image.

Image recording device, image defect detection device, and image defect detection method

This object is solved by a device for inspecting a print material, including evaluation value acquisition means for inspecting a plurality of print materials and acquiring an evaluation value indicating quality of each print material, allowed-number-of-failed-product acquisition means for acquiring an allowed number of failed products among the plurality of print materials, determination criterion determination means for determining a determination criterion in which the number of failed products is equal to or smaller than the allowed number of failed products and a sum of evaluation values of passed products becomes a highest-quality value, pass and fail determination means for determining pass or fail of each print material on the basis of the determination criterion and the evaluation value of each print material, and output means for outputting a determination result of the pass and fail determination means.

Device for inspecting print material, method of inspecting print material, and program

There is provided a platemaking method of forming relief based on relief pattern data in a printing plate to be pressed on a printing matter, and the platemaking method includes the steps of: estimating distribution of printing pressure of the printing plate pressed on the printing matter on the basis of image data; calculating an amount of correction of engraving shape data on the basis of the distribution of printing pressure; correcting the engraving shape data on the basis of the amount of correction; and acquiring exposure amount data from the engraving shape data corrected. By exposure (engraving) processing based on the exposure amount data that can be acquired in this way, it is possible to form relief in consideration of deformation of a printing plate in accordance with the distribution of printing pressure in the printing plate to favorably print and reproduce an image on a printing medium.

Platemaking method, platemaking device, printing press, and printing plate

There is provided a platemaking method of forming relief based on relief pattern data in a printing plate to be pressed on a printing matter, and the platemaking method includes steps of: estimating distribution of printing pressure of the printing plate pressed on the printing matter on the basis of image data and distribution data of plate thickness; calculating an amount of correction of engraving shape data on the basis of the distribution of printing pressure; correcting the engraving shape data on the basis of the amount of correction; and acquiring exposure amount data from the engraving shape data corrected. It is possible to form relief in consideration of deformation of a printing plate in accordance with the distribution of printing pressure in the printing plate to favorably print and reproduce an image on a printing medium.

Platemaking method, platemaking device, and printing press

There is provided a platemaking method of forming relief based on relief pattern data in a printing plate to be pressed on a printing medium, and the platemaking method includes the steps of: acquiring setting printing pressure; estimating distribution of printing pressure on the basis of image data; calculating an amount of correction of the relief pattern data on the basis of the distribution of printing pressure and setting printing pressure; correcting the relief pattern data on the basis of the amount of correction, and acquiring exposure amount data from engraving shape data corrected. It is possible to form relief in consideration of deformation of a printing plate in accordance with the distribution of printing pressure and the setting printing pressure in the printing plate to favorably print and reproduce an image on a printing medium.

On a printing relief plate, which is produced by a printing relief plate producing apparatus and a printing relief plate producing method, convexities and detecting portions are set to be lower than a solid area of the printing relief plate. In the event that a detecting portion image and a solid area image are printed on a print medium using the printing relief plate by a printing apparatus and by carrying out a printing method, in a printing pressure determining apparatus and a printing pressure determining method, it is determined whether a printing pressure is an appropriate printing pressure or not by comparing an optical density of the detecting portion image and an optical density of the solid area image.

Printing relief plate, printing relief plate producing apparatus, printing apparatus, printing pressure determining apparatus, and methods therefor

A dot position measurement method and a dot position measurement apparatus provide a plurality of common line blocks and averaging measurement values of positions of lines in each common line blocks when correcting the measurement positions in each line block by taking a common line block (reference line block) as a reference position, and it is possible to reduce effects of random positional variation in a main scanning direction of an image reading apparatus.

Dot position measurement method and dot position measurement apparatus

A defective recording element detecting apparatus includes: a read image data acquiring device which acquires read image data of a test pattern recorded on a recording medium by a recording head having recording elements; a reference area setting device which sets a reference area including a part of the test pattern on a read image representing image contents of the read image data; a comparison area setting device which sets a comparison area on the read image; a correlation operation device which performs a correlation operation between the comparison area and the reference area; a distortion correction value determining device which determines a distortion correction value, from a result of the correlation operation; an image distortion correcting device which corrects image distortion of the read image using the distortion correction value; and a defective recording element determining device which identifies a defective recording element according to the corrected read image.

Defective recording element detecting apparatus and method, and image forming apparatus and method

A defective recording element detecting apparatus includes: an image signal acquiring device which acquires read image signals obtained by reading, a linear test pattern recorded by an image recording apparatus having: a recording head and a medium conveying device which causes relative movement between a recording medium and the recording head in a signal decomposing device which sequentially assigns reading pixel numbers 0 to n to the acquired read image signals, divides the reading pixel numbers by an analysis pitch unit PS to obtain remainders, and decomposes the read image signals into an image signal of each of the obtained remainders; a fluctuation signal calculating device which calculates a fluctuation signal of each of the remainders; and an identifying device which identifies a defective recording element among the plurality of recording elements based on the fluctuation signal of each of the remainders.

Defective recording element detecting apparatus, defective recording element detecting method, and image forming apparatus

A recording position error measurement apparatus includes a read image signal acquisition device and a signal processing device having: a dividing device which divides pixel series of the read image signal into sequences having different remainder values so as to generate image signals of the respective sequences; a prediction signal generation device which calculates regular prediction signals which are predicted with respect to the respective sequences, according to the read image signal; a threshold value determination device which determines tone value differences corresponding to respective distances representing recording position errors from the prediction signals, and which determines threshold values corresponding respectively to the recording position errors, from the tone value differences; a change signal calculation device which calculates a change signal indicating a difference between the prediction signal and the image signal of each of the sequences; and an error distance calculation device which specifies the recording position errors of the plurality of recording elements in the recording head according to comparing the change signal with each of the threshold values.

Recording position error measurement apparatus and method, image forming apparatus and method, and computer-readable medium

According to an aspect of the present invention, the function expressing the relationship between the temporary recording element number and the line positions for each line block is obtained, and adequacy of the temporary recording element number is determined based on consistency between the line blocks having the characteristics expressed by the functions. For the line blocks that have different characteristics from the rest of the line blocks, it is determined that the temporary recording element numbers of such line blocks have errors, and these temporary recording element numbers are corrected. Thus, the correspondence relation between each recording element number and each line position can be defined so that the characteristics of the line blocks become consistent with one another.

Dot position measurement method and apparatus, and computer readable medium

According to an aspect of the present invention, by correcting the measurement positions of each line block with a reference line block serving as a reference point, the effect of disruption of the read image lattice caused by the image reading apparatus can be diminished, whereby the effect of paper deformation can be reduced, making highly accurate dot position measurement possible.

Growing community of inventors

Kanagawa, Japan

Yoshirou Yamazaki