Konica Minolta, Inc.

Natsuko Kawai

Tetsuya Ishikawa

Tomohiro Kawasaki

Tatsuya Furuta

Shota Sakurai

Kazuhiro Saito

Hiroshi Morimoto

Hiroki Shibata

Wataru Watanabe

Kei Okamura

Ryoei Ikari

Keiki Katsumata

Takashi Akazawa

Keiji Uchikawa

A system for predicting occurrence of a defective image includes an observation distance obtainer which obtains an observation distance of an image to be formed by an image forming apparatus. The system (i) divides image data input to the image forming apparatus as an original of the image into regions of interest having a size determined based on the observation distance, (ii) analyzes a spatial frequency of a gradient distribution of the image with respect to each of the regions of interest, and (iii) calculates a probability of a target density irregularity being conspicuous in the image to be formed by the image forming apparatus based on the image data by using a correlation index between a result of the analysis and an evaluation value of the density irregularity.

System for predicting occurrence of defective image and non-transitory computer readable medium

An image forming apparatus includes a development current detector that detects an actual measurement value of a development current, a development current calculator that calculates a provisional calculation value of a development current based on an image formation condition, and an image-defect determiner that determines whether or not an image defect occurs, based on the actual measurement value of the development current detected by the development current detector and the provisional calculation value of the development current calculated by the development current calculator.

Image forming apparatus and a recording medium for determining image defects based on development current

A system for predicting occurrence of a defective image includes: an input device configured to input image data into an image forming apparatus; and a hardware processor configured to analyze a spatial frequency of gradient distribution of an image in accordance with a size of a density irregularity specific to the image forming apparatus with respect to the input image data and to calculate a probability of a conspicuous density irregularity of the size in regard to the image formed by the image forming apparatus based on the image data with reference to an index of correlation between an analysis result and an evaluation value of the density irregularity.

System for predicting occurrence of defective image and program for predicting occurrence of defective image

An image forming apparatus includes: an image forming section configured to form a toner image on a sheet having a paste component; and an end pressing section provided on an upstream side of the image forming section in a sheet conveyance direction, and configured to exert a pressure on an end portion of the sheet while moving from a center toward an end of the sheet in a sheet width direction orthogonal to the sheet conveyance direction.

Image forming apparatus and image formation system

An image forming apparatus includes a second cleaning section, an image formation control section configured to control an image forming section to form a high-coverage patch on a transfer belt, and a cleaning control section configured to control the second cleaning section to perform cleaning of the patch on the transfer belt.

Image forming apparatus, image formation system and recording medium

A transfer-section contamination prevention device includes: a powder housing section that is disposed on an upstream side relative to a transfer section in a sheet conveyance direction, and is capable of holding powder at a position near an end portion of a sheet in a sheet width direction orthogonal to the sheet conveyance direction or capable of guiding the powder to the position near the end portion of the sheet, the sheet including a base material layer, a release layer and an adhesive layer containing adhesive agent disposed between the base material layer and the release layer, the transfer section being configured to transfer a toner image to the sheet; and a powder adhesion facilitation section configured to facilitate adhesion of the powder to the lateral end portion of the sheet from the powder housing section.

Growing community of inventors

Tokyo, Japan

Natsuko Kawai