Fuji Xerox Co., Ltd.

Shuichi Sugimoto

Kenji Mori

Nobukazu Takahashi

Jun Koyatsu

Shinsuke Sugi

Masaomi Sakamoto

Tomoshi Hara

An image forming apparatus includes a forming unit, a detecting unit, and a creating unit. The forming unit forms a first image and at least one of second and third images on a recording medium. The first image is used to create correction data for gradation correction. The second image is used to detect a streak in a cross direction which is produced in the first image. The cross direction intersects a conveying direction in which the recording medium is conveyed. The third image is used to detect the streak in the conveying direction which is produced in the first image. The detecting unit detects the streak by using at least one of the second and third images. When the detecting unit detects the streak, the creating unit creates the correction data on the basis of a portion other than a region corresponding to the streak in the first image.

Image forming apparatus, image forming method, and non-transitory computer readable medium

A determination device includes an acquisition unit that acquires an output characteristic representing a relationship between a gradation value corrected by a correction unit in accordance with a predetermined correction characteristic and a measured value of a density of a toner image output by an output device for the gradation value; an estimation unit that estimates a density of a toner image output by the output device for a predetermined reference gradation value when the reference gradation value is not within a range of the corrected gradation value, the estimation being performed based on the output characteristic acquired by the acquisition unit; and a determination unit that determines whether or not the correction characteristic needs to be changed by comparing the density estimated by the estimation unit with a predetermined threshold.

Determination device, correction device, output device, and determination method

An image quality control and adjustment apparatus includes a management unit and a controller. The management unit manages operation specification information. The controller performs, in a case where an operation that conforms to the operation specification information is performed, an image quality adjustment for an image forming apparatus using a result obtained from the operation, and does not perform, in a case where an operation that does not conform to the operation specification information is performed, an image quality adjustment for the image forming apparatus using a result obtained from the operation.

Determining when refrain from performing image quality adjustment by an image quality control and adjustment apparatus, an image quality control and adjustment method, and a non-transitory computer readable medium

An image forming apparatus includes a measuring unit, an adjustment image forming unit, a density value calculating unit, and a transfer parameter determining unit. The measuring unit measures colors of an image formed on a recording medium. The adjustment image forming unit forms an adjustment image including a combination color which is produced by superimposing colorants of two or more component colors. The density value calculating unit calculates, in accordance with a measurement result obtained by measuring the combination color included in the adjustment image by the measuring unit, a density value of a component color of a colorant that is formed in an uppermost layer on the recording medium among the two or more component colors. The transfer parameter determining unit determines a value of a transfer parameter in accordance with the calculated density value, the transfer parameter defining an operation condition used for performing transfer.

Image forming apparatus determining transfer parameter using color measurement result, image forming method, and non-transitory computer readable medium

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Kanagawa, Japan

Shuichi Sugimoto