Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Makoto Hamatsu

Tomohisa Suzuki

Kenjo Nagata

Toru Iwanami

Wenxiang Ge

Hidefumi Tanaka

Matsuyuki Aoki

Shoji Yamauchi

Takashi Sato

Kenta Ogata

Yoshiki Matsuzaki

Shun Yashima

Gen Nakajima

Hiroaki Kumai

An image forming apparatus includes a detection unit that optically detects a density of a reference toner image for density measurement formed on an image carrier. Either a first detection method for detecting the density of the reference toner image by receiving specularly reflected light reflected by the image carrier and the reference toner image for density measurement formed on the image carrier or a second detection method for detecting the density of the reference toner image by receiving diffusely reflected light from the image carrier and the reference toner image, is selected in accordance with color information of a toner, the color information being stored beforehand in a storage unit, and the density of the reference toner image is optically detected.

Image forming apparatus including a detection unit configured to detect a density of a reference toner image

An image forming apparatus includes an image forming section, a post-processing unit, and a controller. The image forming section forms an image on a recording medium. The post-processing unit processes the recording medium obtained after the image forming section forms the image. The controller controls a post-processing execution time of the post-processing unit on the basis of information obtained by reading at least one control pattern from the recording medium. The at least one control pattern is formed to control the image forming section.

Image forming apparatus and non-transitory computer readable medium

An image forming apparatus includes a density adjusting unit that executes first formation of forming a first color sample in a transfer area on an image carrier, first adjustment of adjusting output characteristics of an image forming unit to reduce a difference between a measured density of the first color sample and a first target density, second formation of forming a second color sample in a non-transfer area on the image carrier, second adjustment of adjusting the output characteristics to reduce a difference between a measured density of the second color sample and a second target density, and third adjustment of adjusting the output characteristics to reduce a difference in output density between the transfer and non-transfer areas, if the difference between the measured density of the second color sample and the second target density exceeds a predetermined extent after repeating the second formation and the second adjustment.

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

Provided is an image detection device including a light-emitting unit that emits light toward an image holding member, a first light-receiving unit that is disposed at a position where specular reflected light of the light emitted toward the image holding member is received, a second light-receiving unit that is disposed at a position where diffuse reflected light of the light emitted toward the image holding member is received, a light-emission control unit that controls an intensity of the light emitted by the light-emitting unit, and a reference member that is disposed at a position through which light having an intensity that is less than an intensity detectable by the second light-receiving unit passes in a case of the first intensity and through which light having an intensity that is equal to or higher than the intensity detectable by the second light-receiving unit passes in a case of the second intensity.

Image detection device, and image forming apparatus

A density detection apparatus includes the following elements. An image forming unit forms density detection images having different area ratios. A measuring unit measures an amount of reflected light. A storage unit stores reference values and also stores a representative value thereof. A determining unit determines a threshold for the area ratios of the density detection images on the basis of a variation among the reference values. A density obtaining unit obtains, for a density detection image having an area ratio which exceeds the threshold, a density level by using the amount of light reflected by the density detection image and the representative value, and obtains, for a density detection image having an area ratio which is equal to or smaller than the threshold, a density level by using the amount of light reflected by the density detection image, the associated reference value, and the representative value.

Density detection apparatus and method and image forming apparatus

An image forming apparatus includes a controller that provides control in which, if image formation processing by a single unit is executed first since a density adjustment condition for adjusting a density of an image is satisfied, a density adjustment value is changed by a predetermined basic change amount, and a first image is formed in a corresponding image formed region with a density that is adjusted in accordance with the changed density adjustment value, and control in which, if a single image other than the first image is formed in the corresponding image formed region, the current density adjustment value is changed by a predetermined fine change amount that is smaller than the basic change amount, and the single image is formed in the corresponding image formed region with a density that is adjusted in accordance with the changed density adjustment value.

Image forming apparatus, image forming method, and recording medium

A density detection apparatus includes the following elements. A storage unit stores therein image information. A measuring unit measures amounts of light components reflected by an image carrier or density detection images represented by the image information. A light amount obtaining unit obtains a variation in amounts of light components reflected by each region in which the associated density detection image is formed, and obtains, as a reference value, a representative value of the amounts of light components. An image correcting unit corrects the image information by changing an arrangement order of the density detection images. An image forming unit forms the density detection images on the image carrier on the basis of the corrected image information. A density obtaining unit obtains density levels of density detection images corresponding to their area ratios by using the amounts of light components reflected by the density detection images and the reference values.

An image-forming apparatus includes: a memory that stores a plurality of image forming modes; a contact controller that controls a status of contact between a plurality of image-forming units and an intermediate transfer member on the basis of an image forming mode selected from among the plurality of image forming modes, so that an image-forming unit used for image forming represented in the selected image forming mode is contacted with the intermediate transfer member, and another image-forming unit is moved away from the intermediate transfer member; and an image-quality adjusting unit that adjusts, if the status of contact is changed by the contact controller, an image quality of an image that is to be transferred onto the intermediate transfer member from the image-forming unit that is in contact with the intermediate transfer member.

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Kanagawa, Japan

Makoto Hamatsu