Ricoh Company, Ltd.

Masahiro Shigemoto

Yasuyuki Suzuki

Hideaki Suzuki

Kazushi Takei

Masato Kobayashi

Nobuyuki Satoh

Satoshi Iwanami

Mamoru Yorimoto

Daisaku Horikawa

Yuichi Sakurada

Suguru Yokozawa

Tatsuhiko Okada

An image capturing device includes an image capturing unit, a moving unit, a detector, and a determiner. The image capturing unit includes an optical transmission member; and a sensor capturing an image of the subject via the optical transmission member. The moving unit moves the image capturing unit in an optical axis direction of the sensor. The detector detects a contamination from first and second images. The first and second images are captured by the sensor when the image capturing unit is located at first and second positions in the optical axis direction, respectively. The second position is spaced away from the subject than the first position in the optical axis direction. The determiner determines that a contamination is deposited on the optical transmission member when a difference in the number of pixels in which a contamination is detected between the first and second images is less than a threshold.

Image capturing device, color measuring device, color measuring system, and image forming apparatus

An image capturing unit includes a sensor section that images a predetermined range including a subject; a reference chart section that is imaged by the sensor section with the subject; and an illumination light source that illuminates the subject and the reference chart section. The illumination light source is arranged at a position where a mirror reflection region that mirror reflects light entering from the illumination light source to the sensor section is outside a region of the subject and the reference chart section.

Image capturing device that images a region including a reference chart and a subject

A color measuring device includes a housing; a sensor unit configured to capture an image of a region, the sensor unit being held to the housing; an illumination light source configured to illuminate the region, the illumination light source being held to the housing; a detecting unit configured to detect a distance between predetermined two points from image data of the region obtained by the sensor unit; a correcting unit configured to correct the image data including a subject whose color is to be measured according to a ratio of the detected distance to a reference distance; and a calculating unit configured to calculate a colorimetric value of the subject based on the corrected image data.

Color measurement system to correct color data corresponding to a ratio of detected distance to a reference distance

Image capturing unit, color measuring device, image forming device, color measuring system, and color measuring method

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Saitama, Japan

Masahiro Shigemoto