Ricoh Company, Ltd.

Tatsuhiko Okada

Daisaku Horikawa

Mamoru Yorimoto

Hiroshi Matsumoto

Yasuyuki Suzuki

Yuichi Sakurada

Masato Kobayashi

Hideaki Suzuki

Nobuyuki Satoh

Makoto Moriwaki

Arata Suzuki

Norikazu Taki

Daisuke Sawada

Tomokazu Kanzawa

Kazushi Takei

Ryo Honda

Jun Yamane

Suguru Yokozawa

Satoshi Iwanami

Masahiro Shigemoto

Atsushi Yamazaki

An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.

Image capturing unit, color measuring device, image forming apparatus, color measuring system and color measurement method for capturing a reference chart and a subject

Image capturing device and color measurement method for capturing a reference chart and a subject

An image forming apparatus includes a recording head in which a plurality of nozzles for discharging liquid droplets; and a pattern forming unit configured to form a test pattern used for positional deviation adjustment including a first pattern serving as a reference pattern and a second pattern serving as an adjustment pattern. The first pattern and the second pattern each are a linear pattern that is parallel to a nozzle arrangement direction and has a disconnected portion. The disconnected portion of the first pattern and the disconnected portion of the second pattern are shifted from each other in the nozzle arrangement direction.

Image forming apparatus with improved visibility for a print test pattern

Image capturing apparatus, color measuring device, image forming apparatus, and color measuring system for capturing a reference chart and a subject

An image forming apparatus includes a recording-head carrier including a recording head for ejecting a liquid droplet onto a recording medium, a relative moving unit configured to relatively move the recording-head carrier and the recording medium; an image recording unit configured to drive the recording head by a driving signal having a driving waveform to eject liquid droplets toward the recording medium while relatively moving the recording-head carrier and the recording medium; a driving-waveform determining unit configured to determine the driving waveform of the driving signal based on a detected temperature near the recording head; a drive-timing determining unit configured to determine drive timing at which the recording head is driven by the driving signal, based on the detected temperature; and a drive control unit configured to set the driving waveform and the drive timing to the image recording unit to drive the recording head.

Image forming apparatus, image forming method, and computer-readable storage medium

Image capturing unit, color measuring device, image forming apparatus, color measuring system and color measurement method capturing a subject outside of the image capturing unit

An image forming apparatus which reads a test pattern formed by ejecting liquid droplets onto a recording medium to adjust an ejection timing of the liquid droplets is disclosed. The image forming apparatus includes an image forming unit; a reading unit; a relative movement unit; an intensity data obtaining unit which obtains intensity data on a reflected light which is received from a scanning position of a light by a light receiving unit while the light moves over the test pattern; and a position detection unit which applies a line position determining operation on the intensity data in the vicinity of a point of inflection included between an upper-limit threshold value and a lower-limit threshold value, and detects a position of a line.

Image forming apparatus, pattern position determining method, and image forming system

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

Image forming apparatus, method for forming test pattern, and computer program product

An image forming apparatus which reads a test pattern formed by ejecting liquid droplets onto a recording medium to adjust an ejection timing of the liquid droplets is disclosed. The image forming apparatus includes a reading unit including a light emitting unit and a light receiving unit; a sensitivity adjusting unit; a relative movement unit; a first correction unit which detects a position of the test pattern; a second correction unit which detects the position of the test pattern; and a correction method selecting unit which selects the first correction unit or the second correction unit based on adjusting results of sensitivity adjusted by the sensitivity adjusting unit.

Image forming apparatus, program, and image forming system

An image capturing device includes a sensor unit that captures a predetermined range including a subject; a reference chart that is captured by the sensor unit together with the subject; an illumination light source that illuminates the subject and the reference chart; a lens member including one or more lenses arranged in an optical path of reflected light extending from the subject and the reference chart to the sensor unit; and a lens moving unit that moves at least one lens of the lens member so as to change a position thereof in a direction along the optical path.

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

An image capturing unit includes a sensor unit that captures a predetermined area including a subject; a reference chart that is arranged in the predetermined area and captured together with the subject by the sensor unit; an optical path length changing member that is arranged on an optical path extending from the subject to the sensor unit and is capable of changing a length of the optical path.

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

An image forming apparatus is disclosed which reads a test pattern formed by ejecting liquid droplets onto a recording medium to adjust an ejection timing of the liquid droplets. The image forming apparatus includes a reading unit; a relative movement unit; a second detected data obtaining unit; a first detected data obtaining unit; a subtraction processing unit which subtracts a value comparable to a local minimum value of first detected data sets from each of the first detected data sets and second detected data sets; and a signal correction unit which calculates a proportion of the subtracted first detected data sets relative to the subtracted second detected data sets to align a local maximum value of the first detected data sets such that it is generally constant.

Method and apparatus for determining pattern position and image forming system including the same

An image forming apparatus which reads a test pattern formed onto a recording medium to adjust an ejection timing of liquid droplets is disclosed. The apparatus includes a reading unit; a pattern data storage unit; an image forming unit; a relative movement unit; an intensity data obtaining unit which obtains intensity data on a reflected light which is received by a light receiving unit from a scanning position of a light while the light moves over the test pattern; and a position detecting unit which applies a line position determining operation on the intensity data and detects a line position.

Method of detecting a pattern position in an image forming apparatus which reads a test pattern formed onto a recording medium to adjust an ejection timing of liquid droplets, image forming apparatus and image forming system

An image capturing unit includes: a sensor unit that captures an image of a predetermined area including an image capture object; a reference chart portion that is disposed in the predetermined area and an image of which is captured together with an image of the image capture object by the sensor unit; an illumination light source that illuminates the image capture object and the reference chart portion; and a specular reflection preventing member that prevents that specular reflection light of light emitted from the illumination light source enters the sensor unit.

Growing community of inventors

Saitama, Japan

Tatsuhiko Okada