Seiko Epson Corporation

Hideaki Kasahara

Masashi Kanai

Toru Takahashi

Toru Miyamoto

Akira Sano

Nozomu Hirokubo

Hirokazu Kasahara

Masahi Kanai

Variable wavelength filter including two reflective films facing each other and an actuator group for changing a relative position between the two reflective films is controlled. The actuator group includes a first actuator that is driven according to a target distance between the two reflective films and a second actuator in which a feedback control is performed according to the target distance and a detection value of a distance between the two reflective films. Control method includes (a) receiving a new target distance between the two reflective films, (b) driving the first actuator according to the new target distance, and (c) performing the feedback control on the second actuator according to the new target distance and the detection value of the distance between the two reflective films. When a predetermined condition is satisfied, after start of the (b), and after elapse of a predetermined inhibition time, the (c) is started.

Variable wavelength filter, variable wavelength filter control method, and non-transitory computer-readable storage medium storing computer program

A spectral filter module includes a spectral filter that splits light having a wavelength corresponding to an input drive voltage from incident light and outputs the light, a drive unit that outputs the drive voltage based on an input wavelength command value, and a drive controller that outputs the wavelength command value and changes the wavelength command value every time a trigger signal is input from the outside.

Spectral filter module, spectroscopic camera, and electronic device

A measurement device includes a plurality of light sources configured to emit light toward a measurement object, and having a same emission spectrum, a spectroscopic measurement section configured to perform spectroscopic measurement on the light reflected by the measurement object, a light source switching section configured to switch a combination of the light sources to be put on or off out of the plurality of light sources, and an arithmetic section configured to calculate the spectral reflectivity of the measurement object based on a spectroscopic measurement result obtained by the spectroscopic measurement section when putting on or off the plurality of light sources with a plurality of the combinations.

Measurement device, electronic apparatus and measurement method

A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.

Measurement device, electronic apparatus, and measurement method

A shading correction device includes a reference acquirer that acquires a reference pixel value W in a captured image of a color measurement reference object, a target pixel value acquirer that acquires a pixel value S in a captured image of a measurement target, a bit shift value acquirer that acquires a bit shift value k2 based on the reference pixel value W, a lookup table storing a variable G(=2/W&#x3e;&#x3e;k2) corresponding to W&#x3e;&#x3e;k2, and a calculator that reads the variable Gcorresponding to the reference pixel value W and the bit shift value k2 from the lookup table and calculates a shading correction value Rof each pixel in the captured image of the measurement target using Expression (5): and A, B and k1 are integer constants.

Shading correction device, electronic apparatus, and shading correction method

There is provided a printer including an imaging device that captures an image of a medium, and a control unit that controls an ink discharge amount of a printing unit that discharges ink to form an image. The control unit acquires a captured image of a test pattern which is obtained by an imaging device and is printed by the printing unit, and controls an ink discharge amount on the basis of a grayscale value of a first region including an outer peripheral edge of the test pattern and a grayscale value of a second region within the test pattern.

Printing apparatus and printing control method

The present invention provides an image processing device, a color correction table generation device, a display device, an image processing method, a color correction table generation method, a color adjustment method of a display device, and an image processing program capable of color matching to preferred colors of which excessive emphasis in chroma is suppressed. There are provided a chroma limit setting section for setting a chroma limit based on a optimal color, and a color correction table generation section for generating a color correction table by making a correspondence between an input color and an output color having chroma no greater than a chroma limit. The color correction table is stored in a color correction table storage section. The color correction execution section executes color correction along the color correction table so that the projector outputs a color with chroma no greater than the chroma limit.

Color correction table generation for a display

A printing device includes a first nozzle column in which nozzles discharging liquid to a medium are arranged in a line in a predetermined direction, a second nozzle column in which nozzles discharging liquid to the medium are arranged in the predetermined direction, in which the first and second nozzle columns are arranged in a line in an intersecting direction with respect to the predetermined direction, a control portion which causes the first nozzle column and the second nozzle column to discharge the liquid to the medium while moving the first and second nozzle columns and the medium relatively to each other in a moving direction, in which the control portion forms a certain correction pattern composed of a first pattern formed by the first nozzle column and positioned on one side in the intersecting direction with respect to the moving direction and a second pattern formed by the second nozzle column and positioned on the other side in the intersecting direction with respect to the moving direction in parallel with the first pattern, and the correction pattern forms another correction pattern in which the distance between the second side end of the first pattern and the first side end of the second pattern in the intersecting direction with respect to the moving direction is different from that in the certain correction pattern.

Printing device and printing method

Image processing device, color correction table generation device, display device, image processing method, color correction table generation method, color adjustment method for display device, and image processing program

Growing community of inventors

Matsumoto, Japan

Hideaki Kasahara