Abstract: A measurement pattern having a predetermined shape and L-shaped black areas are superimposed and output to a liquid crystal panel, and a pattern is detected from a taken pattern image. Lines are detected based on an image of a screen frame in the pattern image, and coordinate conversion factors for conversion of camera coordinates in the taken image into panel coordinates are calculated based on panel coordinate values of the pattern and camera coordinate values of the pattern detected from the pattern image. Then, apexes of the screen frame in the panel coordinates are obtained based on the lines and the conversion coordinate factors detected with respect to each corner, correction values are calculated, and trapezoidal distortion correction is performed.

Abstract: A second projector projects and displays a measurement pattern on a projection screen while a first projector projects and displays another measurement pattern on the projection screen. The second projector causes an imaging unit to acquire a captured image including projection images of the two measurement patterns are captured, and detects coordinates of measurement points which are represented in the measurement patterns from the captured image. The second projector corrects the projection target image based on the coordinates such that the projection image by the first projector and its own projection image are in a desired relationship.

Abstract: A projector that acquires evaluation values representing how well projection light is brought into focus on a screen, outputs the acquired evaluation values and a maximum value of the acquired evaluation values, and updates the maximum value to a new value at a predetermined timing.

Abstract: An image processing apparatus includes a projection control section configured to cause a projecting device, which projects an image on a projection surface, to project an image for correction including at least six correction points, a changing section configured to change, according to an instruction of a user, the position of at least one correction point among the at least six correction points projected on the projection surface by the projection control section, and a determining section configured to determine the position of the at least one correction point among the at least six correction points such that, when the image for correction is divided into a first image and a second image by a straight line connecting two correction points among the at least six correction points, the image for correction maintains a continuous shape in a joining portion of the first image and the second image.

Abstract: A projector (100) including a projection section (101) adapted to project an image on a screen (SC), a CPU (120) adapted to make the projection section project a correction pattern (177a) so as to be superimposed on the image presently projected if a start condition of the distortion correction process is satisfied, and a correction control section (122) and a keystone distortion correction section (132) adapted to perform the distortion correction process based on a state of the correction pattern, and the CPU makes the projection section project the correction pattern in a state in which a result of the distortion correction process fails to be reflected during a period from when the start condition of the distortion correction process is satisfied to when a condition for completing the distortion correction process is satisfied, and a period in which the keystone distortion correction section performs the distortion correction process a plurality of times.

Abstract: A projector includes a projecting unit including a projection optical system and configured to project an image on a screen SC, a lens driving unit configured to perform focus adjustment for the projection optical system, a trapezoidal-distortion correcting unit configured to perform distortion correction processing for correcting distortion of the image projected by the projecting unit, and a projection control unit configured to cause the trapezoidal-distortion correcting unit to execute the distortion correction processing until a completion condition for the distortion correction processing holds after a start condition for the distortion correction processing holds and restrict the execution of the focus adjustment by the lens driving unit while the projection control unit causes the trapezoidal-distortion correcting unit to execute the distortion correction processing.

Abstract: A projector includes a projecting unit configured to project an image on a projection surface, a projection control unit configured to cause the projecting unit to project a correction pattern including a first pattern and a second pattern, and a correction control unit configured to detect the first pattern and the second pattern included in the projected correction pattern and correct distortion of the projected image. The correction control unit detects the second pattern projected on a screen and detects the position of the first pattern on the basis of the position of the detected second pattern.

Abstract: An image processing device for a projector including an image formation section that emits light of an image, and a projection system that projects the emitted light onto a projection surface. The image processing device has a distortion correction technique for images displayed on the projection surface. The image processing device has a target display area determination section that determines, in a display area serving as a reference on the projection surface, based on a current value of a parameter, any of target display areas set for values possibly taken by the parameter within an allowable range to be targeted on a distortion-free image for display on the projection surface; a reference formation area determination section that determines a reference formation area to be formed with a virtual distorted image and a correction application section that generates corrected image data for supply to the image formation section.

Abstract: A projector that acquires evaluation values representing how well projection light is brought into focus on a screen, outputs the acquired evaluation values and a maximum value of the acquired evaluation values, and updates the maximum value to a new value at a predetermined timing.

Abstract: A correction information calculating device calculates correction information representing correspondence relationship between a position of a pixel in an image projected onto a projection surface by projectors including an image forming element and a position of a pixel of the image forming element. The correction information calculating device includes a supply unit that supplies first and second measurement image data representing a first and second measurement pattern including a plurality of characteristic diagrams that define characteristic points to a first and second projector that projects an image onto a first and second projection area on the projection surface and a calculation unit that calculates the correction information by comparing positions of the plurality of characteristic points in a photographed pattern acquired by photographing the first and second measurement patterns.

Abstract: A projector includes a projection section that projects a plurality of patterns having lightness values different from each other, an imaging section that captures an image of the plurality of patterns projected by the projection section, and a projection state adjustment section that adjusts, based on any of the plurality of patterns captured by the imaging section, a projection state in which the projection section performs projection.

Abstract: An image processing apparatus includes a projection control section configured to cause a projecting device, which projects an image on a projection surface, to project an image for correction including at least six correction points, a changing section configured to change, according to an instruction of a user, the position of at least one correction point among the at least six correction points projected on the projection surface by the projection control section, and a determining section configured to determine the position of the at least one correction point among the at least six correction points such that, when the image for correction is divided into a first image and a second image by a straight line connecting two correction points among the at least six correction points, the image for correction maintains a continuous shape in a joining portion of the first image and the second image.

Abstract: An image processing device for a projector including an image formation section that emits light of an image, and a projection system that projects the emitted light onto a projection surface. The image processing device has a distortion correction technique for images displayed on the projection surface. The image processing device has a target display area determination section that determines, in a display area serving as a reference on the projection surface, based on a current value of a parameter, any of target display areas set for values possibly taken by the parameter within an allowable range to be targeted on a distortion-free image for display on the projection surface; a reference formation area determination section that determines a reference formation area to be formed with a virtual distorted image and a correction application section that generates corrected image data for supply to the image formation section.

Abstract: In one embodiment, a control method for a projector comprises picking up an image of an area including a screen and an image light and generating a picked-up image; calculating each side of an outer peripheral line of the image light, based on the picked-up image; calculating each side of an outer peripheral line of the screen, based on the picked-up image; and calculating a correction image light modulation area that is an area in a part of a light modulation area so as to fit inside a second imaginary screen outer peripheral line.

Abstract: A projector that acquires evaluation values representing how well projection light is brought into focus on a screen, outputs the acquired evaluation values and a maximum value of the acquired evaluation values, and updates the maximum value to a new value at a predetermined timing.

Abstract: First imaginary screen outer peripheral line is calculated supplementing one side that is undetected with one side of an outer peripheral line of image light that is calculated, an imaginary screen aspect ratio that is an aspect ratio of an area defined by the first imaginary screen outer peripheral line is calculated, whether the imaginary screen aspect ratio is more vertically oriented than a first ratio or not is determined. When a result of the determination of the imaginary aspect ratio is more vertically oriented than the first ratio, the imaginary screen aspect ratio is changed to second ratio that is different from the first ratio, and the one undetected side is calculated according to the second ratio, and the first imaginary screen outer peripheral line is corrected and a second imaginary screen outer peripheral line is calculated.

Abstract: An image processing device for a projector including an image formation section that emits light of an image, and a projection system that projects the emitted light onto a projection surface. The image processing device has a distortion correction technique for images displayed on the projection surface. The image processing device has a target display area determination section that determines, in a display area serving as a reference on the projection surface, based on a current value of a parameter, any of target display areas set for values possibly taken by the parameter within an allowable range to be targeted on a distortion-free image for display on the projection surface; a reference formation area determination section that determines a reference formation area to be formed with a virtual distorted image and a correction application section that generates corrected image data for supply to the image formation section.

Abstract: A correction information calculating device calculates correction information representing correspondence relationship between positions of pixels in an image projected onto projection areas of a projection surface from projectors each including an image forming element and positions of pixels in the image forming element.

Abstract: An image processing system includes: an update unit updating color space information indicating a color space by allowing rotational movement of a selected reference color, taking a line connecting a white color to a black color in the color space as a rotation axis, based on adjustment information indicating that hue of at least one reference color is adjusted, which is in a reference color group including plural reference colors of a RGB system and plural reference colors of a CMY system in the color space; and a correction unit correcting an input image signal based on the color space information.

Abstract: A projection display device adapted to display a projection image based on external image data input externally, includes: a projection section; an image data storage section adapted to store projection image data; an image control section adapted to execute an image data obtaining process; an image capturing section adapted to capture a projection area including the projection surface to generate a captured image; and a correction amount determination section adapted to execute a correction amount determination process for determining a correction amount, wherein the image control section halts the image data obtaining process during a period in which the correction amount determination section is executing the correction amount determination process, and after the correction amount determination process is terminated, makes the projection section display a temporary projection image obtained by correcting an image data previously stored in the image data storage section, and resumes the image data obtaining