Image projection system, projector, and control method for image projection system

Abstract

A target color is set on the basis of a first captured image obtained by capturing, with an imaging section, at least apart of a first image projected by a projection optical system of a projector. First correction data for correcting a color of a projected image of another projector to the target color is calculated on the basis of a second captured image obtained by capturing, with the imaging section, at least a part of a second image projected by the projection optical system of the other projector.

What is claimed is: 
     
         1 . An image projection system comprising:
 a first projecting section configured to project a first image;   a first imaging section configured to capture a range including at least a part of the first image projected by the first projecting section and at least a part of a second image;   a second projecting section configured to project the second image; and   a second imaging section configured to capture a range including at least a part of the first image projected by the first projecting section and at least apart of the second image projected by the second projection section, wherein   the image projection system calculates first correction data for correcting a color of a projected image of the first projecting section to a target color on the basis of a first captured image obtained by capturing, with the first imaging section, at least a part of the first image projected by the first projecting section and calculates, on the basis of a second captured image obtained by capturing, with the second imaging section, at least a part of the second image projected by the second projecting section, and a third captured image obtained by capturing, with the second imaging section, at least a part of the first image projected by the first projecting section, the first correction data for correcting a color of a projected image of the second projecting section to the target color, wherein:   the second correction data is data for correcting a color of a first point in the second captured image to the target color, the second correction data being a first value, the first value being a difference between the target color and an imaging value of the first point in the second captured image,   the second projector includes a second imaging section configured to capture a third captured image, the third captured image being obtained by capturing at least a part of the second image projected by the second projecting section, and   the image projection system calculates, on the basis of the third captured image and second correction data for correcting a color of a second point to the target color by adding the first value and a second value that is a difference between an imaging value of the first point in the third captured image and an imaging value of the second point in the third captured image.   
     
     
         2 . The image projection system according to  claim 1 , wherein the image projection system sets an imaging value of a first position on the first captured image as the target color and calculates the first correction data for correcting the projected image in the second projector such that an imaging value of a second position on the second captured image is corrected to the imaging value of the first position. 
     
     
         3 . The image projection system according to  claim 1 , wherein the image projection system corrects a color of the projected image based upon lattice points, the image projection system generating a correspondence table in which specified coordinates of the lattice points in data of the first captured image and coordinates of stored lattice points in pattern image data are registered in association with each other. 
     
     
         4 . The image projection system according to  claim 1 , comprising:
 a first projector that includes the first projection section and the first imaging section; and   a second projector that includes the second projection section and the second imaging section.   
     
     
         5 . The image projection system according to  claim 4 , wherein the first projector includes:
 a first calculating section configured to set an imaging value of a first position on the first captured image as the target color and calculate the first correction data for correcting the projected image such that an imaging value of a second position on the second captured image is corrected to the imaging value of the first position; and   a transmitting section configured to transmit the first correction data calculated by the first calculating section to the second projector.   
     
     
         6 . The image projection system according to  claim 4 , wherein the first projector includes a second calculating section configured to calculate, on the basis of the third captured image received from the second projector, the second correction data for correcting the colors of the plurality of places in the second image to the color of the predetermined point. 
     
     
         7 . The image projection system according to  claim 4 , wherein
 the first projector includes:
 a first calculating section configured to set an imaging value of a first position on the first captured image as the target color and calculate the first correction data for correcting the second image in the second projector such that an imaging value of a second position on the second captured image is corrected to the imaging value of the first position; and 
 a transmitting section configured to transmit the first correction data calculated by the first calculating section to the second projector, and 
   the second projector calculates, on the basis of the first correction data received from the first projector, the second correction data for correcting colors of a plurality of places in the second image to the color of the predetermined point.   
     
     
         8 . An image projection system comprising:
 a first projecting section configured to project a first image;   a first imaging section configured to capture a range including at least a part of the first image projected by the first projecting section and at least a part of a second image;   a second projecting section configured to project the second image; and   a second imaging section configured to capture a range including at least a part of the first image projected by the first projecting section and at least apart of the second image projected by the second projection section, wherein the image projection system sets a target color on the basis of a first captured image obtained by capturing, with the first imaging section, at least a part of the first image projected by the first projecting section and calculates correction data for correcting a color of a projected image of the second projecting section to the target color, and on the basis of a second captured image obtained by capturing, with the second imaging section, at least a part of the second image projected by the second projecting section, a third captured image obtained by capturing, with the second imaging section, at least a part of the first image projected by the first projecting section.   
     
     
         9 . The image projection system according to  claim 8 , wherein the image projection system corrects a color of the projected image based upon lattice points, the image projection system generating a correspondence table in which specified coordinates of the lattice points in data of the first captured image and coordinates of stored lattice points in pattern image data are registered in association with each other. 
     
     
         10 . The image projection system according to  claim 8 , comprising:
 a first projector that includes the first projection section and the first imaging section; and   a second projector that includes the second projection section and the second imaging section.   
     
     
         11 . A control method for an image projection system comprising:
 projecting a first image by a first projecting section;   capturing a range including at least a part of the first image projected by the first projecting section and at least a part of a second image by a first imaging section;   projecting the second image by a second projecting section and   capturing a range including at least a part of the first image projected by the first projecting section and at least a part of the second image projected by a second imaging section, wherein   calculating correction data for correcting a color of the projected image on the basis of a first captured image obtained by capturing, with the first imaging section, at least a part of the first image projected by the first projecting section, a second captured image obtained by capturing, with the second imaging section, at least apart of the second image projected by the second projecting section, a third captured image obtained by capturing, with the second imaging section, at least a part of the first image projected by the first projecting section.