Image processing system, projector, image processing method, and information storage medium

Claim 2

An image processing system comprising: image projection means for projecting an image onto a projection plane; a sensor which images a display region within the projection plane; storage means for storing ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; light separating means for deriving output light data indicating output light outputted from the image projection means and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; projection-plane-influence-degree estimating means for estimating an influence degree due to the projection plane based on the output light data and the ideal-environment-measurement data; sensing data generating means for generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and correcting means for updating a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection means projects an image onto the projection plane based on the image information corrected by the correcting means.

Claim 3

The image processing system as defined in claim 1 , wherein the ideal-environment-measurement data and the output light data are represented by XYZ tristimulus values, wherein the projection-plane-influence-degree estimating means estimates a reflectance of the projection plane based on a ratio between each of X-, Y- and Z-values in the ideal-environment-measurement data relating to the first or second calibration image and each of X-, Y- and Z-values in the output light data relating to the first or second calibration image, and wherein the sensing data generating means generates the viewing-environment-estimation data based on a value obtained by multiplying each of X-, Y- and Z-values in the ideal-environment-measurement data relating to each of the calibration images by the reflectance.

Claim 4

The image processing system as defined in claim 1 , wherein the projection-plane-influence-degree estimating means estimates a reflectance for each of R-, G- and B-colors based on the ideal-environment-measurement data and the output light data, and wherein the sensing data generating means generates the viewing-environment-estimation data based on the reflectance for each of the R-, G- and B-colors and each of R-, G- and B-values inputted as the image information.

Claim 5

The image processing system as defined in claim 2 , wherein the sensing data generating means generates darkroom-condition-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under a darkroom condition for each of the calibration images through the sensor based on the influence degree and the ideal-environment-measurement data, and also generates the viewing-environment-estimation data based on the darkroom-condition-estimation data and the ambient light data.

Claim 6

The image processing system as defined in claim 4 , wherein the ambient light data, the darkroom-condition-estimation data and the viewing-environment-estimation data are represented by XYZ tristimulus values, and wherein the sensing data generating means generates the viewing-environment-estimation data by adding each of X-,Y- and Z-values in the ambient light data to each of X-, Y- and Z-values in the darkroom-condition-estimation data.

Claim 7

An image processing system comprising: an image projection section which projects an image onto a projection plane; a sensor which images a display region within the projection plane; a storage section which stores ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; a light separating section which derives output light data indicating output light outputted from the image projection section and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; a projection-plane-influence-degree estimating section which estimates an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; a sensing data generating section which generates viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and a correcting section which updates a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection section projects an image onto the projection plane based on the image information corrected by the correcting section.

Claim 8

An image processing system comprising: an image projection section which projects an image onto a projection plane; a sensor which images a display region within the projection plane; a storage section which stores ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; a light separating section which derives output light data indicating output light outputted from the image projection section and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; a projection-plane-influence-degree estimating section which estimates an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; a sensing data generating section which generates viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and a correcting section which updates a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection section projects an image onto the projection plane based on the image information corrected by the correcting section.

Claim 9

A projector comprising: image projection means for projecting an image onto a projection plane; a sensor which images a display region within the projection plane; storage means for storing ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; light separating means for deriving output light data indicating output light outputted from the image projection means and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; projection-plane-influence-degree estimating means for estimating an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; sensing data generating means for generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and correcting means for updating a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection means projects an image onto the projection plane based on the image information corrected by the correcting means.

Claim 10

A projector comprising: image projection means for projecting an image onto a projection plane; a sensor which images a display region within the projection plane; storage means for storing ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; light separating means for deriving output light data indicating output light outputted from the image projection means and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; projection-plane-influence-degree estimating means for estimating an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; sensing data generating means for generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and correcting means for updating a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection means projects an image onto the projection plane based on the image information corrected by the correcting means.

Claim 11

A projector comprising: an image projection section which projects an image onto a projection plane; a sensor which images a display region within the projection plane; a storage section which stores ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; a light separating section which derives output light data indicating output light outputted from the image projection section and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; a projection-plane-influence-degree estimating section which estimates an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; a sensing data generating section which generates viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and a correcting section which updates a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection section projects an image onto the projection plane based on the image information corrected by the correcting section.

Claim 12

A projector comprising: an image projection section which projects an image onto a projection plane; a sensor which images a display region within the projection plane; a storage section which stores ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; a light separating section which derives output light data indicating output light outputted from the image projection section and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; a projection-plane-influence-degree estimating section which estimates an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; a sensing data generating section which generates viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and a correcting section which updates a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection section projects an image onto the projection plane based on the image information corrected by the correcting section.

Claim 13

An information storage medium storing a computer-readable program for causing a computer to function as: storage means for storing ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through a predetermined sensor; light separating means for deriving output light data indicating output light outputted from an image projection section and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; projection-plane-influence-degree estimating means for estimating an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; sensing data generating means for generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and correcting means for updating a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection section projects an image onto the projection plane based on the image information corrected by the correcting means.

Claim 14

An information storage medium storing a computer-readable program for causing a computer to function as: storage means for storing ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through a predetermined sensor; light separating means for deriving output light data indicating output light outputted from an image projection section and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; projection-plane-influence-degree estimating means for estimating an influence degree due to the projection plane, based on the output light data and the ideal-environment-measurement data; sensing data generating means for generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and correcting means for updating a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection section projects an image onto the projection plane based on the image information corrected by the correcting means.

Claim 15

The information storage medium as defined in claim 9 , wherein the ideal-environment-measurement data and the output light data are represented by XYZ tristimulus values, wherein the projection-plane-influence-degree estimating means estimates a reflectance of the projection plane based on a ratio between each of X-, Y- and Z-values in the ideal-environment-measurement data relating to the first or second calibration image and each of X-, Y- and Z-values in the output light data relating to the first or second calibration image, and wherein the sensing data generating means generates the viewing-environment-estimation data based on a value obtained by multiplying each of X-, Y- and Z-values in the ideal-environment-measurement data relating to each of the calibration images by the reflectance.

Claim 16

The information storage medium as defined in claim 9 , wherein the projection-plane-influence-degree estimating means estimates a reflectance for each of R-, G- and B-colors based on the ideal-environment-measurement data and the output light data, and wherein the sensing data generating means generates the viewing-environment-estimation data based on the reflectance for each of the R-, G- and B-colors and each of R-, G- and B-values inputted as the image information.

Claim 17

The information storage medium as defined in claim 10 , wherein the sensing data generating means generates darkroom-condition-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under a darkroom condition for each of the calibration images through the sensor based on the influence degree and the ideal-environment-measurement data, and also generates the viewing-environment-estimation data based on the darkroom-condition-estimation data and the ambient light data.

Claim 18

The information storage medium as defined in claim 12 , wherein the ambient light data, the darkroom-condition-estimation data and the viewing-environment-estimation data are represented by XYZ tristimulus values, and wherein the sensing data generating means generates the viewing-environment-estimation data by adding each of X-,Y- and Z-values in the ambient light data to each of X-, Y- and Z-values in the darkroom-condition-estimation data.

Claim 19

An image processing method of correcting image information to be inputted so as to reproduce an ideal image appearance, comprising: generating ideal-environment-measurement data by measuring a display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through a predetermined sensor; generating first viewing-environment-measurement data by measuring the display region on which a first calibration image among the calibration images is displayed under a viewing environment through the sensor; generating second viewing-environment-measurement data by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; deriving output light data indicting output light outputted from an image projection section and ambient light data indicating ambient light under the viewing environment, based on a difference between the first and the second viewing-environment-measurement data; estimating an influence degree due to the projection plane based on the output light data and the ideal-environment-measurement data; generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; updating predetermined image correcting data based on the viewing-environment-estimation data; correcting the image information based on the updated image correcting data; and projecting an image onto the projection plane based on the corrected image information.

Claim 20

An image processing method of correcting image information to be inputted so as to reproduce an ideal image appearance, comprising: generating ideal-environment-measurement data by measuring a display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through a predetermined sensor; generating first viewing-environment-measurement data by measuring the display region on which a first calibration image among the calibration images is displayed under a viewing environment through the sensor; generating second viewing-environment-measurement data by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; deriving output light data indicting output light outputted from an image projection section and ambient light data indicating ambient light under the viewing environment, based on a difference between the first and the second viewing-environment-measurement data; estimating an influence degree due to the projection plane based on the output light data and the ideal-environment-measurement data; generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; updating predetermined image correcting data based on the viewing-environment-estimation data; correcting the image information based on the updated image correcting data; and projecting an image onto the projection plane based on the corrected image information.

Claim 21

The image processing method as defined in claim 14 , wherein the ideal-environment-measurement data and the output light data are represented by XYZ tristimulus values, the method further comprising: estimating a reflectance of the projection plane based on a ratio between each of X-, Y- and Z-values in the ideal-environment-measurement data relating to the first or second calibration image and each of X-, Y- and Z-values in the output light data relating to the first or second calibration image when the influence degree due to the projection plane is to be estimated; and generating the viewing-environment-estimation data based on a value obtained by multiplying each of X-, Y- and Z-values in the ideal-environment-measurement data relating to each of the calibration images by the reflectance.

Claim 22

The image processing method as defined in claim 14 , further comprising: estimating a reflectance for each of R-, G- and B-colors based on the ideal-environment-measurement data and the output light data when the influence degree due to the projection plane is to be estimated; and generating the viewing-environment-estimation data based on the reflectance for each of the R-, G- and B-colors and each of the R-, G- and B-values inputted as the image information.

Claim 23

The image processing method as defined in claim 16 , further comprising: generating darkroom-condition-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under a darkroom condition for each of the calibration images through the sensor based on the influence degree and the ideal-environment-measurement data, and also generating the viewing-environment-estimation data based on the darkroom-condition-estimation data and the ambient light data.

Claim 24

The image processing method as defined in claim 17 , wherein the ambient light data, the darkroom-condition-estimation data and the viewing-environment-estimation data are represented by XYZ tristimulus values, the method further comprising generating the viewing-environment-estimation data by adding each of X-, Y- and Z-values in the ambient light data to each of X-, Y- and Z-values in the darkroom-condition-estimation data.