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

An image display system:

• an image display section that displays a first calibration image having a first grayscale value of a color and a second calibration image having a second grayscale value of the color, the first grayscale value and the second grayscale value being different from each other;
• an environment determination section that captures the first and second calibration images and ambient light so as to generate first and second luminance values corresponding to the respective first and second calibration images displayed on a display being affected by the ambient light area under on-site environment;
• and
• a grayscale correction section that performs grayscale correction, based on a first ratio between the first and second luminance values, and based on a second ration between third and fourth luminance values, the third and fourth luminance values corresponding to the respective first and second calibration images displayed on an area under an ideal environment.

A projector comprising:

• image display means for projecting a first calibration image having a first grayscale value of a color and a second calibration image having a second grayscale value of the color, the first grayscale value and the second grayscale value being different from each other;
• environment determination means for capturing the first and second calibration images and ambient light so as to generate first and second luminance values corresponding to the respective first and second calibration images projected on a display area being affected by the ambient light under on-site environment;
• and
• grayscale correction means for performing grayscale correction, based on a first ratio between the first and second luminance values, and based on a second ratio between third and fourth luminance values, the third and fourth luminance values corresponding to the respective first and second calibration images projected on an area under an ideal environment.

A projector comprising:

• an image display section that projects a first calibration image having a first grayscale value of a color and a second calibration image having a second grayscale value of the color, the first grayscale value and the second grayscale value being different from each other;
• an environment determination section that captures the first and second calibration images and ambient light so as to generate first and second luminance values corresponding to the respective first and second calibration images projected on a display area being affected by the ambient light under on-site environment;
• and
• a grayscale correction section that performs grayscale correction, based on a first ratio between the first and second luminance values, and based on a second ratio between third and fourth luminance values, the third and fourth luminance values corresponding to the respective first and second calibration images projected on an area under an ideal environment.

A computer-readable information storage medium storing a program causing a computer to function as:

• display control means for causing image display means to display a first calibration image having a first grayscale value of a color and a second calibration image having a second grayscale value of the color, the first grayscale value and the second grayscale value being different from each other;
• environment determination means for capturing the first and second calibration images and ambient light so as to generate first and second luminance values corresponding to the respective first and second calibration images displayed on a display area being affected by the ambient light under on-site environment;
• and
• grayscale correction means for performing grayscale correction, based on a first ratio between the first and second luminance values, and based on a second ratio between third and fourth luminance values, the third and fourth luminance values corresponding to the respective first and second calibration images displayed on an area under an ideal environment.

An image processing method comprising:

• displaying calibration images for color conversion in different colors;
• capturing the calibration images in different colors so as to generate respective color information corresponding to the calibration images for the color conversion;
• displaying a first calibration image having a first grayscale value of a color and a second calibration image having a second grayscale value of the color, the first grayscale value and the second grayscale value being different from each other for performing grayscale correction;
• generating first and second luminance values by capturing the first and second calibration images and ambient light corresponding to the respective first and second calibration images displayed on a display area being affected by the ambient light under on-site environment and third and fourth luminance values corresponding to the respective first and second calibration images displayed on an area under the ideal environment;
• performing the grayscale correction, based on a first ratio between the first and second luminance values, and based on a second ratio between the third and fourth luminance values.

An image display system comprising:

• an image display section that displays calibration images;
• an environment determination section that determines on-site environment being affected by ambient light in which the image display section is used and generates on-site environmental information which indicates the on-site environment;
• and
• a grayscale correction section that performs grayscale correction based on the on-site environmental information;
• wherein the image display section displays the calibration images and also displays an image that has been subjected to the grayscale correction,
• the environment determination section captures the calibration images and the ambient light and generates two types of the on-site environmental luminance values, and
• the grayscale correction section performs the grayscale correction, based on a first ratio between two types of ideal environmental luminance values that indicates an ideal environment corresponding to the respective two types of the on-site environmental information, and based on a second ratio between the two types of the on-site environmental luminance values.

A projector comprising:

• an image display section that displays calibration images;
• an environment determination section that determines on-site environment being affected by ambient light in which the image display section is used and generates on-site environmental information which indicates the on-site environment;
• and
• a grayscale correction section that performs grayscale correction based on the on-site environmental information;
• wherein the image display section displays the calibration images and also displays an image that has been subjected to the grayscale correction,
• the environment determination section captures the calibration images and the ambient 1ight and generates two types of the on-site environmental luminance values, and
• the grayscale correction section performs the grayscale correction, based on a first ratio between two types of ideal environmental luminance values that indicates an ideal environment corresponding to the respective two types of the on-site environmental information, and based on a second ratio between the two types of the on-site environmental luminance values.