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

An image processing system comprising:

• a sensing section which senses a sensing region onto which a predetermined image is projected and for outputting sensing information;
• a luminance distribution analysis section which analyzes a luminance distribution in a projection area included in the sensing region, based on the sensing information;
• a storage section which stores angle correction data in which ratio of average luminance values for a plurality of different regions in the projection area is associated with derivation coordinates for deriving coordinates of the projection area, and also for storing coordinate data indicating the derivation coordinates for the projection area;
• and
• an image signal correction section which corrects image signals based on the coordinate data so that a distortion in the projected image is corrected,
• wherein the luminance distribution analysis section refers to the angle correction data depending on the luminance distribution in the projection area to correct the derivation coordinates in the coordinate data based on the angle correction data.

A projector comprising:

• sensing means for sensing a sensing region onto which a predetermined image is projected and for outputting sensing information;
• luminance distribution analysis means for analyzing a luminance distribution in a projection area included in the sensing region, based on the sensing information;
• storage means for storing angle correction data in which ratio of average luminance values for a plurality of different regions in the projection area is associated with derivation coordinates for deriving coordinates of the projection area, and also for storing coordinate data indicating the derivation coordinates for the projection area;
• and
• image signal correction means for correcting image signals based on the coordinate data so that a distortion in the projected image is corrected;
• and
• image projection means for projecting an image based on the corrected image signals,
• wherein the luminance distribution analysis means refers to the angle correction data depending on the luminance distribution in the projection area to correct the derivation coordinates in the coordinate data based on the angle correction data.

A projector comprising:

• a sensing section which senses a sensing region onto which a predetermined image is projected and for outputting sensing information;
• a luminance distribution analysis section which analyzes a luminance distribution in a projection area included in the sensing region, based on the sensing information;
• a storage section which stores angle correction data in which ratio of average luminance values for a plurality of different regions in the projection area is associated with derivation coordinates for deriving coordinates of the projection area, and also for storing coordinate data indicating the derivation coordinates for the projection area;
• and
• an image signal correction section which corrects image signals based on the coordinate data so that a distortion in the projected image is corrected;
• and
• an image projection section which projects an image based on the corrected image signals,
• wherein the luminance distribution analysis section refers to the angle correction data depending on the luminance distribution in the projection area to correct the derivation coordinates in the coordinate data based on the angle correction data.

A computer-readable program for causing a computer to function as:

• sensing control means for causing sensing means to sense a sensing region onto which a predetermined image is projected and for outputting sensing information;
• luminance distribution analysis means for analyzing a luminance distribution in a projection area included in the sensing region, based on the sensing information;
• storage control means for storing region angle correction data in which ratio of average luminance values for a plurality of different regions in the projection area is associated with derivation coordinates for deriving coordinates of the projection area at a predetermined storage, and also for storing coordinate data indicating the derivation coordinates for the projection area at the predetermined storage;
• and
• image signal correction means for correcting image signals based on the coordinate data so that a distortion in the projected image is corrected,
• wherein the luminance distribution analysis means refers to the angle correction data depending on the luminance distribution in the projection area to correct the derivation coordinates in the coordinate data based on the angle correction data.

An image processing method comprising:

• sensing a sensing region onto which a predetermined image is projected and outputting sensing information;
• analyzing a luminance distribution in a projection area included in the sensing region, based on the sensing information;
• referring angle correction data in which ratio of average luminance values for a plurality of different regions in the projection area is associated with derivation coordinates for deriving coordinates of the projection area;
• correcting the derivation coordinates in coordinate data indicating the derivation coordinates for the projection area based on the angle correction data;
• and
• correcting image signals based on the coordinate data so that a distortion in the projected image is corrected.