Image processing system, projector, computer-readable medium, and image processing method

An image processing system comprising:

• an image projection section that projects a calibration image onto a projection target;
• a sensing section that senses the calibration image to generate sensing information;
• a projection target region information generation section that generates projection target region information based on the sensing information;
• a projection area information generation section that generates projection area information based on the sensing information;
• a correction information generation section that generates image distortion correction information based on the projection target region information and the projection area information;
• and
• a distortion correction section that corrects an image signal based on the image distortion correction information so that image distortion is corrected;
• the image projection section projecting an image based on the image signal that has been corrected by the distortion correction section, and
• the correction information generation section determining a first height/width ratio that indicates a height/width ratio of the projection target based on the projection target region information, and generating the image distortion correction information so that an image is displayed at the first height/width ratio when the first height/width ratio is within an acceptable range, and the image is displayed at a second height/width ratio that indicates a desired height/width ratio when the first height/width ratio is not within the acceptable range.

A projector comprising:

• an image projection means for projecting a calibration image onto a projection target;
• a sensing means for sensing the calibration image to generate sensing information;
• a projection target region information generation means for generating projection target region information based on the sensing information;
• a projection area information generation means for generating projection area information based on the sensing information;
• a correction information generation means for generating image distortion correction information so that an image is projected onto the projection target region at a desired height/width ratio, based on the projection target region information and the projection area information;
• and
• a distortion correction means for correcting an image signal based on the image distortion correction information so that image distortion is corrected;
• the image projection means projecting an image based on the image signal that has been corrected by the distortion correction means, and
• the correction information generation means determining a first height/width ratio that indicates a height/width ratio of the projection target based on the projection target region information, and generating the image distortion correction information so that an image is displayed at the first height/width ratio when the first height/width ratio is within an acceptable range, and the image is displayed at a second height/width ratio that indicates a desired height/width ratio when the first height/width ratio is without the acceptable range.

A projector comprising:

• an image projection section that projects a calibration image onto a projection target;
• a sensing section that senses the calibration image to generate sensing information;
• a projection target region information generation section that generates projection target region information based on the sensing information;
• a projection area information generation section that generates projection area information based on the sensing information;
• a correction information generation section that generates image distortion correction information so that an image is projected onto the projection target region at a desired height/width ratio based on the projection target region information and the projection area information;
• and
• a distortion correction section that corrects an image signal based on the image distortion correction information so that image distortion is corrected;
• the image projection section projecting an image based on the image signal that has been corrected by the distortion correction section, and
• the correction information generation section determining a first height/width ratio that indicates a height/width ratio of the projection target based on the projection target region information, and generating the image distortion correction information so that an image is displayed at the first height/width ratio when the first height/width ratio is within an acceptable range, and the image is displayed at a second height/width ratio that indicates a desired height/width ratio when the first height/width ratio is not within the acceptable range.

A computer-readable medium comprising a computer-readable program executed by a computer, the computer including an image projection section, a sensing section, a projection target region information generation section, a projection area information generation section, a correction information generation section, a distortion correction section, and an image projection section, the program causing the computer to perform processing for:

• the image projection section to project a calibration image onto a projection target;
• the sensing section to sense the calibration image to generate sensing information;
• the projection target region information generation section to generate projection target region information based on the sensing information;
• the projection area information generation section to generate projection area information based on the sensing information;
• the correction information generation section to generate image distortion correction information so that an image is projected onto the projection target region at a desired height/width ratio, based on the projection target region information and the projection area information;
• and
• the distortion correction section to correct an image signal based on the image distortion correction information so that image distortion is corrected;
• the image projection section projecting an image based on the image signal that has been corrected by the distortion correction section, and
• the correction information generation section determining a first height/width ratio that indicates a height/width ratio of the projection target based on the projection target region information, and generating the image distortion correction information so that an image is displayed at the first height/width ratio when the first height/width ratio is within an acceptable range, and the image is displayed at a second height/width ratio that indicates a desired height/width ratio when the first height/width ratio is not within the acceptable range.

An image processing method comprising:

• projecting a calibration image onto a projection target;
• sensing the calibration image to generate sensing information;
• generating projection target region information based on the sensing information;
• generating projection area information based on the sensing information;
• determining a first height/width ratio that indicates a height/width ratio of the projection target based on the projection area information;
• determining whether the first height/width ratio is within an acceptable range;
• generating image distortion correction information so that an image is displayed at the first height/width ratio when the first height/width ratio is within the acceptable range, and the image is displayed at a second height/width ratio that indicates a desired height/width ratio when the first height/width ratio is not within the acceptable range;
• correcting an image signal based on the image distortion correction information so that image distortion is corrected;
• and
• projecting an image based on the corrected image signal.