Projector and projection condition adjustment method

A projector adapted to project an image, comprising:

• an image projection section adapted to project the image;
• an imaging section adapted to shoot the image projected;
• an input image generation section adapted to generate an input image based on image information input to the projector;
• a first calibration image generation section adapted to generate a first calibration image having a first pattern including a plurality of detection areas superimposed on the input image to thereby make the image projection section project the first calibration image, the first pattern having a first portion and a second portion having a grayscale different from a grayscale of the first portion and rimming the first portion;
• a projection condition adjustment section adapted to adjust a projection condition of the image based on the detection areas detected from the first calibration image shot by the imaging section;
• a second calibration image generation section adapted to generate a second calibration image having a second pattern, which has substantially the same shape as that of the first pattern, and is disposed at substantially the same position as that of the first pattern, and is entirely provided with the same grayscale as that of the second portion, superimposed on the input image, and make the image projection section project the second calibration image;
• a difference image obtaining section adapted to obtain a difference image corresponding to a difference between the first calibration image shot by the imaging section and the second calibration image shot by the imaging section;
• and
• an area detection section adapted to detect the first portion in the detection areas from the difference image,
• wherein the projection condition adjustment section adjusts the projection condition of the image based on the first portion detected by the area detection section.