Pixel position acquiring method, image processing apparatus, program for executing pixel position acquiring method on computer, and computer-readable recording medium having recorded thereon program

The pixel position acquiring method according to

• wherein the first line image and the second line image each includes at least four markers providing the correspondence with the individual image-capturing data, and
• the cutting of the plurality of image-capturing lines mapped on the first or second image-capturing data as the region including each image-capturing line includes:
• setting, on the basis of a marker correspondence of the first line image and the first image-capturing data, a transform expression of the first line image and the first image-capturing data;
• setting, on the basis of a marker correspondence of the second line image and the second image-capturing data, a transform expression of the second line image and the second image-capturing data;
• setting a region surrounding each straight line of the first or second line image;
• transforming the region surrounding each straight line of the first or second line image by the set transform expression;
• and
• cutting, on the basis of the transformed region, each image-capturing line of the first image-capturing data or the second image-capturing data.

An image processing apparatus that captures a display image displayed on a screen by an image-capturing device, and acquires, on the basis of image-capturing data, a correspondence between a pixel position of an image generating device to be projected on the screen and a position where the pixel position is mapped on the image-capturing data, the image processing apparatus comprising:

• a unit that causes a first line image having a plurality of straight lines extending along a vertical direction of the image generating device to be displayed on the screen;
• a unit that captures a display image based on the first line image by the image-capturing device and acquires first image-capturing data;
• a unit that causes a second line image having a plurality of straight lines extending along a horizontal direction of the image generating device to be displayed on the screen;
• a unit that captures a display image based on the second line image by the image-capturing device and acquires second image-capturing data;
• a unit that cuts a plurality of image-capturing lines mapped on the first image-capturing data per a region including each image-capturing line;
• a unit that sets an approximate function expressing each image-capturing line in the first image-capturing data on the basis of the region of each cut image-capturing line;
• a unit that cuts a plurality of image-capturing lines mapped on the second image-capturing data per a region including each image-capturing line;
• a unit that sets an approximate function expressing each image-capturing line in the second image-capturing data on the basis of the region of each cut image-capturing line;
• and
• a unit that finds, on the basis of the approximate functions set by the first image-capturing data and the second image-capturing data, an association between the pixel position of the image generating device and the position where the pixel position is mapped on the image-capturing data.

A pixel position acquiring method that captures a display image displayed on a screen by an image-capturing device, and acquires, on the basis of image-capturing data, a correspondence between a pixel position of an image generating device to be displayed on the screen and a position where the pixel position is mapped on the image-capturing data, the pixel position acquiring method comprising:

• causing an image having a gradation line subjected to a gradation along an extension direction to be displayed on the screen;
• capturing the display image displayed on the screen by the image-capturing device and acquiring the image-capturing data;
• and
• associating, on the basis of the gradation line displayed on the screen and a gradation image-capturing line mapped on the image-capturing data, the pixel position of the image generating device with the position where the pixel position is mapped on the image-capturing data.