Image processing device, projector, and method of controlling projector

Abstract

The present invention relates to an image processing device, a projector and a method of controlling projector. The extraction accuracy and the detection accuracy of a detection image projected on a projection surface are improved. A detection image generation section generates a detection image, which is an image for detection a state of a projection image, and includes a plurality of detection image parts, and background images covering respective peripheries of the detection image parts. Each of the detection image parts includes a plurality of regions with respective luminance values different from each other, and the background images have luminance values lower than the luminance values of the detection image parts. The detection image generation section changes at least one of a luminance distribution of each of the detection image parts of the detection image to be generated and a size of each of the background images so that a luminance distribution of each of the detection image parts of the taken detection image obtained by imaging is approximated to a luminance distribution of corresponding one of the detection image parts of the detection image.

Description

technical field [0001] The present invention relates to a projector for projecting and displaying an image on a projected surface. Background technique [0002] When using a projector to project and display an image on a surface to be projected such as a screen, usually adjustments are made to match the relative positional relationship between the projector and the surface to be projected. As such adjustments, there are focus adjustment to adjust the shift of the focus of the image projected on the projected surface (hereinafter also referred to as "projected image"), and correction of distortion in the image range of the projected image (hereinafter also referred to as "projected image"). called "keystone"), etc. [0003] The above-mentioned focus adjustment and keystone correction are obtained by taking a picture of a test pattern projected on the projected surface with a camera attached to the projector, and calculating the focus adjustment and keystone correction based ...

AI Technical Summary

Problems solved by technology

In addition, when the gradient change based on the ratio of the side lengths is not formed in this way, there is a problem that the extraction accuracy and detection accuracy of the test pattern deteriorate.

In addition, Patent Document 2 is based on the premise that the imaging unit and the projector are integrated. If it is a separate imaging unit that is not installed on the projector, the positional relationship between the projector and the screen and the positional relationship between the imaging unit and the screen The error is accumulated, and there is also a problem that the possibility of deterioration of the detection accuracy (extraction accuracy) of the test pattern is high.

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