Projector color correcting method

Abstract

Even if the projection plane is not uniform due to the color, pattern or ambient light on the projection plane, the reproduced image projected by the projector can be made to appear in the desired color. A color correction device is used, comprising an association part (21), an associative storage memory (22), a color information acquisition part (23), a color conversion calculation part (23), a color conversion storage memory (25) and a color correction part ( 26). The associating part (21) takes the captured image (7) captured by projecting the image (5) onto the projection plane (2) and associates the pixels of the image (5) with the pixels of the captured image (7) . An associative storage memory (22) records associations. A color information acquisition section (23) acquires second color information serving as color information of each pixel of the captured image. A color conversion calculation section (23) calculates a color conversion of each image pixel based on the association between the first and second color information. The color change storage memory (25) records the color change. A color correction section (26) performs color correction by using color transformation of each pixel of the input image.

Description

technical field [0001] The present invention relates to a projector color correction device, a projector color correction method, and a projector, and more particularly, to a projector color correction device for improving color reproduction accuracy, a projector color correction method, and a projector using the device and method instrument. Background technique [0002] Projectors are used to project images onto a projection surface such as a screen. In order to use such a projector, a projector color correction method is known for correcting the colors of an image on a projection plane so that these colors exactly match the colors recorded in the image data. [0003] For example, JP-A-2001-320725 discloses a technique for an environment adaptive image processing method for correcting colors projected by a projector. This technology corrects the color of an image according to the visual environment. Therefore, the technique includes the following steps: a step of captur...

AI Technical Summary

Problems solved by technology

[0005] This traditional projector color correction method is based on the premise of a uniform color projection plane, which is a factor affecting the color reproduction of the projector

Therefore, more accurate color correction cannot be achieved if the projection plane is not uniform in color

The reason is that although the traditional color correction method obtains the color information on the projection plane, it cannot obtain the color information corresponding to the pixel level of the projected image, so it can only correct a color corresponding to the average color on the projection plane. Perform color correction processing

[0006] In addition, traditional projector color correction methods are based on the premise that there is no pattern on the projection plane, which is a factor that affects the color reproduction of the projector

Therefore, more accurate color correction cannot be achieved if there is a pattern in the projection plane

The reason is that although the traditional color correction method obtains the color information on the projection plane, it cannot obtain the detailed color information corresponding to the pixel level of the projected image, so it can only correct a color corresponding to the average color on the projection plane. Color performs color correction processing

[0007] In addition, the traditional projector color correction method is based on the premise that the ambient light illuminates the projection plane uniformly, which is a factor affecting the color reproduction of the projector

Therefore, more accurate color correction cannot be achieved if ambient light does not uniformly illuminate the projection plane

The reason is that although the traditional color correction method obtains the color information about the ambient light on the projection plane, it cannot obtain the detailed color information corresponding to the pixel level of the projected image, so it can only correct the average ambient light on the projection plane. Corresponding to a color to perform color correction processing

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