Image processing system, projector and image processing method

Abstract

To provide an image processing system and the like which can perform an image distortion correction and focus adjustment approximately at the same time without changing a projecting position intended by a user, a projector includes: a distortion correcting section 120 which corrects image signals to adjust the distortion in an image; an image projection section 190 which includes a lens unit 198 having a focus adjustment function, the lens unit 198 projecting an image based on the corrected image signals; a control section 160 and a focus lens driving section 162 which control the driving of the lens unit 198 so that the focal length of the lens unit 198 to an image projection area changes; a sensing section 180 which senses the projected image; and a distortion correction deriving section 140 which derives the focal length to the center of the image projection area and also an amount of distortion correction provided by the distortion correcting section 120, based on sensing information.

Description

technical field [0001] The invention relates to an image processing system capable of image distortion correction and focus adjustment, a projector and an image processing method. Background technique [0002] Due to the relationship between an image display device such as a projector and the position of an image to be projected, the image may be distorted, that is, a so-called trapezoidal distortion may occur in the vertical or horizontal direction. Also, even when the image display device and the projection object are almost directly facing each other, if the distance between the image display device and the projection object changes, the focus of the image becomes blurred. [0003] Therefore, when an image display device displays an image, it is necessary to display the image in a state where distortion of the image or blurring of the focus is eliminated. [0004] However, in a general projector with an image distortion correction function and an auto-focus function, the...

AI Technical Summary

Problems solved by technology

[0012] However, when the main body of the projector is not substantially facing the screen, trapezoidal distortion occurs in the horizontal direction. Therefore, if the processing is performed on the premise that the main body of the projector and the screen are substantially facing the screen, it cannot be properly processed. Correct keystone distortion in horizontal direction

[0013] In addition, when the pitch angle of the projector body, etc. is adjusted so as to forcibly project an image at the center of the screen regardless of the projection position desired by the user, an image that conforms to the user's purpose cannot be displayed.

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