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Image correcting apparatus, image correcting method, projector and projection system

A projector and image technology, applied in the field of projection systems, can solve the problem that the projected image cannot obtain a visually uniform resolution.

Inactive Publication Date: 2010-01-20
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in the prior art, since all projected images are corrected using the same correction method, when there are multiple local deformations on the screen, the corrected projected image cannot obtain a visually uniform sense of resolution in the entire projected image. The problem

Method used

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  • Image correcting apparatus, image correcting method, projector and projection system
  • Image correcting apparatus, image correcting method, projector and projection system
  • Image correcting apparatus, image correcting method, projector and projection system

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Experimental program
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Embodiment approach 1

[0053] figure 1 It is a figure which shows the structure of the projector of Embodiment 1. The projector of embodiment 1 such as figure 1 As shown, there is an image projecting unit 100 , an imaging device 200 , and an image processing device 300 .

[0054] The image projection unit 100 includes a projection control unit 110, a light modulation element 120 such as a liquid crystal panel, a light source 130, and a projection optical system 140, etc., and the projection optical system emits image light based on image data after image processing by the image processing device 300. Here, the image projecting unit 100 includes various optical systems and the like in addition to these configurations, but these are well-known components included in general projectors, so illustration is omitted.

[0055] The imaging device 200 includes an imaging optical system 210 , an imaging element 220 , and an imaging element control unit 230 for controlling the imaging element 220 by contro...

Embodiment approach 2

[0090] In Embodiment 1 above, the case where the image correction device 330 is incorporated into the projector PJ was exemplified, but the image correction device 330 may be installed as another component independent from the projector PJ, and the projector PJ and the image The correction device 330 constitutes a projection system.

[0091] Figure 9 It is a figure which shows the structure of the projection system of Embodiment 2. The projection system of Embodiment 2 is a proximity projection type projection system in which the projector PJ and the screen SCR are arranged adjacent to each other, such as Figure 9 As shown, the projection system according to Embodiment 2 includes a projector PJ, an imaging device 200 , an image correction device 330 , and a connection cable 500 .

[0092] The image correction device 330 can be realized by adding this function to an information processing device (personal computer, etc.). Furthermore, the image correction device 330 has an...

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Abstract

An image correcting apparatus (330) that corrects an image to be projected by a projector on the basis of a local distortion of the projection plane includes an amount-of-distortion calculating unit (332) that calculates the amount of distortion at each of a plurality of feature points on an image, which is projected on the projection plane, for calculating the amount of distortion on the basis of the captured image obtained by capturing the image, an image-correcting-method selecting unit (333) that selects an image correcting method according to the amount of distortion at each of the feature points, which is calculated by the amount-of-distortion calculating unit, and an image correction processing unit (334) that corrects a predetermined area of the image to be projected by the image correcting method selected by the image-correcting-method selecting unit.

Description

technical field [0001] The present invention relates to an image correction device, an image correction method, a projector and a projection system for correcting a projected image projected on a projection surface. Background technique [0002] In recent years, a proximity projection type projection system is being developed in which a projector is installed at a position adjacent to a screen, and the projector projects onto the screen. [0003] Figure 10 It is a figure explaining an example of a proximity projection type projection system. Proximity projection projection systems such as Figure 10 As shown in (a), the projector PJ is often arranged in front of the screen SCR and at a position close to the lower end of the screen SCR. [0004] In such a proximity projection type projection system, projection light from projector PJ is incident at an acute angle with respect to screen SCR. Therefore, if the screen SCR is locally deformed, the projected image is deformed a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/74G03B21/00
CPCH04N9/3197H04N9/3194H04N9/3185
Inventor 今井俊
Owner SEIKO EPSON CORP