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Image correction method of projector and image correction system

An image correction and projector technology, applied in the field of image processing methods and systems thereof, can solve problems such as deformation of projection images

Active Publication Date: 2018-03-06
林宗翰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the projection screen output by the projector will be deformed due to the design of the internal optical mirror group

Method used

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  • Image correction method of projector and image correction system
  • Image correction method of projector and image correction system
  • Image correction method of projector and image correction system

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Experimental program
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Embodiment Construction

[0025] figure 1 is a block diagram of an image correction system according to an embodiment of the present invention. Please refer to figure 1 , the image correction system 100 includes an image acquisition device 110 , a projector 120 and a processor 130 . Here, the processor 130 is respectively connected to the image capturing device 110 and the projector 120 through a wired connection or a wireless connection. That is, the image capturing device 110 and the projector 120 communicate with the processor 130 through wired transmission or wireless transmission, so that the processor 130 can receive data from the image capturing device 110 and transmit the data to the projector 120 .

[0026] The image capturing device 110 is, for example, a video camera or a camera using a charge coupled device (CCD) lens, a complementary metal oxide semiconductor transistors (CMOS) lens, or the like.

[0027] The projector 120 is, for example, a cathode ray tube (cathode ray tube, CRT) proj...

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Abstract

The invention provides an image correction method of a projector and an image correction system. Image acquisition equipment acquires a first image by shooting an entity correction plate, and acquiresa second image by shooting an output image which is obtained by outputting a correction plate image to a projection screen through the projector; the processor analyzes the first image to acquire a first correction parameter and a first homography matrix of the image acquisition equipment, and executes the reverse distortion operation on the second image based on the first correction parameter, thereby obtaining a third image; the processor analyzes the third image to acquire a second correction parameter and a second homography matrix of the projector. Based on the second correction parameter, the second homography matrix and the first homography matrix, the processor performs compensation operation on an original image to be output through the projector so as to acquire the compensatedimage. Therefore, the projection precision can be improved.

Description

technical field [0001] The present invention relates to an image processing method and its system, and in particular to an image correction method and image correction system for a projector. Background technique [0002] Generally, the projector has a luminous light source inside, and after passing through the optical mirror group, the image can be projected onto a solid plane for viewing. Projectors also play a key component role in three-dimensional (3D) scanners in the form of structured light and 3D printers in the form of photocuring. However, the projected picture output by the projector will be deformed due to the design of the internal optical mirror group. [0003] There are two main factors for the deformation of the projector, one of which is that the light is refracted to the imaging surface, which is prone to distortion; the other is caused by the non-perpendicularity between the optical axis and the imaging plane, or the assembly of optical mirrors. Skew off...

Claims

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Application Information

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IPC IPC(8): H04N9/31
CPCH04N9/3185
Inventor 林宗翰
Owner 林宗翰