CN112135111A

CN112135111A - Projection picture correction method

Info

Publication number: CN112135111A
Application number: CN202011000538.4A
Authority: CN
Inventors: 田富真; 唐印; 于金石; 贺文绮; 杨启明
Original assignee: Art Engineering Corp Of Luxun Academy Of Fine Arts
Current assignee: Art Engineering Corp Of Luxun Academy Of Fine Arts
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2020-12-25

Abstract

The invention discloses a projection picture correction method, which relates to the technical field of image processing and comprises the following steps: adjusting one or more projectors to enable the projectors to fill the whole curtain with the projected pictures; projecting a reference image to a curtain to obtain a reference image, and shooting the reference image to obtain a reference picture; criss-cross grid lines are arranged on the reference image; comparing the reference image with the reference picture to obtain a deformation area and a deformation amplitude of the reference picture; and inversely adjusting the reference image based on the deformation area and the deformation amplitude so as to enable grid lines in the reference image to be in a vertical and horizontal state. After inverse adjustment, the picture on the curtain can not be locally distorted, and the projected image can be matched with the outline of the curtain, so that the audience looks more real when watching.

Description

Projection picture correction method

Technical Field

The invention relates to the technical field of image processing, in particular to a projection picture correction method.

Background

In museums, memorial halls and other exhibition halls, a projection device is commonly used for displaying scenes, and the common projection is also performed on a plane curtain. However, in order to restore the landform or historical scenes, the setting of the exhibition hall can make the curtain present a certain outline, but in the projection process, the images are distorted and deformed due to the unevenness of the curtain, so that the viewing experience of the audience is influenced.

Disclosure of Invention

The invention provides a projection picture correction method, which comprises the steps of adjusting one or more projectors to enable the projectors to fill the projected pictures in the whole curtain; projecting a reference image to a curtain to obtain a reference image, and shooting the reference image to obtain a reference picture; criss-cross grid lines are arranged on the reference image; comparing the reference image with the reference picture to obtain a deformation area and a deformation amplitude of the reference picture; and inversely adjusting the reference image based on the deformation area and the deformation amplitude so as to enable grid lines in the reference image to be in a vertical and horizontal state.

The invention is further provided with: the inverse adjustment is to perform equal amplitude inverse deformation on the reference image in the deformation region.

The invention is further provided with: the position of the edge of the reference image is kept unchanged during the inverse adjustment.

The beneficial technical effects of the invention are as follows:

after inverse adjustment, the picture on the curtain can not be locally distorted, and the projected image can be matched with the outline of the curtain, so that the audience looks more real when watching.

Drawings

FIG. 1 shows a schematic representation of a reference image and a reference photograph prior to inverse adjustment of the present invention;

FIG. 2 shows a schematic of a reference image and a reference photograph after inverse adjustment of the present invention.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

The invention provides a projection picture correction technology, which comprises the following steps: and adjusting one or more projectors to enable the projectors to fill the whole curtain with the projected pictures. The reference image is projected to the curtain to obtain a reference image, and the reference image is shot to obtain a reference picture.

And setting criss-cross grid lines on the reference image, and comparing the reference image with the reference picture to obtain a deformation area and a deformation amplitude of the reference picture. And inversely adjusting the reference image based on the deformation area and the deformation amplitude so as to enable grid lines in the reference image to be in a vertical and horizontal state.

The inverse adjustment is based on deforming the reference image in a constant amplitude inverse direction within the deformation region. The specific process is as follows: before inverse adjustment, the reference image has a pixel point A and a pixel point B, after projection deformation, the pixel point at the upper pixel point B of the reference picture moves to other places, and the pixel point at the pixel point A moves to the pixel point B. After inverse adjustment, the pixel point at the pixel point B in the reference image is moved to the pixel point A, and after projection deformation, the pixel point is directly projected to the position of the pixel point B in the reference picture, so that the reference picture after inverse adjustment is not distorted.

The position of the edge of the reference image is kept unchanged during the inverse adjustment.

The contrary regulation is gone on to the profile of specific curtain, and the back is adjusted to the contrary, and the picture on the curtain can not take place local distortion, and the profile of curtain can be matchd to the image of throwing, and for example when the curtain presents the profile of mountain chain or basin, the image on the curtain can cooperate the curtain to demonstrate comparatively real mountain chain or basin's pattern for audience looks truer when watching.

While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims

1. A method for correcting a projection picture is characterized by comprising the following steps:

adjusting one or more projectors to enable the projectors to fill the whole curtain with the projected pictures;

projecting a reference image to a curtain to obtain a reference image, and shooting the reference image to obtain a reference picture;

criss-cross grid lines are arranged on the reference image;

comparing the reference image with the reference picture to obtain a deformation area and a deformation amplitude of the reference picture;

and inversely adjusting the reference image based on the deformation area and the deformation amplitude so as to enable grid lines in the reference image to be in a vertical and horizontal state.

2. The projection screen correction method according to claim 1, wherein the inverse adjustment is a deformation of the reference image in the deformation region in a constant amplitude inverse direction.

3. The projection picture correction method according to claim 1, characterized in that: the position of the edge of the reference image is kept unchanged during the inverse adjustment.