Image correction method and interactive projection system
By building a calibration network for image correction, the distortion and acquisition area cutting and missing problems when the camera acquires images is solved, and the target capture capability in the interactive projection system is ensured.
Patent Information
- Application Number
- CN202411733683.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-25
AI Technical Summary
In the prior art, when using a camera to acquire images, there are problems of distortion and cutting and missing of acquisition areas. Especially in an interactive projection system, the target may not be captured by the camera when it touches the edge area of the picture.
An image correction method is adopted to construct a calibration network, place the image in the network, transform each pixel point to the closest calibration point, and reorganize the image to correct the distortion.
It effectively solves the problem of cutting and missing image acquisition areas, ensures the camera's target capture capability in the interactive projection system, and is suitable for internal references of different lenses.
Smart Images
Figure CN119693281A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to interactive projection technology, and in particular to an image correction method and an interactive projection system. Background Art
[0002] The physical properties of the optical lens of the camera mirror cause distortion in the captured image, and the limitations of the camera installation position cause distortion in the captured image. Conventionally, affine perspective transformation is used to calibrate the four vertices, correct the captured image and the coordinate system. However, since the affine transformation is only a simple linear transformation of the image and the internal parameters of different lenses are different, there will be cutting and missing of the captured area. When applied to the interactive projection system, when the target touches the edge area of the screen, it may not be captured by the camera. Summary of the invention
[0003] The invention provides an image correction method and an interactive projection system.
[0004] The technical solution of the present invention: An image correction method is provided for correcting an image collected by a camera; the method comprises: constructing a calibration network according to the shape and size of the corrected image, wherein the calibration network is composed of a plurality of calibration points; The image is placed in the calibration network so that each pixel is transformed to the closest calibration point, and the corrected image is obtained by recombining.
[0005] The calibration points are arranged in a matrix.
[0006] An interactive projection system, wherein a host of the interactive projection system can execute the above-mentioned image correction method.
[0007] The camera of the interactive projection system is equipped with a multi-layer filter. The design of the multi-layer filter will aggravate the distortion of the image collected by the camera, and the image correction method can well solve the influence caused by the distortion.
[0008] The advantages of the present invention are reasonable design and ingenious conception. When correcting an image, the pixels of the image are reorganized nearby, and there is no problem of cutting or missing the acquisition area, so that the camera is not affected by the lens (lenses with different internal parameters are applicable, and previous lenses were all dedicated). When applied to an interactive system, there is no problem of the target touching the edge area of the screen and not being captured by the camera. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a graphic correction flow chart.
[0010] Figure 2 It is a schematic diagram of the interactive projection system structure.
[0011] In the figure, there are projector 1, laser generator 2, camera 3, host 4, screen 5, laser light curtain 6, target 7, filter 8 and filter 9. DETAILED DESCRIPTION
[0012] like Figure 2 As shown, an interactive projection system includes a projector 1, a laser generator 2, a camera 3, and a host 4. The host 4 connects the camera 3 and the projector 1. The host performs an image correction method, such as Figure 1 As shown, the image captured by the camera is corrected, and the method includes: constructing a calibration network according to the shape and size of the corrected image, and the calibration network is composed of a number of calibration points; placing the image in the calibration network, so that each pixel point is respectively transformed to the closest calibration point, and the corrected image is obtained by reorganization; each calibration point is arranged in a matrix; a picture 5 is projected on the wall by a projector 1, a laser light curtain 6 is formed on the picture 5 by a laser generator 2, and an image is collected by a camera 3; a target 6 touches a certain position on the picture 5, namely the target position, and the laser is reflected to form a target bright spot and presented on the image, and the host 4 obtains the image and corrects it, and locates the target position according to the target bright spot position on the image (after correction) and executes the corresponding instruction; the camera 3 is equipped with a multi-layer filter.
[0013] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An image correction method for correcting an image captured by a camera; characterized in that: The method comprises: constructing a calibration network according to the corrected image shape and size, wherein the calibration network is composed of a plurality of calibration points; The image is placed in the calibration network so that each pixel is transformed to the closest calibration point, and the corrected image is obtained by recombining.
2. The image correction method according to claim 1, characterized in that: The calibration points are arranged in a matrix.
3. An interactive projection system, characterized in that: The host of the interactive projection system is capable of executing the image correction method described in claim 1 or 2.
4. An interactive projection system according to claim 3, characterized in that: A multi-layer filter is installed on the camera of the interactive projection system.