Calibration method and apparatus for camera
A calibration method and technology of a calibration device, which are applied in the directions of image analysis, image enhancement, instruments, etc., can solve the problem of time-consuming and other problems, and achieve the effect of simplifying the laying preparation.
Inactive Publication Date: 2014-03-26
CLARION CO LTD
View PDF10 Cites 23 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0016] However, the white line grid for correction is directly drawn or laid on the plane under the vehicle. Therefore, in the case of a large vehicle such as large-scale construction equipment, a large calibration chart is required. Man-hours required for preparations required for corrections such as laying
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] An example of the calibration device according to the present invention will be described below.
[0030] figure 1 It is a figure which shows an example of the calibration apparatus of this Example.
[0031] A calibration device 100, which performs camera calibration based on a plurality of images, and the plurality of images includes a preset calibration logo by using a plurality of cameras installed on the vehicle on a road surface where the vehicle is installed. The surrounding area of the vehicle is obtained by photographing, and the calibration device 100 includes: a calibration target 101; a camera 1, a camera 2, a camera 3, and a camera 4 as an imaging unit; a camera interface 102; a computing device 103; a RAM 104 as a storage unit; ROM 105 of the storage unit; input device 106 ; and display device 107 .
[0032] The calibration target 101, which is a mark for calibration, has information necessary for the calibration performed in the present invention. Pho...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a calibration method and apparatus for cameras, capable of eliminating the need for achieving relative positioning accuracy between a vehicle and a calibration index and simplifying the preparation for laying down a calibration index. The camera calibration method is provided for calibrating cameras using a plurality of images generated by imaging a peripheral area of a vehicle by the plurality of cameras, wherein the peripheral area of a vehicle includes a calibration index pre-set on a road surface where the vehicle is positioned, the plurality of cameras are mounted on the vehicle, and the calibration index includes a plurality of intersections formed by at least two first parallel straight lines and two second parallel straight lines having different inclination from the two first parallel straight lines. The camera calibration method includes the steps of generating a bird's-eye-view video by viewpoint-converting each of the plurality of images based on a first camera parameter that is stored in advance; recognizing the plurality of intersections from the generated bird's-eye-view video; and calculating a second camera parameter, via which a non-deviated bird's-eye-view video can be generated, based on the plurality of recognized intersections and information on positions and poses of the plurality of cameras.
Description
technical field [0001] The invention relates to a camera calibration method and device. Background technique [0002] By displaying the image of the rear of the vehicle captured by the on-board camera on the on-board monitor, the situation around the rear of the vehicle in the blind spot from the driver can be visually observed as an image displayed on the on-board monitor, thereby improving the visibility of the vehicle when it is backing up . [0003] When displaying the image of such a vehicle-mounted camera on a vehicle-mounted monitor, in order to correct the installation state of the vehicle-mounted camera to the vehicle, a mark for calibration is provided at the rear of the vehicle, and while observing the image of the mark for calibration displayed on the vehicle-mounted monitor, While properly adjusting the installation state of the vehicle camera to properly present the image of the calibration logo. [0004] Furthermore, the image displayed on the on-vehicle mon...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00G06T7/00
CPCG06T2207/30252H04N17/002G06T2207/30204G06T7/0018G06T7/80
Inventor 坂野盛彦佐藤启二高田祐辅冈田司
Owner CLARION CO LTD