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A method and apparatus for coordinate conversion of multi-camera image

A technology of image coordinates and conversion methods, which is applied in the field of image processing, can solve the problems of poor adaptability to the application site, long time consumption, and high algorithm complexity, and achieve the effects of improving accuracy and reliability, increasing operating speed, and reducing response time

Active Publication Date: 2018-12-25
BEIJING DAHENG IMAGE VISION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the prior art, the checkerboard calibration board is usually used for corner point feature extraction, and then corner point matching is performed. In this method, the algorithm complexity of corner point extraction and matching is high, and it takes a long time, which affects the computing performance of the hardware. The requirements are high, which increases the production cost of image detection equipment
Moreover, due to the influence of the light environment, the calculation results of corner point extraction and matching are not stable, prone to false detection and false matching, and poor adaptability to application sites

Method used

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Embodiment 1

[0021] The following will refer to Figure 1-2 Embodiments of the present invention will be described.

[0022] Such as figure 1 As shown, the calibration plate 03 corresponding to the first image and the second image taken by different cameras in the present invention includes: a first marking point group and a second marking point group, wherein the first marking point group includes the first marking point and the second marking point group the second marking point, the second marking point group includes the third marking point and the fourth marking point;

[0023] The first marking point group is horizontally arranged on the horizontal centerline of the calibration plate, and the second marking point group is vertically arranged on the vertical centerline of the calibration plate;

[0024] The direction marking point is set on the left side of the second marking point group, and the direction marking point is set close to the fourth marking point;

[0025] The calibra...

Embodiment 2

[0072] Such as image 3 As shown, this embodiment provides a multi-camera image coordinate conversion device 300, which includes: a connected domain analysis module 31, a marker point determination module 32, a matching module 33, and a calculation module 34; the connected domain analysis module 31 is used for Connected domain analysis is performed on the first image and the second image captured by different cameras to obtain the first connected domain image and the second connected domain image respectively;

[0073] Specifically, the image of the calibration plate 03 is obtained by the camera 01 and the camera 02, and the acquired image is transmitted to the image processing server. Since the positions of the camera 01 and the camera 02 are different when the calibration plate 03 is photographed, the image stitching During processing, the coordinate system of the first image (second image) needs to be converted to the coordinate system of the second image (first image), the...

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Abstract

The invention discloses a multi-camera image coordinate conversion method and a device, which relate to the technical field of signal generation. The method comprises the following steps: analyzing afirst image and a second image to obtain a first connected region image and a second connected region image; converting the first image and the second image to obtain a second connected region image;determining a first set of marker point coordinates and a second set of marker point coordinates based on the first connected region image, the second connected region image, and a preset area threshold; determining an image matching point group according to the first marker point coordinate group and the second marker point coordinate group; the coordinate transformation matrix being calculated according to the image matching point group and the least square formula. The technical proposal of the invention is beneficial to reducing the response time of coordinate transformation in the image processing process, improving the accuracy and reliability of calculating the coordinate transformation matrix, and reducing the requirement of hardware operation performance.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a multi-camera image coordinate conversion method and a multi-camera image coordinate conversion device. Background technique [0002] With the development of image processing technology, the use of cameras as a detection device has become increasingly widespread. Since the field of view of a single camera cannot cover the entire detection area, it is usually necessary to stitch images captured by multiple cameras to obtain a good detection Effect. Since the pixel coordinates of the target points in images captured by different cameras are based on their own image coordinate system, in order to facilitate subsequent calculations, it is generally necessary to convert the coordinate systems of all camera images into the same coordinate system. Therefore, it is necessary to use one of the cameras The image coordinate system of is the reference standard coordinate s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/33
CPCG06T7/33G06T5/80
Inventor 古佩强宋伟铭周中亚李润锋刘敏刘强强
Owner BEIJING DAHENG IMAGE VISION