Step-by-step approximation sub-pixel image positioning method and system

An image positioning and gradual approximation technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve problems such as low efficiency and inaccurate image positioning, and achieve high accuracy rate, lower false acquisition rate, and zero error acquisition The effect of high efficiency and high precision

Inactive Publication Date: 2018-08-28
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0009] In order to solve the problem of inaccurate image positioning and low efficiency, the present inven...

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  • Step-by-step approximation sub-pixel image positioning method and system
  • Step-by-step approximation sub-pixel image positioning method and system
  • Step-by-step approximation sub-pixel image positioning method and system

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Embodiment Construction

[0050] Select the steel storage control system based on machine vision and PLC as the implementation object of the method of the present invention. This embodiment targets the schematic diagram of each component of the steel storage control system of machine vision and PLC for reference figure 1 , provides a steel storage control system based on machine vision and PLC, which is used to accurately carry out storage and storage of steel, and the method and system for gradually approaching sub-pixel image positioning include a movable mechanical actuator, a PLC control device, Industrial computer and machine vision module. The movable mechanical execution device includes a mechanical arm 6 and a transmission device 9 . The PLC control device includes a motor 7, a driver 8 and a PLC9. The machine vision module includes a light source 2, an industrial camera 3, a light box 4 and database software in the industrial computer 7; the PLC control device is connected to the industrial ...

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Abstract

The invention discloses a step-by-step approximation sub-pixel image positioning method and system, comprising the following steps of obtaining initial image information, extracting the edge contour by using a BLOB analysis and morphological edge method, extracting the edge transition band by morphology expansion, edge shearing, Canny algorithm, a polygon approximation method, collinear joint algorithm, least square method linear fitting, image contour intersection point acquisition and image contour center point acquisition. Accurate positioning of the images is finally obtained. Compared with a traditional mode, the invention has the advantages of being high in positioning precision, small in error and strong in anti-interference capability.

Description

technical field [0001] The invention belongs to the field of image detection and positioning, and relates to a method and system for gradually approaching sub-pixel image positioning. Background technique [0002] Accurately determining the position of a digital image is very important for image measurement. At the same time, the image acquisition process is affected by various noises. The traditional extraction methods have limited precision and are easily affected by parameters, which will inevitably cause image blur. Therefore, the research on image positioning technology has always been a hot topic. Regarding the location of points and lines in the image, people have studied and proposed a variety of location methods, and each method has its specific application conditions and accuracy requirements. The sub-pixel positioning algorithm is relatively mature and its classification is becoming increasingly clear. It can be roughly divided into the following three categories...

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Application Information

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IPC IPC(8): G06T7/70G06T7/13G06T5/30G06T7/12G06T5/00
CPCG06T7/70G06T5/002G06T5/30G06T7/12G06T7/13
Inventor 李波邓中文徐凯张萌
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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