Portable ship water gauge automatic detection and identification method based on machine vision

A machine vision and automatic detection technology, applied in the field of image processing, can solve the problems of small observation point range, high cost, hidden errors, etc., and achieve the effect of satisfying portability

Inactive Publication Date: 2013-03-20
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

However, visually measuring the size of the ship's waterline has many disadvantages: the range of observation points is small and few, and statistical principles cannot be used to process the data; the observed data cannot be checked and corrected afterwards due to lack of detailed records, which may There are hidden major errors; it is greatly affected by the ability and status of personnel, the measurement time is long, and the cost is high; it is greatly affected by the weather e

Method used

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  • Portable ship water gauge automatic detection and identification method based on machine vision
  • Portable ship water gauge automatic detection and identification method based on machine vision
  • Portable ship water gauge automatic detection and identification method based on machine vision

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Embodiment Construction

[0052] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with illustrations and specific embodiments.

[0053] System processing flow such as figure 1 Shown:

[0054] After the system acquires the data, it first performs image preprocessing, and uses methods such as contrast enhancement and image filtering to solve the problem of image quality degradation caused by water gauge data acquisition in harsh environments, poor image shooting positions, and mottled ship water gauge itself. Preliminary detection of the image is carried out by methods such as color space transformation, edge detection, and template matching. If the waterline of the ship or the scale of the water scale of the ship is not detected in the image, it returns to process the next frame of video image; if it is detected, the bounding box is used methods such as s...

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Abstract

The invention provides a portable ship water gauge automatic detection and identification method based on machine vision. Video data of a ship water gauge in the overwater environment are used as a main research object, the machine vision and the image processing theory are used as main means, so as to detect and identify the scale of the ship water gauge and perform statistical analysis on detection results of continuous video frames, and finally, a ship draft value is obtained. According to the system, the relatively objective ship draft value can be obtained in accordance with image data, the detection results are visually displayed, the workload of ship draft detection personnel can be reduced, the measurement stability and accuracy of the ship water gauge are increased, and an objective measuring means and reference data are provided for determining ship draft.

Description

technical field [0001] The invention relates to image processing technology, in particular to a machine vision-based automatic detection and recognition method for a portable water gauge of a ship. Background technique [0002] As a means of transportation, ships play an important role in the transportation industry. The ship's draft gauge is widely used at home and abroad to measure the weight of large and cheap bulk cargoes transported by ships. At the same time, it is one of the important methods for the weight identification of import and export commodities, and it is also the main task of the national entry-exit inspection and quarantine department and foreign shipping agency companies. One, the basis of ship load calculation is the measurement of ship draft. The accuracy of ship draft measurement determines the accuracy of ship cargo calculation. At the same time, the weighing results can be used as the basis for commercial disputes, such as the transfer and settleme...

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Application Information

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IPC IPC(8): B63B39/12
Inventor 冉鑫施朝健
Owner SHANGHAI MARITIME UNIVERSITY
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