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Water gauge image analysis method

A technology of image analysis and water gauge, applied to instruments, character and pattern recognition, computer components, etc., can solve the problems of poor timeliness, high cost, and difficulty in ensuring the personal safety of staff, so as to improve efficiency and utilize dock resources , Time-saving and smoother effect of measurement operation

Inactive Publication Date: 2015-12-16
ZHEJIANG OCEAN UNIV
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Problems solved by technology

This method not only has poor timeliness and high cost, but also it is difficult to guarantee the personal safety of the staff.

Method used

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  • Water gauge image analysis method

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Embodiment Construction

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0027] The embodiment of the present invention provides a water gauge image analysis method, such as figure 1 , the method includes:

[0028] 101. Perform channel binarization processing on the HIS color space of the collected water gauge image of the draft of the ship, and perform threshold processing on the binarized water gauge image to extract the position of the waterline.

[0029] The step 101 in the embodiment of the present invention can be specifically implemented as extracting the current water gauge image in the water gauge video image through a screenshot, and performing channel binarization processing on the HIS color space of the water gauge image, that is, the pixels on the image The gray value of th...

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Abstract

The invention relates to a water gauge image analysis method, relates to the technical field of water gauge measurement, and solves a problem that the value of ship draught is difficult to measure precisely through naked eyes under severe weather conditions. The method comprises the steps: carrying out the channel binarization processing of an HIS color space of a collected water gauge image of ship draught, carrying out the thresholding processing of the water gauge image after binarization processing, and extracting the position of a waterline; obtaining the position of a lower edge of a first scale character above the waterline through employing a method of row-by-row binarization, and calculating the distance from the waterline to the lower edge of the first scale character; recognizing the first scale character above the waterline; and calculating the ship draught value according to the distance from the waterline to the lower edge of the first scale character and the recognized first scale character. The method can analyze the ship draught value conveniently, quickly and effectively under the severe weather conditions.

Description

technical field [0001] The invention relates to the technical field of water gauge measurement, in particular to a water gauge image analysis method and system. Background technique [0002] In recent years, with the continuous development of shoreline resources in Zhoushan Port and the increasing dependence of domestic resource-based bulk bulk cargo on foreign countries, the import volume of bulk cargo has increased sharply. In 2011, 127 batches of iron ore were imported, totaling 4.51 million tons, with a value of USD 605.29 million; 157 batches of soybeans, totaling 2.45 million tons, with a value of USD 1,128.66 million; 79 batches of coal, totaling 5.45 million tons, with a value of USD 605.29 million. $580.73 million. In the context of the sharp rise in international raw material prices, the identification of entry-exit inspection and quarantine water gauges is also facing a trend of complexity and refinement. The most critical factor affecting measurement accuracy i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/32
CPCG06V20/10G06V20/63
Inventor 李博沈益骏王琦
Owner ZHEJIANG OCEAN UNIV
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