KR20230089869A - Device and method for measuring draft using image processing technology and computer-readable recording medium including the same - Google Patents

Abstract

A draft measurement device using image processing technology according to an embodiment of the present invention includes an image sensor for generating a draft mark image of a ship by photographing a draft mark including numbers displayed on the outside of a side of a ship, and a ship A water surface line adding device for generating a surface draft image by adding a water surface line corresponding to the surface of the draft mark image, an image preprocessing device for preprocessing the water surface draft image to which the water surface line is added, and the number of draft marks in the preprocessed image A labeling device for generating a labeling image by labeling a region space between and a number with a number, and a draft calculation device for generating a judgment basic image including labeled numbers and a sleep line and calculating a draft from the judgment basic image Includes an included image processing device.

Description

Draft measuring device and method using image processing technology, and a computer readable recording medium on which a computer program for executing the method is recorded on a computer SAME}

The present invention relates to a draft measuring device and method using image processing technology, and a computer readable recording medium on which a computer program for executing the method is recorded on a computer, and in detail, there is no risk of stenosis or drowning, It relates to a draft measuring device and method using image processing technology that can accurately measure regardless of the skill level of a measurer, and a computer readable recording medium on which a computer program for executing the method is recorded on a computer.

In general, ships perform inclining measurement and deadweight measurement at the launching stage after construction. The inclination test is performed for the purpose of identifying the center of gravity and light weight of a built ship. At this time, the center of gravity means the center of gravity in the longitudinal direction, the center of gravity in the width direction, and the center of gravity in the height direction of the ship.

Various data related to the stability of the hull are created through the light weight calculated through the inclination test, the center of gravity in the longitudinal direction, the center of gravity in the width direction, and the center of gravity in the height direction of the ship, which is the basis for loading cargo during loading. Because of this, it is the most important issue in merchant ships.

There are various methods for performing the inclination test, but in general, the dead weight can be obtained by subtracting the light weight of the ship from the draft measurement at the quay wall.

1 illustrates a conventional draft measurement method. 1 (a) to 1 (c), the draft measurement of the ship is performed by using a draft gauge after approaching the ship using a work ship or boarding box, such There is a problem that the risk of being caught or drowning always exists for workers when performing work.

In addition, when there is a mid-inclination test, the draft measurement must be measured in mm, but it is difficult to accurately measure when there is a swell or the weather is not good, and there is a disadvantage in that the degree of measurement value varies depending on the skill of the measurer.

Korean Patent Publication No. 10-2013-0068305 (draft measuring device, 2013.6.26.)

A technical problem to be solved by the present invention is to provide a draft measuring device using image processing technology that is free from the risk of stenosis or drowning and can accurately measure regardless of the skill level of a measurer.

Another technical problem to be solved by the present invention is to provide a draft measurement method using image processing technology that is free from the risk of stenosis or drowning and can accurately measure regardless of the skill level of the measurer.

A draft measuring device using an image processing technology according to an embodiment of the present invention for achieving the above technical problem captures a draft mark including numbers displayed on the outside of a side of a ship, and obtains a draft mark image of the ship. image sensor to generate; and a water line adding device for generating a water surface draft image by adding a water line corresponding to the water surface to the draft mark image of the ship, and an image pre-processing device for pre-processing the water surface draft image to which the water line is added; A labeling device for generating a labeling image by labeling an image with numbers in the area space between the numbers of the draft marks and the numbers, and generating a judgment basic image including the labeled numbers and the sleep line to generate the judgment basic and an image processing device including a draft calculator that calculates a draft from an image.

In addition, the image sensor may include any one or more of a camera, CCTV, or a portable terminal.

In addition, the image pre-processing device may remove the surface of the ship and the sea except for the water line as noise.

In addition, the labeling device forms a first labeling image by assigning a first label to a number region of the draft mark in the preprocessed image, and forms a first labeling image with a number of the draft mark and a region space between the numbers. A second labeling image may be formed by further assigning a second labeling to .

In addition, the labeling device recognizes a number region of the draft mark in the preprocessed image, recognizes an image of the corresponding number, and assigns the first labeling as a mark of a first predetermined size to obtain the first labeling image. forming, recognizing the area space between numbers displayed in the first labeling image, and displaying an image of a number corresponding to an intermediate value that can be filled in between the number and the number as a mark of a second predetermined size in the area space; A second labeling may be further applied to form the second labeling image.

Also, the first predetermined size and the second predetermined size may be the same.

In addition, the labeling device may recognize the number area of the draft mark, image recognition of the corresponding number, recognize the area space between the number and the number, and fill in between the corresponding number and the number through machine learning and image processing. You can perform numerical calculations corresponding to intermediate values in

In addition, the draft calculator uses a ratio of numbers between the first labeling adjacent to the water surface line and the second labeling adjacent to the first labeling based on the standard size of the draft mark. Calculate the draft, or calculate the draft by using the ratio of numbers between the second labeling adjacent to the water surface line and the first labeling adjacent to the second labeling based on the standard size of the draft mark. can be computed.

In addition, the draft measuring device using the image processing technology according to another embodiment of the present invention for achieving the above technical problem captures a draft mark including numbers displayed on the outside of the side of the ship, and the draft mark of the ship An image sensor that generates an image; and adding a water surface line corresponding to the surface of the water to the draft mark image of the ship, performing pre-processing on the image to which the water surface line is added, generating a label on the pre-processed image, and determining the image on which the labeling is generated. and an image processing device for calculating a draft.

In addition, a draft measurement method using image processing technology according to another embodiment of the present invention for achieving the above technical problem is to photograph a draft mark including numbers displayed on the outside of the side of a ship by an image sensor. By doing so, generating a draft mark image of the ship; generating a draft image of the water surface by adding a water line corresponding to the water surface to the draft mark image of the ship by a water surface line adding device; pre-processing the draft image of the water surface to which the water surface line is added, by an image pre-processing device; generating a labeling image by labeling the preprocessed image with a number in a region space between the number of the draft mark and the number in the preprocessed image by a labeling device; and generating, by an image processing device, a judgment basic image including the labeled number and the sleep line, and calculating a draft from the judgment basic image.

In addition, the image sensor may include any one or more of a camera, CCTV, or a portable terminal.

The preprocessing of the surface draft image may include removing the surface of the ship and the sea except for the surface line as noise.

In addition, the generating of the labeling image may include forming a first labeling image by assigning a first label to an area of the number of the draft mark in the preprocessed image, and forming a first labeling image, and the number of the draft mark in the first labeling image. and forming a second labeling image by further assigning a second labeling to a region space between ? and digits.

In addition, the forming of the first labeling image may include recognizing a number region of the draft mark in the preprocessed image, recognizing an image of a corresponding number, and assigning the first labeling as a mark having a first predetermined size. The forming of the first labeling image and the forming of the second labeling image corresponds to an intermediate value that can be filled in between numbers and numbers displayed in the first labeling image by recognizing an area space between the numbers. The second labeling image may be formed by further assigning the second labeling to an image of a number corresponding to a predetermined size as a mark having a second predetermined size in the area space.

Also, the first predetermined size and the second predetermined size may be the same.

In addition, in the forming of the first labeling, through machine learning and image processing, recognition of the number area of the draft mark and image recognition of the corresponding number are performed, and the forming of the second labeling comprises: Through machine learning and image processing, it is possible to recognize the area space between the numbers and calculate the number corresponding to the intermediate value that can be filled in between the corresponding number and the number.

In addition, calculating the draft may include using a ratio of numbers between the first labeling adjacent to the water surface line and the second labeling adjacent to the first labeling based on the standard size of the draft mark. The draft is computed, or the draft is calculated using the ratio of numbers between the second labeling adjacent to the water surface line and the first labeling adjacent to the second labeling based on the standard size of the draft mark. can be computed.

On the other hand, in the computer readable recording medium according to another embodiment of the present invention for achieving the above technical problem, a computer program for executing the draft measurement method using the above-described image processing technology in a computer is recorded.

As described above, the draft measuring device and method using the image processing technology according to the present invention, and the computer readable recording medium on which the computer program for executing the method is recorded on a computer have no risk of stenosis or drowning, It has the advantage of being able to accurately measure regardless of the skill level of the measurer.

1 illustrates a conventional draft measurement method.
2 is a block diagram of a draft measuring device using image processing technology according to an embodiment of the present invention.
3 is a flowchart of a draft measurement method using image processing technology according to an embodiment of the present invention.
4 is a diagram illustrating a process of acquiring a draft image of a ship using an image sensor in a draft measurement method using image processing technology according to an embodiment of the present invention.
5 is a diagram illustrating a process of processing a draft image of a ship in a draft measurement method using an image processing technology according to an embodiment of the present invention.
6 shows the standard size of draft marks including numbers actually displayed on ships.

In order to fully understand the present invention and the advantages in operation of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings describing exemplary embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements.

A draft measurement device using image processing technology according to an embodiment of the present invention includes an image sensor 210 that generates a draft mark image of a ship by photographing a draft mark including numbers displayed on the outside of a side of a ship , And a water line adding device 221 for generating a draft image by adding a water line corresponding to the surface of the water to a draft mark image of a ship, and an image pre-processing device 222 for pre-processing the draft image of the water surface to which the water line is added. , A labeling device 223 for generating a labeling image by labeling the preprocessed image with a number in the area space between the number of the draft mark and the number, and generating a judgment basic image including the labeled number and the sleep line, Including the image processing device 220 including the draft calculation device 224 that calculates the draft from the judgment basic image, there is no risk of stenosis or drowning, and the gist is to measure accurately regardless of the skill level of the measurer.

2 is a block diagram of a draft measuring device using image processing technology according to an embodiment of the present invention.

Referring to FIG. 2 , the draft measuring device 200 using the image processing technology according to the present invention includes an image sensor 210 and an image processing device 220 .

The image sensor 210 may acquire a draft mark image of the ship by capturing a draft mark including numbers displayed on the outside of the side of the ship. Here, the image sensor may be a camera, but is not limited thereto, and includes all means capable of capturing and acquiring images. At this time, the image sensor is preferably installed on the quay wall (for example, CCTV), but is not limited thereto. It is also possible, and images can be obtained remotely with an image sensor mounted on an unmanned aerial vehicle or an unmanned work boat.

The image processing device 220 is a device for calculating the draft of a ship using the draft mark image obtained from the image sensor 210, and generates a draft image of the water surface by adding a water line corresponding to the surface of the water to the draft mark image. A line adding device 221, an image pre-processing device 222 pre-processing the draft image of the water surface to which the water surface lines are added, and labeling the pre-processed image in the draft mark number area and the area between the numbers to generate a labeling image. It may include a labeling device 223 for generating a labeling device 223, and a draft calculation device 224 for generating a judgment basic image including labeled numbers and sleep lines and calculating a draft from the judgment basic image.

The configuration and role of the above apparatus will be described in detail through a draft measurement method using image processing technology according to an embodiment of the present invention.

3 is a flowchart of a draft measurement method using image processing technology according to an embodiment of the present invention.

Referring to FIG. 3, the draft measuring method 300 using image processing technology according to the present invention captures a draft mark including numbers displayed on the outside of the side of the ship using an image sensor to obtain a draft image of the ship. Obtaining (310), generating a draft draft image by adding a water surface line corresponding to the surface of the water to the draft image (320), pre-processing the draft image of the water surface to which the water line is added (330), pre-processing Generating a first labeling image by assigning a first label to the number region of the draft mark to the image (340), and further assigning a second label to the region between the number and the number in the first labeling image to obtain a second labeling image. Generating (350), generating a judgment base image including first and second labeled numbers and sleep lines and calculating draft (360).

First, the step 310 of acquiring a draft image of a ship using an image sensor may be performed by the image sensor 210 . Referring to FIG. 4, the draft image of the ship is captured using the image sensor 210 installed on the quay wall on the outside of the side of the ship (see FIG. 5A) where a draft mark including numbers displayed on the outside of the side of the ship is displayed. can be obtained (see Fig. 5b).

In this embodiment, the image sensor 210 installed on the quay wall is exemplified, but is not limited thereto. Images can be acquired remotely with an image sensor attached to an air vehicle or an unmanned work boat.

Next, referring to FIG. 5C, generating a draft image of the water surface by adding a water surface line corresponding to the water surface to the draft image of the ship (320) may be performed by the water surface line adding device 221, and the draft of the ship It is possible to create a water surface draft image by adding a water surface (water surface) line on the side of the ship to the image.

Here, dividing the water surface in the draft image of the ship and adding the water surface line is a technique known in the field of image signal processing, so details of the related technology will be omitted.

Next, referring to FIG. 5D, the image pre-processing step 330 of pre-processing the draft image of the water surface to which the water line is added can be performed by the image pre-processing device 222, and the surface of the ship or seawater other than the water line Since it corresponds to noise in the draft operation, preprocessing to remove it can be performed.

Next, the step 340 of generating a first labeling image by assigning a first label to the number region of the draft mark to the preprocessed image may be performed by the labeling device 223, and the draft mark displayed on the preprocessed image A first labeling image may be generated by recognizing a number area and recognizing an image of a number and assigning a first label as a mark of a predetermined size.

Referring to FIG. 5E, first labeling is performed as a mark of a predetermined size by recognizing the number area of the draft mark, such as '2' and '8', and recognizing the image of the number as '2' and '8', respectively. ('2', '8') may be assigned to generate the first labeling image.

According to an embodiment, an image of a number of a draft mark may be trained in advance to derive a number area through machine learning (image processing), and the corresponding number may be recognized.

At this time, generating the first labeling image may be configured so that the image of the number of draft marks may be uncertain and the size of the number may not be unified with only the preprocessed image. More accurate draft calculation may be possible through the accurate number of draft marks.

Next, the step 350 of generating a second labeling image in which a second labeling is further assigned to a number and a region between the number in the first labeling image may be performed by the labeling device 223, and the first labeled image By recognizing the area space between the numbers displayed on the image, a number that can fill in between the numbers as a mark of a predetermined size (for example, '8' between '6' and '8') is used as the second labeling. to generate a second labeling image.

Referring to FIG. 5E, a region between '2M' and '8', which is the first labeling, is recognized, and a '9' that can fill in between '2M' and '8' is recognized, and the second labeling is performed as a mark of a predetermined size. A second labeling image may be generated by assigning '9'.

According to an embodiment, the size of the first labeling and the size of the second labeling may be the same.

According to one embodiment, the display number of the first labeling and the second labeling is set so that the sum of the numbers of the first labeling and the second labeling based on the sleep line satisfies a predetermined number (eg, 3 to 5). can

Next, referring to FIG. 5E , the step 360 of calculating a draft by generating a judgment base image including first and second labeled numbers and sleep lines (360) may be performed by the draft calculation unit 224. In addition, a draft may be calculated by using an image including numbers and sleep lines generated in the previous step 350 with second labeling (including first labeling) as a judgment base image.

Hereinafter, a method of calculating a draft using a judgment base image will be described in detail with reference to FIG. 6 .

6 shows the standard size of draft marks including numbers actually displayed on ships.

Referring to FIG. 6, the horizontal length of the draft mark including numbers is set to 80 mm and the vertical length is set to 100 mm, and the length of one pixel can be calculated by dividing each length by the number of pixels.

Referring to the predetermined size of the draft mark, the vertical length (yellow arrow) of the first labeled number '8' in FIG. 5E may also be 100 mm, based on this, in the second labeled number '7' The vertical length (white arrow) located at the top can be calculated.

Specifically, when it is assumed that 100 mm is composed of 20 pixels and the white arrow includes 12 pixels, it can be obtained that the length of the white arrow is 60 mm through the following equation.

100:20 pixels (yellow arrow) = (white arrow height):12 pixels (white arrow)

Therefore, the vertical length of the white arrow is 60, and the unit at this time is mm (millimeter).

Through this, when calculating the draft, it can be seen that 1.7 - 0.06 = 1.64, and the unit at this time is M (meter).

In summary, the step of calculating the draft by the draft calculation unit 224 (360) is based on the standard size of the draft mark, the first labeling adjacent to the water line, and the first labeling adjacent to and located above the first labeling. The draft may be calculated using the ratio of the number to the second labeling, more precisely, the ratio of the vertical length of the number. Conversely, when the labeling adjacent to the sleep line is the second labeling, the draft can be calculated using the ratio of the vertical lengths of the numbers to the first labeling located above and adjacent to the second labeling.

Meanwhile, the present invention can be implemented as a computer readable code on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. there is

In the above, the technical idea of the present invention has been described together with the accompanying drawings, but this is an illustrative example of a preferred embodiment of the present invention, but does not limit the present invention. In addition, it is obvious that anyone skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

210: image sensor 220: image processing device
221: sleep line addition device 222: image pre-processing device
223: labeling device 224: draft calculation device

Claims (18)

An image sensor for generating a draft mark image of the ship by photographing a draft mark including numbers displayed on the outside of the side of the ship; and
A water line adding device for generating a water draft image by adding a water surface line corresponding to the water surface to the draft mark image of the ship, an image preprocessing device for preprocessing the water surface draft image to which the water line is added, and a labeling device for generating a labeling image by labeling the area space between the numbers of the draft mark with numbers, and generating a judgment basic image including the labeled numbers and the sleep line to generate the judgment basic image An image processing device including a draft calculation device that calculates a draft from
Draft measuring device using image processing technology. According to claim 1,
The image sensor,
Including any one or more of cameras, CCTVs or portable terminals,
Draft measuring device using image processing technology. According to claim 1,
The image pre-processing device,
Removing the surface of the ship and the sea except for the water line as noise,
Draft measuring device using image processing technology. According to claim 1,
The labeling device,
Forming a first labeling image by assigning a first label to a number region of the draft mark to the preprocessed image;
Forming a second labeling image by further assigning a second labeling to a region space between numbers of the draft marks to the first labeling image;
Draft measuring device using image processing technology. According to claim 4,
The labeling device,
Recognizing a number area of the draft mark in the preprocessed image, recognizing an image of the corresponding number, and assigning the first labeling as a mark of a first predetermined size to form the first labeling image;
Numbers displayed in the first labeling image and region spaces between the numbers are recognized, and an image of a number corresponding to an intermediate value that can be filled in between the corresponding numbers is displayed as a mark of a second predetermined size in the region space, and the second labeling Further adding to form the second labeling image,
Draft measuring device using image processing technology. According to claim 5,
The first predetermined size and the second predetermined size are the same,
Draft measuring device using image processing technology. According to claim 5,
The labeling device,
Through machine learning and image processing, recognition of the number area of the draft mark, image recognition of the corresponding number, recognition of the area space between the number and the number, and a number corresponding to an intermediate value that can be filled in between the corresponding number and the number performing calculations,
Draft measuring device using image processing technology. According to claim 5,
The draft calculator,
Based on the standard size of the draft mark, the draft is calculated using a ratio of numbers between the first labeling adjacent to the water surface line and the second labeling adjacent to the first labeling, or
Based on the standard size of the draft mark, calculating the draft using a ratio of numbers between the second labeling adjacent to the water surface line and the first labeling adjacent to the second labeling,
Draft measuring device using image processing technology. An image sensor for generating a draft mark image of the ship by photographing a draft mark including numbers displayed on the outside of the side of the ship; and
Adding a water line corresponding to the water surface to the draft mark image of the ship,
An image processing device that performs pre-processing on the image to which the sleep line is added, generates a label on the pre-processed image, and calculates a draft using the image to which the labeling is generated as a judgment base image.
Draft measuring device using image processing technology. generating a draft mark image of the ship by photographing a draft mark including numbers displayed on the outside of the side of the ship by an image sensor;
generating a draft image of the water surface by adding a water line corresponding to the water surface to the draft mark image of the ship by a water surface line adding device;
pre-processing the draft image of the water surface to which the water surface line is added, by an image pre-processing device;
generating a labeling image by labeling the preprocessed image with a number in a region space between the number of the draft mark and the number in the preprocessed image by a labeling device; and
Generating, by an image processing device, a judgment basic image including the labeled number and the sleep line and calculating a draft from the judgment basic image;
Draft measurement method using image processing technology. According to claim 10,
The image sensor,
Including any one or more of cameras, CCTVs or portable terminals,
Draft measurement method using image processing technology. According to claim 10,
The step of preprocessing the draft image of the water surface,
Including the step of removing the surface of the ship and the sea except for the water line as noise,
Draft measurement method using image processing technology. According to claim 10,
Generating the labeling image,
forming a first labeling image by assigning a first label to the number area of the draft mark to the preprocessed image; and
Forming a second labeling image by further assigning a second labeling to a region space between numbers of the draft marks to the first labeling image,
Draft measurement method using image processing technology. According to claim 13,
Forming the first labeling image,
Recognizing a number area of the draft mark in the preprocessed image, recognizing an image of the corresponding number, and assigning the first labeling as a mark of a first predetermined size to form the first labeling image;
Forming the second labeling image,
Numbers displayed in the first labeling image and region spaces between the numbers are recognized, and an image of a number corresponding to an intermediate value that can be filled in between the corresponding numbers is displayed as a mark of a second predetermined size in the region space, and the second labeling Further adding to form the second labeling image,
Draft measurement method using image processing technology. 15. The method of claim 14,
The first predetermined size and the second predetermined size are the same
Draft measurement method using image processing technology. 15. The method of claim 14,
Forming the first labeling,
Through machine learning and image processing, performing digit area recognition of the draft mark and image recognition for the digit;
Forming the second labeling,
Recognizing the area space between the numbers and numbers through the machine learning and image processing, and calculating a number corresponding to an intermediate value that can be filled between the corresponding number and the number,
Draft measurement method using image processing technology. 15. The method of claim 14,
The step of calculating the draft is,
Based on the standard size of the draft mark, the draft is calculated using a ratio of numbers between the first labeling adjacent to the water surface line and the second labeling adjacent to the first labeling, or
Based on the standard size of the draft mark, calculating the draft using a ratio of numbers between the second labeling adjacent to the water surface line and the first labeling adjacent to the second labeling,
Draft measurement method using image processing technology. A computer readable recording medium on which a computer program for executing the draft measurement method using the image processing technology according to any one of claims 10 to 17 is recorded on a computer.

Images