KR101111434B1 - Surveying System Using a measuring rule - Google Patents

Abstract

The present invention relates to a measuring system and a method for accurately calculating the amount of snowfall, rainfall, etc. information in real time in real time, in particular the present invention transmits the external image of the location where the actual measurement unit is located from the image input device to the analysis terminal The first step and the second step of extracting the virtual surveyor from the external image and displaying it on the analysis terminal, and the third step of calculating the actual survey value by calculating the height of the virtual surveyor. Allows you to implement the method.
According to the present invention, it is possible to implement and calculate a virtual surveyor through image analysis so that real measurements of environmental changes such as snowfall or rainfall at a remote location can be analyzed in real time through image analysis of the measurement target. It is effective to secure the actual information with reliability by the automated system.

Description

Surveying Method Using Virtual Surveyor and Surveying System Using Virtual Surveyor {Surveying System Using a measuring rule}

The present invention relates to a measurement system and method for accurately calculating the amount of snowfall, rainfall and the like in remote locations in real time.

In recent years, national heavy snowfall and the surprise southern snowfall have caused enormous national losses. However, no immediate snowfall or snowfall warnings were made and no immediate and accurate snowfall measurements were performed in each region, so limited snow removal equipment was not efficiently carried out. Therefore, the necessity of snow measurement and management has been increased as part of effective weather observation for preventing such weather disasters and managing water resources.

In general, in order to measure snowfall accumulated in the winter and snow strength, which is the degree of snowfall per unit time, the measurement method by the naked eye using a snow gauge has been used.

However, although it is essential to accurately measure weather-related data such as snow in the mountainous regions in order to make more accurate observations and predictions of weather, there was no means to accurately measure it at every moment. Because of the inconvenience, it was difficult to observe and accumulate accurate weather data.

In addition, since such accurate weather observation data are not observed and accumulated, there is a limit to increase the accuracy and precision by performing more scientific and statistical weather prediction based on these data.

The general snowfall measuring instrument uses analog and logic circuits, and it is difficult to reliably cope with complex situations by the combination of simple analog and simple logic. In addition, the snow design sensor uses a general ultrasonic sensor or temperature sensor instead of snow observation, and its reliability is deteriorated, and the snow strength is operated only to a certain degree, so it is measured and corrected during heavy snow disaster. There was not enough.

In addition, when using an ultrasonic sensor or a laser, there is a problem that the cost is very high, the reliability of the actual measurement value is greatly reduced during the snow fall in real time.

The present invention has been made to solve the above-described problem, an object of the present invention is to analyze the image to be analyzed in real time through the image analysis of the measurement target site in real time, such as snowfall or rainfall in the remote location The present invention provides a system and method that can provide actual information having high reliability by implementing and calculating a virtual surveyor.

As a means for solving the above problems, the present invention is the first step in which the external image of the location where the actual measuring device is disposed from the image input device is transmitted to the analysis terminal and the virtual surveyor is extracted from the external image and displayed on the analysis terminal. In the second step, and calculating the height of the virtual surveyor to derive the actual measurement value to implement the measurement method using a virtual surveyor is configured.

In addition, as a system for implementing the above-described measurement method, the actual measurement is displayed on the measurement scale disposed on the measurement target; An image input device for photographing an image of a location where the real measurer is arranged and transmitting the image to a remote analysis terminal; And a measurement operator configured to extract and measure a provisional measurer by analyzing the external image transmitted from the image input device, and calculate a real measurement value based on the provisional measurer.

According to the present invention, it is possible to implement and calculate a virtual surveyor through image analysis so that real measurements of environmental changes such as snowfall or rainfall at a remote location can be analyzed in real time through image analysis of the measurement target. There is an effect that can secure the actual information having a reliability by an automated system.

In particular, it is possible to remove the expensive range finder, laser, ultrasonic sensor equipment, and to implement the measurement through the simple image information, which also has the effect of maximizing cost efficiency.

1 is a flow chart illustrating a measurement method using a virtual surveyor according to the present invention.
2 is a system block diagram for implementing the measurement method according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

1 is a block diagram showing a procedure of a measurement method using a virtual surveyor according to the present invention (hereinafter referred to as a 'measurement method'), and FIG. 2 is a block diagram of a measurement system using a virtual surveyor according to the present invention. It is a block diagram.

Referring to the flowchart of FIG. 1 and the system block diagram of FIG. 2, the measurement method according to the present invention includes a first step in which an external image of a location where a real measurer is disposed is transmitted from an image input apparatus to an analysis terminal and the external image. And extracting a virtual surveyor and displaying the same on the analysis terminal, and calculating the actual survey value by calculating a height of the virtual surveyor.

In particular, the present invention is to provide an observation system that changes according to the time through image analysis, such as measuring the amount of snow in a remote place in real time, or measuring rainfall, in this embodiment it is to observe the amount of snow An embodiment will be described.

In the first step, the real measurer 110 is disposed at a measurement target of a remote place, and the image stored in the real measurer 110 can be secured through the image input device 120. In particular, the image input device 120 may be configured to include a visible light camera that can take an external image and a communication module capable of transmitting an image input through the visible light camera. The communication module is a concept including wired and wireless communication. In addition, the actual measuring device is basically formed in the form of a straight bar-shaped general measuring instrument in a vertical form, or a structure in which the measuring scale is displayed, such as a structure in which the scale is marked on a transparent snow container, but real-time snow falls In order to minimize the problem that the measurement scale is not visible depending on the environment, it is preferable to use a material that is hard to see or a coating material.

Thereafter, the image input device 120 transmits the image captured by the visible light camera to the analysis terminal A, and the analysis terminal A receives the image to calculate a virtual surveyor in the measurement operation unit. The earnings snowfall will be calculated by the mediation.

Specifically, the measurement operation unit 200 performing the above process calculates snowfall from an external image, and corrects the distortion image of the camera with respect to the external image received from the analysis terminal A. And a snow measurer forming unit 220 for extracting a virtual snowdropper through an edge extraction process from the image corrected by the distorted image correction unit 210, and a snow measurer formed through the measurer shape unit 220. It may be configured to include a snowfall calculation unit 230 for calculating the.

The distortion image correcting unit 210 corrects the distortion of the straight line due to the curvature of the camera lens for photographing the external image.

The provisional measurer forming unit 220 performs a function of extracting a virtual snow dripper through an edge extraction process from the image corrected by the distortion image correction unit 210, and specifically, the adaptive binarization of the external image ( Hough transform and edge extraction unit 221 extracting edges through an adaptive local threshold process detects all linear information appearing in the image, and fixes theta with 90 degrees of theta among the linear information. The Hough transform unit 222 can be configured to include.

As described above, the provisional measurer forming unit 220 forms a virtual measurer through edge extraction, binarization, and Hough transform. In particular, since the snow snow may not be accurately extracted from the external input image due to the change in illumination, the adaptive local threshold process as described above is used.

Binary = MeanFilter (Gray)-Gray -Constant

In addition, straight line information is extracted through the Hough transform, but since the snowplow is generally vertical, only the candidate having theta of 90 degrees is extracted from the straight line candidates, and the starting and ending points of the extracted straight line are returned.

In particular, in this process, the present invention may be configured to further include a color conversion process for converting the color of the actual measurement to black and white color.

For example, if the snow snowman's color is blue, the following calculation can be made when converting an RGB image to gray:

Gray = (Red * 0.2 + Green * 0.2 + Blue * 0.6) / 3

Thereafter, the snow amount calculating unit 230 derives the snow amount using Equation 1 below.

{1}

sH = H-(h * L) / f

f = Video input camera lens Focal length

L = distance between camera and actual measurement

h = length of actual measurement in the image

H = length of real measurement without eyes

sH = Snowfall

Of course, in this case, since the amount of snowfall calculated due to changes in lighting or the surrounding environment includes an error, the average amount of snowfall is measured for a predetermined time interval (eg, 1 minute) at a predetermined time interval (eg, 1 second). It is more preferable to use as a snowfall amount.

In addition, the present invention may further include a display unit 240 for displaying the provisional measurer formed in the provisional measurer forming unit 220 together with the external image. In this case, when the measurer displayed on the display unit 240 is clicked, the controller may be provided so that the calculated snow amount may be immediately checked.

In addition, in the system according to the present invention, when the actual measurement value derived in step 3 exceeds a preset reference value, the alert information may be automatically transmitted to the registered mail through the management server 300 connected to the analysis terminal. It is preferable to.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined by the claims and equivalents thereof.

110: real measure
120: video input device
A: Analysis terminal
200: measurement operation unit
210: Distorted image correction
220: measureable part forming unit
221: edge extraction unit
222: binarization department
223: Hough transform unit
230: snowfall calculation unit
240: display unit
300: management server

Claims (13)

Photographing an external image using a visible light camera that captures an image of an actual measurer disposed on a measurement target, and transmitting the external image to an analysis terminal of the actual measurer through wired or wireless communication;
The distortion due to the lens curvature of the input external image is corrected, and the edge extraction of the distortion corrected external image is performed, but the adaptive local threshold process is performed on the external image in consideration of the change in illuminance. Performing a Hough Transform on the external image to detect all linear information appearing on the image, and selecting and fixing the information having a theta of 90 degrees from the linear information, Performing a color conversion process of converting a color into a black and white color, extracting a virtual surveyor from the external image and displaying the same on the analysis terminal;
Comprising three steps of deriving the actual survey value by calculating the height of the virtual surveyor;
In step 3, the snow amount is derived using Equation 1 below.
The snow amount is derived from the average value measured during a certain period of time at a predetermined time interval as the actual snow amount,
And when the actual survey value derived in step 3 exceeds a reference value, automatically transmitting warning information to a registered mail through a mail server connected to the analysis terminal.
{Equation 1}
sH = H-(h * L) / f
f = Video input camera lens Focal length
L = distance between camera and actual measurement
h = length of actual measurement in the image
H = length of real measurement without eyes
sH = Snowfall
delete delete delete delete delete delete delete An actual measurer displaying a measurement scale arranged on a measurement target;
An image input device including a visible light camera for photographing an image of a real measurer and a communication unit for transmitting an external image photographed by the camera, and taking an image of a location where the real measurer is disposed and transmitting the image to a remote analysis terminal. ;
The snow quantity is calculated from an external image, and the hypothetical snow maker is subjected to an edge extraction process from the distortion image correction unit correcting the distortion image of the camera with respect to the external image received from the analysis terminal and the image corrected by the distortion image correction unit. Including a snow measurer forming unit for extracting, snowfall calculation unit for calculating the amount of snow through the measurer formed in the measurer forming unit, extracting and forming a measurer by analyzing the external image transmitted from the image input device, It is configured to include; measuring operation unit for calculating the actual measurement value based on the measurer
The temporary measurer forming unit,
An edge extractor for extracting edges through an adaptive localization process for the external image; And a hough transform unit that detects all linear information appearing in the image by performing a hough transform, and selects and fixes information having a theta of 90 degrees from the linear information.
And a display unit configured to display a provisional measurer formed by the provisional measurer forming unit together with the external image, and display the actual snowfall calculated by the snowfall calculation unit in response to an input signal to the provisional measurer. It further comprises a control unit for displaying in parallel,
The measurement system using the virtual surveyor using the following equation (1) to calculate the amount of snow in the measurement calculation unit.
{Equation 1}
sH = H-(h * L) / f
f = Video input camera lens Focal length
L = distance between camera and actual measurement
h = length of actual measurement in the image
H = length of real measurement without eyes
sH = Snowfall delete delete delete delete

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