KR20240033499A - Apparatus for analyzing luminous intensity feature of lantern based on image and method thereof - Google Patents

Abstract

The present invention discloses an image-based light intensity characteristic analysis device and method. That is, the present invention acquires image information including a light source radiating from a lantern and a standard light source, calculates the field-measured luminance value of the lantern and the field-measured luminance value of the standard light source from the acquired image information, respectively, and calculates the calculated luminance value. Calculate the luminance value of the lantern to be analyzed and the luminance value of the standard light source, respectively, based on the field-measured luminance value of the lantern, the calculated luminance value of the field measurement of the standard light source, and the pre-use inspection information of the standard light source. Calculate the corrected luminance luminance value and the corrected luminance luminance value based on the field measured luminance value of the lantern, the calculated luminance value of the lantern, pre-use inspection information of the standard light source, etc., and calculate the calibrated luminance value of the lantern. By providing the luminance value and the corrected luminance value of the lantern, the luminance value of the lantern that is the subject of measurement can be analyzed in real time based on video data captured with a camera, and expensive luminance meter equipment can be replaced. The inconvenience of having to calculate the luminance value can be improved.

Description

Image-based luminous intensity feature analysis device and method thereof {Apparatus for analyzing luminous intensity feature of lantern based on image and method thereof}

The present invention relates to an image-based luminaire luminance characteristic analysis device and method, and in particular to obtain image information including a light source radiating from a luminaire and a standard light source, and to obtain an on-site measurement luminance value of the luminaire from the acquired image information. and calculate the field-measured luminance value of the standard light source, respectively, and analyze the light device based on the calculated field-measured luminance value of the light source, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the standard light source. The luminance value and the luminance value of the standard light source are calculated separately, and the luminance value of the lantern is corrected and corrected based on the calculated luminance value of field measurement of the lantern, the calculated luminance value of the lantern, and the pre-use inspection information of the standard light source. It relates to an image-based lantern luminance characteristic analysis device and method that calculates the lantern luminance value and provides the calculated lantern luminance value and the corrected lantern luminance value.

A light fixture refers to a light that emits light in a lighthouse at sea, and to manage visibility, regular inspections on brightness are conducted every four years in accordance with the equipment and supplies inspection standards of the Ministry of Oceans and Fisheries.

Basically, the concepts of luminance and luminance are different. Luminance represents the degree of brightness per unit area of the light source and is expressed in cd/㎡ units. On the other hand, luminous intensity represents the brightness of an object in a certain direction and is expressed in cd units. Since luminous intensity is a unit that excludes the concept of area, there are practical difficulties in measuring it unless specific environmental conditions are met.

The current method of measuring the luminous intensity of a lantern in an outdoor environment is as follows. A standard light source whose luminance and luminance have been previously measured indoors is installed near the luminaire that is to be measured, the luminance is measured using expensive luminance meter equipment, and the luminance characteristics are analyzed by comparing the relative values of the two light sources. This analysis method requires measuring data and manually converting it into luminance values, making it difficult to provide luminance and luminance information of lanterns in real time.

In addition, this measurement method requires expensive luminance metering equipment, and in situations where continuous measurement is required, it requires a lot of time and effort on the part of the measurer.

Korean Patent No. 10-0866520 [Title: Lighting machine control system]

The purpose of the present invention is to obtain image information including a light source radiating from a lantern and a standard light source, calculate the field-measured luminance value of the lantern and the field-measured luminance value of the standard light source from the acquired image information, respectively, and calculate the calculated luminance value. Calculate the luminance value of the lantern to be analyzed and the luminance value of the standard light source, respectively, based on the field-measured luminance value of the lantern, the calculated luminance value of the field measurement of the standard light source, and the pre-use inspection information of the standard light source. Calculate the corrected luminance luminance value and the corrected luminance luminance value based on the field measured luminance value of the lantern, the calculated luminance value of the lantern, pre-use inspection information of the standard light source, etc., and calculate the calibrated luminance value of the lantern. The object is to provide an image-based luminance luminance characteristic analysis device and method that provides luminance values and corrected luminance luminance values.

An image-based luminaire luminance characteristic analysis device according to an embodiment of the present invention includes a camera unit that acquires image information including a light source emitted from a luminaire and a standard light source unit; And collecting at least one of a setting value of the camera unit at the time of acquiring image information through the camera unit, location information of the camera unit at the time of acquiring image information, and weather information around the light fixture at the time of acquiring the image information, and collecting the obtained By tracking the lantern light source and the standard light source based on the image information, the area of the lantern light source and the area of the standard light source are set respectively, and the lantern site related to the lantern is based on the set area of the lantern light source and the image information. Calculate the measured luminance value, the maximum luminance value of the illuminator, and the minimum luminance value of the illuminator, and based on the area of the standard light source set above and the image information, the on-site measured luminance value of the standard light source, the maximum luminance value of the standard light source, and the standard light source. Calculate the minimum luminance value of the light source, and analyze the luminance value of the light source based on the calculated field-measured luminance value of the light source, the calculated field-measured luminance value of the standard light source, and the pre-use inspection information of the preset standard light source. Calculate the luminance value of the standard light source, respectively, the calculated field-measured luminance value of the light source, the calculated luminance value of the light device, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the standard light source. It may include a control unit that calculates the corrected lantern luminance value and the corrected lantern luminance value, respectively.

As an example related to the present invention, the inspection information before use of the standard light source may include a luminance value measured using the standard light source, a luminance value measured using the standard light source, and a luminance value measured before using the standard light source. there is.

As an example related to the present invention, the area of the set light source, the area of the set standard light source, the inspection luminance value before using the standard light source, the inspection luminance value before using the standard light source, the corrected light luminance value, and the correction. It may further include a display unit that displays the luminance value of the lantern, the calculated field-measured luminance value of the standard light source, and the calculated luminance value of the standard light source.

An image-based method of analyzing luminous intensity characteristics of a light fixture according to an embodiment of the present invention includes the steps of acquiring image information including a light source emitted from a light fixture and a standard light source unit by a camera unit; Collecting, by a control unit, at least one of a setting value of the camera unit at the time of acquiring image information through the camera unit, location information of the camera unit at the time of acquiring image information, and weather information around the light fixture at the time of acquiring the image information. ; Tracking the luminaire light source and the standard light source based on the acquired image information, by the control unit, and setting the area of the luminaire light source and the area of the standard light source, respectively; Calculating, by the control unit, a lantern field-measured luminance value, a lantern maximum luminance value, and a lantern minimum luminance value related to the lantern based on the set area of the lantern light source and the image information; Calculating, by the control unit, a standard light source field-measured luminance value, a standard light source maximum luminance value, and a standard light source minimum luminance value related to the standard light source based on the set area of the standard light source and the image information; By the control unit, the luminance value and the standard light source are to be analyzed based on the calculated field-measured luminance value of the light source, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the preset standard light source. Calculating each luminance value of; The light is corrected by the control unit based on the calculated field-measured luminance value of the light source, the calculated luminance value of the light device, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the standard light source. Calculating the luminance value and the corrected luminance value of the illuminator, respectively; and by the control unit, the set area of the lantern light source, the set area of the standard light source, the inspection luminance value before using the standard light source, the inspection luminance value before using the standard light source, the corrected luminance luminance value, and the corrected luminance value. It may include controlling the display unit to display the luminance value of the lantern, the calculated field-measured luminance value of the standard light source, and the calculated luminance value of the standard light source.

As an example related to the present invention, the step of setting the area of the light source light source and the area of the standard light source, respectively, manages the image information acquired through the camera unit in the form of a video, and within the image information, the light source and the A process of checking the blinking state of the light emitted by the standard light source unit and tracking the luminaire light source and the standard light source within the image information so that the center point area of the light source can be identified at the time the light is visible; A process of setting an area corresponding to a preset radius from the lantern light source on the image information as an area of the lantern light source based on the tracked lantern light source; and setting an area corresponding to the preset radius from the standard light source on the image information as the area of the standard light source based on the tracked standard light source.

As an example related to the present invention, the step of calculating the field-measured luminance value of the lantern, the maximum luminance value of the lantern, and the minimum luminance value of the lantern related to the lantern include the process of converting the RGB value of the image information into tristimulus value XYZ values. ; A process of extracting a scale-corrected value of the Y value corresponding to the area of the light source of the light source from the converted tristimulus value Extracting the maximum luminance value of the illuminator corresponding to a pixel with the maximum luminance value in the area of the set illuminator light source in the image information; And it may include the process of extracting the minimum brightness value of the light source corresponding to a pixel with the minimum brightness value in the area of the set light source light source in the image information.

As an example related to the present invention, the step of calculating the standard light source on-site measurement luminance value, standard light source maximum luminance value, and standard light source minimum luminance value related to the standard light source includes converting the RGB value of the image information into tristimulus value XYZ values. procedure; A process of extracting a scale-corrected value of the Y value corresponding to the area of the standard light source from the converted tristimulus value XYZ value as the luminance value of the standard light source field measurement; extracting the maximum luminance value of the standard light source corresponding to a pixel with the maximum luminance value in the area of the set standard light source within the image information; and extracting the minimum luminance value of the standard light source corresponding to a pixel with the minimum luminance value in the set area of the standard light source within the image information.

, 상기 a는 상기 등명기의 현장측정 휘도값을 나타내고, 상기 b는 등명기의 광도값을 나타내고, 상기 e는 표준광원 사용전 검사 휘도값을 나타내고, 상기 f는 표준광원 사용전 검사 광도값을 나타낼 수 있다.As an example related to the present invention, the step of calculating the luminous intensity value of the lantern is calculating the luminous intensity value of the lantern using the following equation,

, where a represents the field-measured luminance value of the light source, b represents the luminance value of the light source, e represents the luminance value inspected before using a standard light source, and f represents the luminance value inspected before using a standard light source. It can be expressed.

, 상기 c는 상기 표준광원의 현장측정 휘도값을 나타내고, 상기 d는 표준광원의 광도값을 나타내고, 상기 e는 표준광원 사용전 검사 휘도값을 나타내고, 상기 f는 표준광원 사용전 검사 광도값을 나타낼 수 있다.As an example related to the present invention, the step of calculating the luminous intensity value of the standard light source calculates the luminous intensity value of the standard light source using the following equation,

, where c represents the field measured luminance value of the standard light source, d represents the luminance value of the standard light source, e represents the luminance value inspected before using the standard light source, and f represents the luminance value inspected before using the standard light source. It can be expressed.

, 상기 A는 상기 보정된 등명기 휘도값을 나타내고, 상기 B는 보정된 등명기 광도값을 나타내고, 상기 a는 상기 등명기의 현장측정 휘도값을 나타내고, 상기 b는 등명기의 광도값을 나타내고, 상기 c는 상기 표준광원의 현장측정 휘도값을 나타내고, 상기 e는 표준광원 사용전 검사 휘도값을 나타낼 수 있다.As an example related to the present invention, the step of calculating the corrected lantern luminance value and the corrected lantern luminance value, respectively, is to calculate the corrected lantern luminance value and the corrected lantern luminance value using the following equation: Calculate,

, where A represents the corrected luminance value of the lantern, B represents the corrected luminance value of the illuminator, a represents the field measured luminance value of the illuminator, and b represents the luminance value of the illuminator. , where c represents the field measured luminance value of the standard light source, and e may represent the luminance value tested before using the standard light source.

The present invention acquires image information including a light source radiating from a lantern and a standard light source, calculates the field-measured luminance value of the lantern and the field-measured luminance value of the standard light source respectively from the acquired image information, and calculates the field-measured luminance value of the lantern and the standard light source. Calculate the luminance value of the light to be analyzed and the luminance value of the standard light source respectively based on the field-measured luminance value of the standard light source, the calculated field-measured luminance value of the standard light source, and the pre-use inspection information of the standard light source. Calculate the corrected luminance value of the lantern and the corrected luminance value of the lantern based on the field measured luminance value, calculated luminance value of the lantern, pre-use inspection information of the standard light source, etc., and calculate the calculated corrected luminance value of the lantern. By providing the corrected luminance value of the lantern, the luminance value of the lantern that is the subject of measurement can be analyzed in real time based on video data captured with a camera, and expensive luminance meter equipment can be replaced, and the luminance value can be converted to luminance. It has the effect of improving the inconvenience of having to calculate values.

Figure 1 is a block diagram showing the configuration of an image-based light intensity characteristic analysis device according to an embodiment of the present invention.
Figure 2 is a flowchart showing an image-based method of analyzing light intensity characteristics according to an embodiment of the present invention.
3 and 4 are diagrams showing examples of image information according to an embodiment of the present invention.
Figure 5 is a diagram showing an example of a screen according to an embodiment of the present invention.

It should be noted that the technical terms used in the present invention are only used to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention, unless specifically defined in a different sense in the present invention, should be interpreted as meanings generally understood by those skilled in the art to which the present invention pertains, and are not overly comprehensive. It should not be interpreted in a literal or excessively reduced sense. Additionally, if the technical terms used in the present invention are incorrect technical terms that do not accurately express the idea of the present invention, they should be replaced with technical terms that can be correctly understood by those skilled in the art. In addition, general terms used in the present invention should be interpreted according to the definition in the dictionary or the context, and should not be interpreted in an excessively reduced sense.

Additionally, as used in the present invention, singular expressions include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the invention, and some of the components or steps may not be included. It may be possible, or it should be interpreted as being able to further include additional components or steps.

Additionally, terms containing ordinal numbers, such as first, second, etc., used in the present invention may be used to describe constituent elements, but the constituent elements should not be limited by the terms. Terms are used only to distinguish one component from another. For example, a first component may be named a second component without departing from the scope of the present invention, and similarly, the second component may also be named a first component.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of the reference numerals, and duplicate descriptions thereof will be omitted.

Additionally, when describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted. In addition, it should be noted that the attached drawings are only intended to facilitate easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the attached drawings.

Figure 1 is a block diagram showing the configuration of an image-based light intensity characteristic analysis device 100 according to an embodiment of the present invention.

As shown in FIG. 1, the image-based light intensity characteristic analysis device 100 includes a camera unit 110, a communication unit 120, a storage unit 130, a display unit 140, an audio output unit 150, and It consists of a control unit 160. Not all components of the image-based light intensity characteristic analysis device 100 shown in FIG. 1 are essential components, and image-based light intensity characteristic analysis is performed using more components than those shown in FIG. 1. The device 100 may be implemented, or the image-based light intensity characteristic analysis device 100 may be implemented with fewer components.

The light intensity characteristic analysis device 100 is widely used in smart phones, portable terminals, mobile terminals, foldable terminals, and personal digital assistants (PDAs). , PMP (Portable Multimedia Player) terminal, telematics terminal, navigation terminal, personal computer, laptop computer, Slate PC, Tablet PC, ultrabook. , Wearable devices (including, for example, watch-type terminals (Smartwatch), glass-type terminals (Smart Glass), HMD (Head Mounted Display), etc.), Wibro terminals, IPTV (Internet Protocol Television) terminals, It can be applied to various terminals such as smart TVs, digital broadcasting terminals, AVN (Audio Video Navigation) terminals, A/V (Audio/Video) systems, flexible terminals, and digital signage devices.

The camera unit (or photographing unit) 110 is configured in an independent form or on one side of a vehicle, drone, etc.

In addition, the camera unit 110 is composed of one or more image sensors (camera modules or cameras) to capture the front surface, including the front, back, side, bottom, and top of the user (or photographer). At this time, the camera unit 110 may be configured as a stereo camera, a depth camera, etc. capable of obtaining image information in all directions of 360 degrees.

In addition, the camera unit 110 radiates (or emits) light from the luminaire (not shown) and the standard light source unit (not shown) within a preset distance range (for example, 200 m to 300 m). Image information (or video/multiple continuous still images acquired at preset periods or intervals) including a light source is acquired (or photographed). At this time, the lantern and the standard light source may be arranged (or installed/configured) adjacent to each other. Here, the camera unit 110 is configured on one side of a vehicle, drone, etc., and can acquire corresponding image information at a certain height from the water or ground by controlling the vehicle, drone, etc.

In the case of the above luminaire, if exposed outdoors for a long time, foreign substances may stick to the luminaire and affect the luminance value and/or luminance value, and when measuring, a large error may occur due to the influence of surrounding weather and backlight. You can.

Accordingly, by placing (or installing/configuring/forming) the standard light source, the characteristics of which are known through prior inspection, adjacent to the lantern, comparative analysis is possible with values measured in the field and relative values.

In addition, the standard light source unit is composed (or formed) of a standard light source that emits light, a support part that supports the standard light source, etc.

In addition, since the standard light source unit must know the luminance and luminance data of the standard light source in advance, it performs (or performs) an inspection before use. Here, pre-use inspection is advantageous for future error correction because accurate values are measured in an indoor dark room.

In addition, when measuring the light/brightness value of a lantern in the field, it is installed near the lantern so that it can be captured on one screen when photographed by the camera unit 110.

That is, the one or more camera units 110 process image frames such as still images or moving images obtained by an image sensor (camera module or camera) in video call mode, shooting mode, video conference mode, etc. That is, the image data obtained by the image sensor is encoded/decoded according to the codec (CODEC) to meet each standard. As an example, the camera unit 110 photographs an object (or subject) and outputs a video signal corresponding to the captured image (subject image).

In addition, image frames (or image information) processed by the camera unit 110 are stored in a digital video recorder (DVR), stored in the storage unit 130, or sent through the communication unit 120. It can be transmitted to an external server, etc.

Additionally, the camera unit 110 acquires (or captures) an image (or image information) displayed in a preview item (or viewfinder item).

The communication unit 120 communicates with any internal component or at least one external terminal through a wired/wireless communication network. At this time, the external arbitrary terminal may include a server (not shown), a terminal (not shown), etc. Here, wireless Internet technologies include Wireless LAN (WLAN), DLNA (Digital Living Network Alliance), Wibro (Wireless Broadband: Wibro), Wimax (World Interoperability for Microwave Access: Wimax), and HSDPA (High Speed Downlink Packet Access). ), HSUPA (High Speed Uplink Packet Access), IEEE 802.16, Long Term Evolution (LTE), LTE-A (Long Term Evolution-Advanced), Wireless Mobile Broadband Service (WMBS), etc. The communication unit 120 transmits and receives data according to at least one wireless Internet technology, including Internet technologies not listed above. In addition, short-range communication technologies include Bluetooth, RFID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, and Near Field Communication (NFC). , Ultrasound Communication (USC), Visible Light Communication (VLC), Wi-Fi, Wi-Fi Direct, etc. may be included. Additionally, wired communication technologies may include Power Line Communication (PLC), USB communication, Ethernet, serial communication, optical/coaxial cables, etc.

Additionally, the communication unit 120 can transmit information to and from any terminal through a universal serial bus (USB).

In addition, the communication unit 120 supports technical standards or communication methods for mobile communication (e.g., Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (CDMA2000), EV -DO (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), WCDMA (Wideband CDMA), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A Wireless signals are transmitted and received with a base station, the server, the terminal, etc. on a mobile communication network built according to (Long Term Evolution-Advanced), etc.).

In addition, the communication unit 120, under the control of the control unit 160, sends image information including the light source emitted from the corresponding luminaire and standard light source unit obtained through the camera unit 110 to the server and the terminal. Send it to etc.

The storage unit 130 stores various user interfaces (UIs), graphic user interfaces (GUIs), etc.

In addition, the storage unit 130 stores data and programs necessary for the operation of the light intensity characteristic analysis device 100.

That is, the storage unit 130 contains a plurality of application programs (application programs or applications) running on the lantern luminance characteristic analysis device 100, and data for the operation of the lantern luminance characteristic analysis device 100. , you can save commands. At least some of these applications may be downloaded from an external server via wireless communication. In addition, at least some of these application programs may exist on the lantern luminance characteristic analysis device 100 from the time of shipment for the basic functions of the lantern luminance characteristic analysis device 100. Meanwhile, the application program is stored in the storage unit 130, installed in the lantern luminance characteristic analysis device 100, and controls the operation (or function) of the lantern luminance characteristic analysis device 100 by the control unit 160. It can be driven to perform.

In addition, the storage unit 130 is a flash memory type, hard disk type, multimedia card micro type, and card type memory (for example, SD or XD). memory, etc.), magnetic memory, magnetic disk, optical disk, RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read-Only Memory: ROM), EEPROM (Electrically Erasable Programmable Read-Only Memory), It may include at least one storage medium of PROM (Programmable Read-Only Memory). In addition, the apparatus 100 for analyzing light intensity characteristics may operate web storage that performs the storage function of the storage unit 130 on the Internet, or may operate in relation to the web storage.

In addition, the storage unit 130 stores image information including light sources emitted from the corresponding luminaire and standard light source unit acquired through the camera unit 110 under the control of the control unit 160.

The display unit (or display unit) 140 can display various contents, such as various menu screens, using the user interface and/or graphic user interface stored in the storage unit 130 under the control of the control unit 160. there is. Here, the content displayed on the display unit 140 includes various text or image data (including various information data) and a menu screen including data such as icons, list menus, and combo boxes. Additionally, the display unit 140 may be a touch screen.

In addition, the display unit 140 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), or a flexible display. It may include at least one of a flexible display, 3D display, e-ink display, LED (Light Emitting Diode), beam projector, goggle-type VR, and hologram.

Additionally, the display unit 140 displays image information acquired by the camera unit 110 through the viewfinder screen under the control of the control unit 160.

In addition, the display unit 140 displays image information including the light source emitted from the corresponding luminaire and standard light source unit acquired through the camera unit 110 under the control of the control unit 160.

The audio output unit 150 outputs audio information included in a signal processed by the control unit 160. Here, the audio output unit 150 may include a receiver, speaker, buzzer, etc.

Additionally, the voice output unit 150 outputs a guidance voice generated by the control unit 160.

In addition, the audio output unit 150 provides audio information corresponding to image information including the light source emitted from the corresponding light and standard light source unit acquired through the camera unit 110 under the control of the control unit 160 ( or sound effects).

The controller (or microcontroller unit (MCU)) 160 executes the overall control function of the light intensity characteristic analysis device 100.

In addition, the control unit 160 executes the overall control function of the light intensity characteristic analysis device 100 using the program and data stored in the storage unit 130. The control unit 160 may include RAM, ROM, CPU, GPU, and a bus, and the RAM, ROM, CPU, GPU, etc. may be connected to each other through a bus. The CPU can access the storage unit 130, perform booting using the O/S stored in the storage unit 130, and use various programs, content, data, etc. stored in the storage unit 130. This allows you to perform various operations.

In addition, the control unit 160 controls the setting value of the camera unit 110 at the time of acquiring image information through the camera unit 110, the location information of the camera unit 110 at the time of acquiring the image information, and the time of acquiring the image information. Collect weather information around the relevant light fixture. Here, the settings of the camera unit 110 (or camera settings when shooting) include exposure time, resolution, recording format, etc. In addition, the location information of the camera unit 110 at the time of acquiring the image information includes the height above the water (or ground), latitude and longitude collected by a GPS receiver (not shown), etc. At this time, the control unit 160 performs a pre-processing function on the image information acquired through the camera unit 110, and performs a noise removal function, an adjustment function according to the port backlight characteristics related to the light, etc. .

In addition, the control unit 160 tracks the lantern light source and the standard light source based on the acquired (or photographed) image information and sets the area of the lantern light source and the area of the standard light source, respectively.

That is, as the control unit 160 radiates light in a manner in which the illuminator and the standard light source rotate at a certain period, light may be visible in an image (or still image) at a specific point in the acquired image information, or You may not see it. Here, the rotation period of the lamp and the standard light source may be the same or different from each other.

Accordingly, the control unit 160 manages (or acquires/films) the image information acquired through the camera unit 110 in the form of a video (or in the form of a plurality of continuous still images acquired at preset cycles/intervals). In the video (or video information/sequential still images), the state in which the light emitted by the lantern and the standard light source unit is blinking is identified (or confirmed), and the light source is activated at the time the light is visible. Track the luminaire light source and the standard light source within the image information (or track the position of the luminaire light source and the standard light source within the image information so that the center point area can be captured (or identified/identified). /Check/or track/check the center point of the lantern light source and the center point of the standard light source within the image information.

In addition, the control unit 160 selects the light source on the image information based on the tracked (or confirmed) light source and the standard light source (or the center point of the light source and the center point of the standard light source). Set the area (or luminaire light source area) and the area of the standard light source (or standard light source area), respectively.

That is, the control unit 160 controls a preset radius (for example, For example, the area corresponding to the preset number of adjacent pixels) is set as the area of the light source light source and the area of the standard light source, respectively.

In addition, the control unit 160 determines the luminance value (or average luminance value / luminance field measurement luminance value) related to the lantern (or lantern light source) based on the set area of the lantern light source, the image information, etc., and the maximum Calculate (or calculate/measure/extract) the luminance value (or maximum luminance value of the lamp), minimum luminance value (or minimum luminance value of the lamp), etc. At this time, the control unit 160 may calculate the average of a plurality of pixels corresponding to the area of the light source of the light source in the image information as a luminance value related to the light source.

That is, the control unit 160 converts the RGB values of the image information into tristimulus value Extracted from the luminance value of the group.

In addition, the control unit 160 sets the maximum luminance value (or maximum luminance value) corresponding to the pixel with the maximum luminance value in the area of the set illuminator light source in the image information and the pixel with the minimum luminance value. The corresponding minimum luminance value (or minimum luminance value) is extracted, respectively.

In addition, the control unit 160 determines the luminance value (or average luminance value/field measured luminance value of standard light source) and maximum luminance value (or maximum luminance value of standard light source) related to the standard light source based on the set area of the standard light source, the image information, etc. Calculate (or calculate/measure/extract) the luminance value), minimum luminance value (or standard light source minimum luminance value), etc. At this time, the control unit 160 may calculate the average of a plurality of pixels corresponding to the area of the standard light source in the image information as a luminance value related to the standard light source.

That is, the control unit 160 converts the RGB values of the image information into tristimulus value XYZ values, and scales the Y value corresponding to the area of the standard light source from the converted tristimulus value Extract the luminance value (or average luminance value/standard light source field measurement luminance value).

In addition, the control unit 160 sets the maximum luminance value (or standard light source maximum luminance value) corresponding to the pixel with the maximum luminance value in the set area of the standard light source in the image information and the pixel with the minimum luminance value. Each of the minimum luminance values (or standard light source minimum luminance values) is extracted.

In addition, the control unit 160 provides the calculated (or calculated/measured/extracted) field-measured luminance value of the lantern, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the preset standard light source. Based on the above, calculate (or calculate) the luminous intensity value of the lantern to be analyzed and the luminous intensity value of the standard light source, respectively. Here, the inspection information before use of the standard light source (or the characteristic information of the standard light source) is the luminance value measured in advance using the standard light source indoors (or in a dark room), the luminance value, the standard luminance value, and the standard luminance value before use of the standard light source. Includes inspection luminance value before use of light source.

That is, the control unit 160 calculates the luminous intensity value of the lantern using the following proportional equation [Equation 1] and the following [Equation 2].

In addition, the control unit 160 calculates the luminous intensity value of the standard light source using the proportional equation according to the following [Equation 3] and the following [Equation 4].

Here, the variable a represents the field-measured luminance value of the lantern (unit: cd/㎡), b represents the luminance value of the lantern (unit: cd), and c represents the field-measured luminance value of the standard light source. where d represents the luminance value of the standard light source, e represents the inspection luminance value before using the standard light source, and f represents the inspection luminance value before using the standard light source.

In addition, the control unit 160 includes the calculated (or calculated/measured/extracted) field-measured luminance value of the lantern, the calculated luminance value of the lantern, the calculated field-measured luminance value of the standard light source, Calculate the corrected luminance luminance value and the corrected luminance luminance value based on the pre-use inspection information of the standard light source, etc.

That is, the control unit 160 determines that the pre-use inspection information of the standard light source applied in the preceding [Equation 1] to [Equation 4] is the luminance value and luminance value of the standard light source obtained through the pre-use inspection, In order to apply the ratio of the luminance value of the standard light source to the luminance value and luminance value of the lantern for which the luminance value is to be obtained, the corrected luminance value of the lantern and the corrected luminance value are calculated according to the following [Equation 5] according to the proportional relationship. Calculate each luminance value.

Here, the variable A represents the corrected luminance value of the lantern (or the corrected luminance value of the lantern), and the variable B represents the corrected luminance value of the lantern (or the corrected luminance value of the lantern).

In addition, the control unit 160 controls the set area (or range 1) of the luminaire light source, the set area (or range 2) of the standard light source, the inspection luminance value before using the standard light source, and the inspection luminance value before using the standard light source. , the corrected light luminance value (or range 1 luminance value), the corrected light luminance value (or range 1 luminance value), the calculated field-measured luminance value of the standard light source (or range 2 luminance value), the The calculated luminance value of the standard light source (or range 2 luminance value), the extracted maximum luminance value and minimum luminance value of the lantern (or range 1 maximum and minimum luminance values), and the extracted maximum luminance of the standard light source. The value, minimum luminance value of the standard light source (or maximum and minimum luminance values in range 2), measurement time information, etc. are output through the display unit 140 and/or the audio output unit 150.

In this way, image information including the light source emitted from the lantern and the standard light source is acquired, the field-measured luminance value of the lantern and the field-measured luminance value of the standard light source are calculated from the acquired image information, respectively, and the calculated luminance value is calculated. Calculate the luminance value of the light source to be analyzed and the luminance value of the standard light source, respectively, based on the field-measured luminance value of the standard light source, the calculated field-measured luminance value of the standard light source, and the pre-use inspection information of the standard light source. Calculate the corrected luminance value of the lantern and the corrected luminance value of the lantern based on the field measured luminance value, calculated luminance value of the lantern, pre-use inspection information of the standard light source, etc., and calculate the calculated corrected luminance value of the lantern. and can provide corrected illuminator luminance values.

Hereinafter, the image-based method of analyzing light intensity characteristics according to the present invention will be described in detail with reference to FIGS. 1 to 5.

Figure 2 is a flowchart showing an image-based method of analyzing light intensity characteristics according to an embodiment of the present invention.

First, the camera unit 110 radiates (or emits) from the lantern (not shown) and the standard light source unit (not shown) within a preset distance range (e.g., 200 m to 300 m). Image information (or video/multiple continuous still images acquired at preset periods or intervals) including a light source is acquired (or photographed). At this time, the lantern and the standard light source may be arranged (or installed/configured) adjacent to each other.

In addition, the control unit 160 controls the setting value of the camera unit 110 at the time of acquiring image information through the camera unit 110, the location information of the camera unit 110 at the time of acquiring the image information, and the location information of the camera unit 110 at the time of acquiring the image information. Collect weather information around the light fixture. Here, the settings of the camera unit 110 (or camera settings when shooting) include exposure time, resolution, recording format, etc. In addition, the location information of the camera unit 110 at the time of acquiring the image information includes the height above the water (or ground), latitude and longitude collected by a GPS receiver (not shown), etc.

As an example, the first camera unit 110 acquires first video information including a plurality of light sources emitted from the first light and the first standard light source, respectively.

In addition, the first control unit 160 collects the first setting value of the first camera unit at the time of acquiring the first video information, the first location information of the first camera unit, and the first weather information around the first light fixture. Do it (S210).

Thereafter, the control unit 160 tracks the lantern light source and the standard light source based on the acquired (or photographed) image information and sets the area of the lantern light source and the area of the standard light source, respectively.

That is, as the control unit 160 radiates light in a manner in which the illuminator and the standard light source rotate at a certain period, light may be visible in an image (or still image) at a specific point in the acquired image information, or You may not see it. Here, the rotation period of the lamp and the standard light source may be the same or different from each other.

Accordingly, the control unit 160 manages (or acquires/films) the image information acquired through the camera unit 110 in the form of a video (or in the form of a plurality of continuous still images acquired at preset cycles/intervals). In the video (or video information/sequential still images), the state in which the light emitted by the lantern and the standard light source unit is blinking is identified (or confirmed), and the light source is activated at the time the light is visible. Track the luminaire light source and the standard light source within the image information (or track the position of the luminaire light source and the standard light source within the image information so that the center point area can be captured (or identified/identified). /Check/or track/check the center point of the lantern light source and the center point of the standard light source within the image information.

In addition, the control unit 160 selects the light source on the image information based on the tracked (or confirmed) light source and the standard light source (or the center point of the light source and the center point of the standard light source). Set the area (or luminaire light source area) and the area of the standard light source (or standard light source area), respectively.

That is, the control unit 160 controls a preset radius (for example, For example, the area corresponding to the preset number of adjacent pixels) is set as the area of the light source light source and the area of the standard light source, respectively.

For example, as shown in FIGS. 3 and 4, the first control unit tracks the first light source and the first standard light source in the obtained first video information, and displays the first video information within the first video information. The first position 410 of the first lantern light source and the first position 420 of the first standard light source are confirmed.

In addition, the first control unit sets a first light source area 430 corresponding to a preset radius from the first position 410 of the confirmed first light source in the first video information, A first standard light source area 440 corresponding to the preset radius is set from the first position 420 of the confirmed first standard light source within the first video information (S220).

Thereafter, the control unit 160 determines the luminance value (or average luminance value/luminance field measurement luminance value) related to the lantern (or lantern light source) based on the set area of the lantern light source, the image information, etc., and the maximum Calculate (or calculate/measure/extract) the luminance value (or maximum luminance value of the lamp), minimum luminance value (or minimum luminance value of the lamp), etc.

That is, the control unit 160 converts the RGB values of the image information into tristimulus value Extracted from the luminance value of the group.

In addition, the control unit 160 sets the maximum luminance value (or maximum luminance value) corresponding to the pixel with the maximum luminance value in the area of the set luminance light source in the image information and the pixel with the minimum luminance value. The corresponding minimum luminance value (or minimum luminance value) is extracted, respectively.

In addition, the control unit 160 determines the luminance value (or average luminance value/field measured luminance value of standard light source) and maximum luminance value (or maximum luminance value of standard light source) related to the standard light source based on the set area of the standard light source, the image information, etc. Calculate (or calculate/measure/extract) the luminance value), minimum luminance value (or standard light source minimum luminance value), etc.

That is, the control unit 160 converts the RGB values of the image information into tristimulus value XYZ values, and scales the Y value corresponding to the area of the standard light source from the converted tristimulus value Extract the luminance value (or average luminance value/standard light source field measurement luminance value).

In addition, the control unit 160 sets the maximum luminance value (or standard light source maximum luminance value) corresponding to the pixel with the maximum luminance value in the set area of the standard light source in the image information and the pixel with the minimum luminance value. Each of the minimum luminance values (or standard light source minimum luminance values) is extracted.

As an example, the first control unit converts the RGB values of the first video information into tristimulus values XYZ values.

In addition, the first control unit scales the scale-corrected value of the Y value corresponding to the light source area of the first light source from the converted tristimulus value ) to extract.

In addition, the first control unit controls the first light source maximum luminance value (for example, 250 cd/m2) and the luminance value corresponding to the pixel with the maximum luminance value in the set first light source area in the first video information. The minimum luminance value (for example, 115 cd/㎡) of the first light source corresponding to this minimum pixel is extracted, respectively.

In addition, the first control unit scales the scale-corrected value of the Y value corresponding to the first standard light source area from the converted tristimulus value Extract with

In addition, the first control unit sets the first standard light source maximum luminance value (for example, 260 cd/m2) and the minimum luminance value corresponding to the pixel with the maximum luminance value in the set first standard light source area in the first video information. The minimum luminance value (for example, 120 cd/m2) of the first standard light source corresponding to the in-pixel is extracted (S230).

Thereafter, the control unit 160 provides the calculated (or calculated/measured/extracted) field-measured luminance value of the lantern, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the preset standard light source. Based on the above, calculate (or calculate) the luminous intensity value of the lantern to be analyzed and the luminous intensity value of the standard light source, respectively. Here, the inspection information before use of the standard light source (or the characteristic information of the standard light source) is the luminance value measured in advance using the standard light source indoors (or in a dark room), the luminance value, the standard luminance value, and the standard luminance value before use of the standard light source. Includes inspection luminance value before use of light source.

That is, the control unit 160 calculates the luminous intensity value of the lantern according to the preceding [Equation 2] using the proportional equation according to the preceding [Equation 1].

In addition, the control unit 160 calculates the luminous intensity value of the standard light source using the proportional equation according to the preceding equation 3 and the above equation 4.

As an example, the first control unit determines the luminous intensity value of the first light (for example, b = 150 * 100 / 250 = 60 cd). Here, the pre-use inspection luminance value (e) of the first standard light source may be 250 cd/m2, and the pre-use inspection luminance value (f) of the first standard light source may be 100 cd.

In addition, the first control unit determines the luminance value of the first standard light source (for example, d = 200 * 100 / 250 = 80cd) is calculated (S240).

Thereafter, the control unit 160 includes the calculated (or calculated/measured/extracted) field-measured luminance value of the light source, the calculated luminance value of the light source, the calculated field-measured luminance value of the standard light source, Calculate the corrected luminance luminance value and the corrected luminance luminance value based on the pre-use inspection information of the standard light source, etc.

That is, the control unit 160 determines that the pre-use inspection information of the standard light source applied in the preceding [Equation 1] to [Equation 4] is the luminance value and luminance value of the standard light source obtained through the pre-use inspection, In order to apply it to the luminance value and luminance value of the lantern for which the ratio of the luminance value of the standard light source is to be obtained, the luminance value of the illuminator corrected by the preceding [Equation 5] according to the proportional relationship and the luminance value of the corrected illuminator Calculate each luminance value.

As an example, the first control unit determines a first corrected luminance value (for example, A = 150 Calculate and calculate the first corrected luminous intensity value (e.g., B = 60 * 250 / 200 = 75 cd) (S250).

Thereafter, the control unit 160 determines the set area (or range 1) of the luminaire light source, the set area (or range 2) of the standard light source, the inspection luminance value before using the standard light source, and the inspection luminance value before using the standard light source. , the corrected light luminance value (or range 1 luminance value), the corrected light luminance value (or range 1 luminance value), the calculated field-measured luminance value of the standard light source (or range 2 luminance value), the The calculated luminance value of the standard light source (or range 2 luminance value), the extracted maximum luminance value and minimum luminance value of the lantern (or range 1 maximum and minimum luminance values), and the extracted maximum luminance of the standard light source. The value, the minimum luminance value of the standard light source (or maximum and minimum luminance values in range 2), measurement time information, etc. are output through the display unit 140 and/or the audio output unit 150.

As an example, as shown in FIG. 5, the first control unit controls the set first luminaire light source area (e.g., range 1) 510, the set first standard light source area (e.g., range 2) ( 520), the pre-use inspection luminance value of the first standard light source (e.g., 250 cd/m2), the pre-use inspection luminance value of the first standard light source (e.g., 100 cd), and the calculated first corrected illuminator Luminance value (e.g. 187.5 cd/m2), the calculated first corrected luminance luminance value (e.g. 75 cd), field measured luminance value of the extracted first standard light source (e.g. 200 cd/m2) , the calculated luminance value of the first standard light source (e.g., 80 cd), the extracted maximum luminance value of the first light source light source (e.g., 250 cd/㎡), and the extracted minimum luminance value of the first light source light source ( For example, 115 cd/m2), the extracted maximum luminance value of the first standard light source (e.g., 260 cd/m2), the extracted minimum luminance value of the first standard light source (e.g., 120 cd/m2), first measurement time Information (for example, 01:20:30 to 01:21:00 on August 7, 2022) is displayed on the first display unit 140 (S260).

As described above, an embodiment of the present invention acquires image information including a light source radiating from a lantern and a standard light source, and obtains a field-measured luminance value of the lantern and a field-measured luminance value of a standard light source from the acquired image information. Calculate each, and calculate the luminance value of the light fixture and the luminance value of the standard light source to be analyzed based on the calculated field measurement luminance value of the light source, calculated field measurement luminance value of the standard light source, and pre-use inspection information of the standard light source. Calculate each, and calculate the corrected luminance luminance value and the corrected luminance luminance value based on the calculated field-measured luminance value of the lantern, the calculated luminance value of the lantern, and pre-use inspection information of the standard light source, etc. By providing the calculated and corrected luminance value of the lantern, the luminance value of the lantern that is the subject of measurement can be analyzed in real time based on video data captured by the camera, and expensive luminance meter equipment can be used. It can be replaced, and the inconvenience of having to calculate the luminance value as a luminance value can be improved.

The above-described content can be modified and modified by anyone skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Image-based light intensity characteristic analysis device
110: camera unit 120: communication unit
130: storage unit 140: display unit
150: audio output unit 160: control unit

Claims (10)

A camera unit that acquires image information including light sources emitted from the luminaire and the standard light source unit; and
Collect at least one of a setting value of the camera unit at the time of acquiring image information through the camera unit, location information of the camera unit at the time of acquiring image information, and weather information around the light fixture at the time of acquiring the image information, and collect the acquired image Track the lantern light source and the standard light source based on the information, set the area of the lantern light source and the area of the standard light source, respectively, and conduct on-site measurement of the lantern related to the lantern based on the set area of the lantern light source and the image information. Calculate the luminance value, the maximum luminance value of the lantern, and the minimum luminance value of the illuminator, and based on the area of the standard light source set above and the image information, the on-site measurement luminance value of the standard light source, the maximum luminance value of the standard light source, and the standard light source. Calculate the minimum luminance value, and calculate the luminance value of the luminaire to be analyzed based on the calculated field-measured luminance value of the light source, the calculated field-measured luminance value of the standard light source, and the pre-use inspection information of the preset standard light source, and Calculate the luminance value of each standard light source, the calculated field-measured luminance value of the light source, the calculated luminance value of the light device, the calculated field-measured luminance value of the standard light source, and the pre-use inspection information of the standard light source. An image-based lantern luminance characteristic analysis device including a control unit that calculates the corrected lantern luminance value and the corrected lantern luminance value, respectively. According to claim 1,
The inspection information before use of the above standard light source is,
An image-based light fixture luminance characteristic analysis device comprising a luminance value measured using the standard light source, a luminance value measured using the standard light source, and a luminance value inspected before using the standard light source. According to claim 1,
The area of the set light source, the area of the set standard light source, the test luminance value before using the standard light source, the test luminance value before use of the standard light source, the corrected light luminance value, the corrected light luminance value, the An image-based light fixture luminance characteristic analysis device, further comprising a display unit that displays the calculated field-measured luminance value of the standard light source and the calculated luminance value of the standard light source. Obtaining image information including a light source emitted from a luminaire and a standard light source unit by a camera unit;
Collecting, by a control unit, at least one of a setting value of the camera unit at the time of acquiring image information through the camera unit, location information of the camera unit at the time of acquiring image information, and weather information around the light fixture at the time of acquiring the image information. ;
Tracking the luminaire light source and the standard light source based on the acquired image information, by the control unit, and setting the area of the luminaire light source and the area of the standard light source, respectively;
Calculating, by the control unit, a lantern field-measured luminance value, a lantern maximum luminance value, and a lantern minimum luminance value related to the lantern based on the set area of the lantern light source and the image information;
Calculating, by the control unit, a standard light source field-measured luminance value, a standard light source maximum luminance value, and a standard light source minimum luminance value related to the standard light source based on the set area of the standard light source and the image information;
By the control unit, the luminance value and the standard light source are to be analyzed based on the calculated field-measured luminance value of the light source, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the preset standard light source. Calculating each luminance value of;
The light is corrected by the control unit based on the calculated field-measured luminance value of the light source, the calculated luminance value of the light device, the calculated field-measured luminance value of the standard light source, and pre-use inspection information of the standard light source. Calculating the luminance value and the corrected luminance value of the illuminator, respectively; and
By the control unit, the set area of the light source, the set area of the standard light source, the inspection luminance value before using the standard light source, the inspection luminance value before using the standard light source, the corrected luminance luminance value, and the corrected light source. An image-based light fixture luminance characteristic analysis method comprising the step of controlling to display the luminance value, the calculated field-measured luminance value of the standard light source, and the calculated luminance value of the standard light source on a display unit. According to claim 4,
The step of setting the area of the lantern light source and the area of the standard light source, respectively,
The image information acquired through the camera unit is managed in the form of a video, and the state in which the light emitted by the luminaire and the standard light source unit is blinking is checked within the image information, and the center point area of the light source is at the point when the light is visible. A process of tracking the luminaire light source and the standard light source within the image information so that they can be confirmed;
A process of setting an area corresponding to a preset radius from the lantern light source on the image information as an area of the lantern light source based on the tracked lantern light source; and
Image-based light intensity characteristic analysis, comprising the step of setting an area corresponding to the preset radius from the standard light source on the image information as the area of the standard light source based on the tracked standard light source. method. According to claim 4,
The step of calculating the field-measured luminance value of the lantern, the maximum luminance value of the lantern, and the minimum luminance value of the lantern related to the lantern,
A process of converting RGB values of the image information into tristimulus XYZ values;
A process of extracting a scale-corrected value of the Y value corresponding to the area of the light source of the light source from the converted tristimulus value
Extracting the maximum luminance value of the illuminator corresponding to a pixel with the maximum luminance value in the area of the set illuminator light source in the image information; and
An image-based luminance luminance characteristic analysis method comprising the step of extracting the luminance minimum luminance value corresponding to a pixel with the minimum luminance value in the area of the luminance light source set in the image information. According to claim 4,
The step of calculating the standard light source field-measured luminance value, standard light source maximum luminance value, and standard light source minimum luminance value related to the standard light source,
A process of converting RGB values of the image information into tristimulus XYZ values;
A process of extracting a scale-corrected value of the Y value corresponding to the area of the standard light source from the converted tristimulus value XYZ value as the luminance value of the standard light source field measurement;
extracting the maximum luminance value of the standard light source corresponding to a pixel with the maximum luminance value in the area of the set standard light source in the image information; and
An image-based light source luminance characteristic analysis method comprising the step of extracting the minimum luminance value of the standard light source corresponding to a pixel with the minimum luminance value in the area of the set standard light source in the image information. According to claim 4,
The step of calculating the luminous intensity value of the lamp is,
Calculate the luminous intensity value of the light fixture using the following equation,

Wherein a represents the field measured luminance value of the light source, b represents the luminance value of the light source, e represents the luminance value inspected before using a standard light source, and f represents the luminance value inspected before using a standard light source. An image-based light intensity characteristic analysis method, characterized in that: According to claim 4,
The step of calculating the luminance value of the standard light source is,
Calculate the luminous intensity value of the standard light source using the following equation,

The c represents the field measured luminance value of the standard light source, the d represents the luminance value of the standard light source, the e represents the luminance value inspected before using the standard light source, and the f represents the luminance value inspected before use of the standard light source. An image-based light intensity characteristic analysis method, characterized in that: According to claim 4,
The step of calculating the corrected lantern luminance value and the corrected lantern luminance value, respectively,
Calculate the corrected lantern luminance value and the corrected lantern luminance value using the following equation,

Wherein A represents the corrected luminance value of the lantern, B represents the corrected luminance value of the illuminator, A represents the field measured luminance value of the illuminator, and B represents the luminance value of the illuminator, Wherein c represents the field measured luminance value of the standard light source, and e represents the luminance value tested before using the standard light source.

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