baber/WOPTO huggingface dataset:
Patent KR-102266534-B1 (KR)
Title: Distribution cable connection system for underground power distribution
Inventor: LEE YEONG HONG
IPC: G01R31/08
Filed: 2021-01-21
Granted: 2021-06-21
Abstract: The present invention relates to a distribution line connection system for underground power distribution which quickly separates a connector coupled to a right cable in case of a failure in a vertical direction to block left and right cables and moves the connector to the right to separate a left conductor end of the left cable from a connection fixture of the connector so as to sufficiently obtain an insulation distance, thereby preventing arc generation between the left conductor end and the connector and which makes a blocking operation of the left and right cables and a separation operation between the left conductor end and the connector to be performed mechanically sequentially, thereby smoothly performing the blocking operation and the separation operation without interfering with each other.
Patent KR-102515003-B1 (KR)
IPC: B63H3/10
Filed: 2021-01-27
Granted: 2023-03-30
Abstract: 선박의 자세를 목적의 각도에 도달시킬 때의 연비를 향상시킨다. 
선체의 양측에 각각 마련된 2개의 추진력 발생 장치(113L, 113R)와, 선체의 선회를 제어하기 위한 타기(115)와, 선회 방향 및 선회량을 포함하는 선회 지령값을 취득하는 선회 지령 취득부(103)와, 선체의 속도 지령값을 취득하는 속도 취득부(107)와, 속도 취득부(107)가 취득한 속도 지령값이 속도 역치 이상인 경우, 타기(115)를 중립 위치로 하고, 또한 선회 방향 내측의 추진력 발생 장치(113L, 113R)의 추진력이 선회 방향 외측의 추진력 발생 장치(113L, 113R)의 추진력보다 작아지도록 2개의 추진력 발생 장치(113L, 113R)를 제어하여 선회 지령값에 따라서 상기 선박을 선회시키는 선회 제어부(111)를 구비한다.
Patent KR-102291367-B1 (KR)
Title: Wiring duct for building of communication cable
Inventor: KIM SUNG EUN
IPC: B25J19/02
Filed: 2021-01-29
Granted: 2021-08-20
Abstract: The present invention relates to a communication cable wiring duct for buildings, which comprises: a main body part having a cylindrical shape and having a hollow formed therein; a plurality of partition plates standing vertically on the outer circumferential surface of the main body to be spaced apart by equal angles; a cover mounting part formed on both side surfaces of an end part of the partition plate; a communication cable mounting part formed in a size and structure corresponding to the outer circumferential surface of a communication cable wired along the outer circumferential surface of the main body; a hanger part having one end coupled to the main body with a wire or a full thread bolt and having the other end fixed to the ceiling; a communication cable inspection car inspecting the communication cable mounted on the communication cable mounting part while moving along the hollow; and a cover allowing a transverse edge part to be fitted and mounted from one side of the cover mounting part in a slide manner, or allowing one end to be fitted into the cover mounting part and be bent by being pressed with a round part and allowing the other end to be fitted into the other cover mounting part to be mounted, thereby being interposed between adjacent partition plates. According to the present invention, the communication cable wiring duct provides an effect of enabling a worker to find a position where a problem occurs in a communication cable while minimizing effort.
Patent KR-102376882-B1 (KR)
Inventor: SANG WOO NA
IPC: C09J7/25
Filed: 2021-02-10
Granted: 2022-03-21
Abstract: The present invention provides an adhesive sheet for a display, including: a base substrate including polyethylene terephthalate; and a base film formed on a top surface of the base substrate, and including a first pressure-sensitive adhesive layer formed of a first adhesive composition including a first acrylate-based main agent resin and a crosslinking agent, wherein the polyethylene terephthalate has a coefficient of thermal expansion (CTE) of 20 to 30 ppm in a film machine direction (MD) and a film transverse direction (TD) measured according to measurement scheme 1. In the measurement scheme 1, the coefficient of thermal expansion is measured by stretching a base substrate sample (having a width of 4 mm and a length of 16 mm) with force of 0.5 mN by using a thermomechanical analyzer (TMA), recording a change of a distance (unit: ppm) in a sample machine direction (MD) and a sample transverse direction (TD) while raising a temperature up to -50 to 250 ℃ by 10 ℃/min, and extracting a change of a distance in the machine direction (MD) and the transverse direction (TD) within a range of -35 to 90 ℃ among recorded data. Accordingly, an adhesive sheet for a display with improved optical properties, heat resistance properties, flexibility, and folding properties (bending reliability) is provided.
Patent KR-102551753-B1 (KR)
Title: 수 전해 수소생성 효율 향상을 위한 전이금속 촉매 표면 부분 비정질화 기술
IPC: B01J35/00
Filed: 2021-02-16
Granted: 2023-07-06
Abstract: 본 발명은 귀금속 기반 촉매를 대체할 수 있는 수 전해 수소 생산을 위한 고효율 저단가 촉매를 제공하고자 함이다. 본 발명의 새로운 고효율 저단가 촉매는 흡착 위치의 수를 늘리고 전하 운송을 용이하게 할 수 있는 OER에서 사용되는 고효율의 히드록시드-기반 전기촉매를 설계하는 새로운 “듀얼-상 기술” dual-phase engineering을 제공한다. 
기존 촉매 성능 향상을 위해서는 복잡한 나노구조제어, 결함제어 등이 필요하나 본 발명의 기술을 활용하면 간단한 화학공정으로 촉매 표면을 부분비정질화 시켜 수소생성 효율 향상을 가능하게 한다. 본 발명의 촉매를 사용할 경우 뛰어난 내구성에 수소 생산효율도 높일 수 있을 뿐 아니라 촉매가격을 기존 대비 약 40% 수준으로 절감시킬 수 있다. 본 발명에서 개발한 니켈 보라이드 소재 뿐만이 아니라 다양한 전이금속 기반 촉매에 모두 적용이 가능하여 기술적 파급 효과가 클 것으로 기대된다.
Patent KR-102484646-B1 (KR)
Title: 인쇄기판형 증기발생기 및 이를 구비하는 원전
IPC: F22B37/42
Filed: 2021-02-23
Granted: 2023-01-04
Abstract: 본 발명은 제1 유체가 유입 또는 유출되는 제1 유입관 및 제1 유출관과, 상기 제1 유입관 및 상기 제1 유출 관과 서로 다른 방향을 향하도록 배치되어, 제2 유체가 유입 또는 유출되는 제2 유입관 및 제2 유출관을 구비하는 열교환 모듈; 상기 열교환 모듈의 내부에서 상기 제1 유입관과 상기 제1 유출관을 연결하는 제1 유로를 구비하는 제1 플레이트; 및 상기 제1 플레이트의 인접한 위치에 배치되며, 상기 제2 유입관과 상기 제2 유출관을 연결하는 제2 유로를 구비하는 제2 플레이트를 포함하고, 상기 제1 플레이트와 상기 제2 플레이트는, 각각 복수개로 이루어져, 상기 열교환 모듈의 내부에서 서로 번갈아가며 적층되며, 상기 제1 유로는, 직선형으로 이루어지고, 상기 제2 유로는, 상기 제1 유로와 서로 다른 유로의 길이를 가지도록 적어도 어느 한 부분에서 절곡된 형태로 이루어지는 증기발생기에 관한 것이다.
Patent KR-102356556-B1 (KR)
Inventor: KWON JONG HO
IPC: G01F23/00
Filed: 2021-02-25
Granted: 2022-02-08
Abstract: The present invention provides a water level measuring device with a dead band removed, which comprises: a plate attached to one area of an upper surface in a sewer, which is a passage through which a fluid moves; an ultrasonic sensor installed in one area of the plate to output or receive an ultrasonic wave in a longitudinal direction of the sewer; an ultrasonic path change unit which is installed to face the ultrasonic sensor in a state spaced apart by a dead band interval determined for each specification of the ultrasonic sensor, and changes a movement path of the ultrasonic wave output from the ultrasonic sensor to a lower surface direction of the sewer, wherein the ultrasound path change unit changes the movement path of the ultrasound wave reflected by the fluid to a direction in which the ultrasound sensor is located when the ultrasound wave reflected in the direction of the lower surface is reflected by the fluid; and a management control unit which is connected to the ultrasound sensor and the ultrasound path change unit through a network to control at least one function of the ultrasound sensor and the ultrasound path change unit, or when the ultrasonic wave is received through the ultrasonic sensor, calculates the level of the fluid in the sewer based on the received ultrasonic wave to predict whether the sewer is submerged. In addition, various other embodiments identified through the present document are possible. Therefore, the present invention can accurately measure the level of the fluid.
Patent KR-102298680-B1 (KR)
Title: Method for quantifying water and lipid content in turbid media using narrow-band diffuse reflectance spectroscopy
Inventor: LAM JESSE HOU
IPC: A61B5/00
Filed: 2021-02-26
Granted: 2021-09-07
Abstract: The present invention relates to a method for quantifying the water and lipid content in a turbid media. According to the present invention, a method to quantify the water and lipid content through a non-invasive method in turbid media like a body tissue, in which scattering occurs when near infrared rays (NIR) penetrate has not been presented. In addition, the prior art body composition measurement apparatus and method have problems that a hardware configuration is complicated and mass production and sales are limited due to use of diffuse optical spectroscopy (DOS) in a frequency domain and time domain or infrared spectroscopy to measure the water and lipid content of tissue. To solve the problems, the present invention provides a method for quantifying the water and lipid content in a turbid media using narrow-band diffuse reflectance spectroscopy, configured to accurately quantify the water and lipid content of tissue with a simpler configuration than before by using only a near-infrared band of 900 to 1,000 nm. The method comprises a measurement step and an analysis step.
Patent KR-102434839-B1 (KR)
Inventor: SUH IL YANG
IPC: A47J31/06
Filed: 2021-03-05
Granted: 2022-08-22
Abstract: Disclosed is a dripper including a variable structure. According to the present invention, a dripper performs coffee brewing by accommodating a paper filter and ground coffee beans inside after being placed on a glass server. The dripper comprises: an air channel forming unit having a trapezoidal structure whose width gradually narrows downward, formed in a structure in which grooves indented by a predetermined depth along a vertical center line on an outer surface are continuous in a vertical direction, and made of a material having a predetermined amount of elastic restoring force; a rib line forming unit integrally binding the air channel forming unit and the other air channel forming unit to form an inverted conical structure whose inner diameter narrows downward, forming a rib line protruding by a predetermined height on the outer surface in a continuous structure in the vertical direction, and made of a material having a predetermined amount of elastic restoring force; and an air channel formed by the groove of the air channel forming unit and the rib line of the rib line forming unit, disposed and spaced apart at regular intervals along an inner circumferential surface of the inverted conical structure, and having a continuous structure in the vertical direction. Accordingly, smooth coffee brewing can be induced.
Patent KR-102298131-B1 (KR)
Title: Safety air-dome
Inventor: CHO BYUNG WOOK
IPC: E04H15/22
Filed: 2021-03-10
Granted: 2021-09-07
Abstract: The present invention relates to a safe air-dome structure. The safe air-dome structure includes: a membrane material having an edge fixed to a floor or structure; an outside air supply part supplying outside air to a large space formed in a lower part of the membrane material or to a space between membrane materials comprising a plurality of layers to keep the membrane material floated in a dome shape; and a safety support part preventing the membrane material from sagging along a specific trace of the large space to the extent of no less than a set value when the membrane material is ripped or the outside air supply part has an operation error or is stopped. According to the present invention, in the case of an air-dome structure formed of only a dome-shaped membrane material unlike existing technology, the safety support part is provided along a specific trace to support the membrane material such that the membrane material can be prevented from sagging to the extent of no less than a set value, and, accordingly, damage to a person or facility in the large space, which is caused by the collapse or sagging of the membrane material as the membrane material is ripped or outside air is not smoothly supplied into the large space due to the membrane material.
Patent KR-102578026-B1 (KR)
Title: 기판 처리 방법, 반도체 장치의 제조 방법, 기판 처리 장치 및 프로그램
IPC: H01L21/02
Filed: 2021-03-15
Granted: 2023-09-14
Abstract: 기판 상에 형성되는 산화막의 막질을 향상시킨다.   
(a1) 기판에 대하여 제1 성막 가스를 공급함으로써 산질화막을 형성하는 공정과, (a2) 기판에 대하여 제1 산화 가스를 공급함으로써, 산질화막을 산화시켜서 제1 산화막으로 변환시키는 공정을 비동시에 행하는 사이클을 소정 횟수 행함으로써, 기판 상에, 소정 막 두께의 제1 산화막을 형성하는 공정을 행한다.
Patent KR-102348874-B1 (KR)
Title: Composition for preventing or Treating female climacteric syndrome comprising Polygonatum extracts
Inventor: PARK DU RI
IPC: A61P5/24
Filed: 2021-03-15
Granted: 2022-01-11
Abstract: The present invention relates to a composition for preventing or treating female menopausal symptoms, comprising an extract of Polygonatum sibirium as an active component. The composition prevents or treats symptoms such as hot flashes, tachycardia, sweating, depression, sleep disturbance, anxiety, obsessive compulsive disorder, impatience, loss of self-esteem and confidence, helplessness, low motivation, irritable mood disorder, cardiovascular disease, osteoporosis, arthralgia, muscle pain and decreased muscle mass, obesity, increased prevalence of metabolic syndrome, vaginal dryness, and the like in menopausal women, and at the same time, does not cause the risk of endometriosis, resulting in a safe treatment effect for female menopausal symptoms.
Patent KR-102289205-B1 (KR)
IPC: A47L11/40
Filed: 2021-03-17
Granted: 2021-08-13
Abstract: 본 발명은 청소기의 노즐에 관한 것이다.  
본 발명의 청소기의 노즐은, 먼지를 포함한 공기가 유동하며, 좌우 방향으로 연장되는 제 1 유로와, 상기 제 1 유로에서 전후 방향으로 연장되는 제 2 유로를 포함하는 흡입 유로를 구비하는 노즐 하우징; 상기 노즐 하우징에 장착되며, 상기 걸레로 공급되기 위한 물을 저장하는 물 탱크; 상기 노즐 하우징의 하측에서 좌우 방향으로 이격되어 배열되며, 각각이 걸레가 부착될 수 있는 회전판을 구비하는 제 1 회전 청소부 및 제 2 회전 청소부; 상기 노즐 하우징 내에 배치되며, 상기 제 1 회전 청소부를 구동하기 위한 제 1 구동 모터를 구비하는 제 1 구동 장치; 상기 노즐 하우징 내에 배치되며, 상기 제 2 회전 청소부를 구동하기 위한 제 2 구동 모터를 구비하는 제 2 구동 장치; 및 상기 노즐 하우징의 바닥벽에 구비되며, 상기 물 탱크의 물을 상기 각 회전 청소부로 공급하기 위한 물 배출구를 포함할 수 있다.
Patent KR-102337821-B1 (KR)
Title: Hybrid bonded carbon fiber sheet reinforcement device and method consisting of adhesive and slide fitting
Inventor: KIM CHANG JAE
IPC: E04G23/02
Filed: 2021-03-25
Granted: 2021-12-08
Abstract: The present invention provides a hybrid coupling type carbon fiber sheet reinforcing apparatus consisting of adhesion and slide fitting, comprising a rail type reinforcing bracket (100), a carbon fiber sheet bar (200), and a carbon-carbon hybrid type carbon fiber sheet (300). The carbon fiber sheet reinforcing apparatus is installed on a surface of a structure to be reinforced and forms the carbon fiber sheet on the surface of the structure in a hybrid coupling way consisting of adhesion by an adhesive and slide fitting, to improve a work speed by 80% and to lower a maintenance cost by 50% or less compared to a convention. Because thin carbon fibers are mixed between thick carbon fibers arranged in a same direction, a seismic vibration transmission area of each carbon fiber is increased and thereby a strength and an elasticity property against seismic vibration is improved by 2 to 4 times compared to the conventional carbon fiber sheet. The rail type reinforcing bracket and the carbon fiber sheet bar primarily support the carbon-carbon hybrid type fiber sheet with elasticity and the adhesive secondly supports the carbon-carbon hybrid type fiber sheet, so that a bending strength of the structure is improved by 80% compared to the convention.
Patent KR-102433629-B1 (KR)
Inventor: CHO BYOUNG KWAN
IPC: G01N21/359
Filed: 2021-04-06
Granted: 2022-08-18
Abstract: The present invention relates to a foldable hyperspectral imaging measurement device, which can be used to measure the phenotypes of crops grown in a narrow open-field environment with ridges and shade cloths. The foldable hyperspectral imaging measurement device comprises: a crop phenotype measurement unit (1000), which consists of a near-infrared hyperspectral (HSI) camera (1100) for photographing the state of crops, and an image processing unit (1200) which processes images taken by the near-infrared hyperspectral (HSI) camera into a hypercube; a measurement unit support frame (2000), which has a measurement unit support unit (2100) which supports the near-infrared hyperspectral (HSI) camera (1100) and the image processing unit (1200); a mounting unit (3000), which is assembled to be detachable from the lower side of the measurement part support frame (2000) and is installed on an open-field ridge; and an elastic clip (4000), which assembles the measurement unit support frame (2000) and the mounting unit (3000).
Patent KR-102345834-B1 (KR)
Title: Method, Apparatus and Computer program for providing knit producing platform
Inventor: WOO JAE HEE
IPC: G06Q50/28
Filed: 2021-04-08
Granted: 2021-12-31
Abstract: The present invention relates to a method, device, and program for providing a knit producing platform capable of performing a knit production process at once interworking with a yarn company which supplies yarn through a platform and a production plant which develops and knits fabric. According to an embodiment of the present invention, the method for providing a knit producing platform for interworking with and producing knitted products includes the steps of: receiving information on knit products to be produced from a seller terminal; selecting a yarn company and a production plant according to the information of the knit product; and mediating the production process of the knitted product produced at the selected production plant by using the yarn provided from the selected yarn company.
Patent KR-102498060-B1 (KR)
IPC: F27D7/06
Filed: 2021-04-12
Granted: 2023-02-10
Abstract: 본 발명은 가스를 균일한 유량 및 유속으로 공급할 수 있는 가스 공급유닛에 관한 것으로, 상기 가스 공급유닛은 중공 형태로 마련되어 내측에 가스가 공급되고 개방된 상측으로 공급되는 가스를 외측으로 배출하도록 원주 방향 및 길이 방향을 따라 복수의 유입홀이 형성된 내측 배관과, 상기 유입홀을 통하여 배출된 가스를 외측으로 배출하도록 원주 방향 및 길이 방향을 따라 복수의 연통홀이 형성된 중간 배관과, 상기 연통홀을 통하여 배출된 가스를 외측으로 배출하도록 원주 방향 및 길이 방향을 따라 복수의 공급홀이 형성된 외측 배관, 그리고 상기 외측 배관에서 반경 방향의 외측으로 돌출 형성되고 복수의 상기 공급홀을 통하여 배출되는 가스를 원주 방향으로 이동하도록 가이드하는 가이드 플레이트를 포함한다. 이러한 구성으로, 균일한 유량 및 유속으로 가스를 공급할 수 있다.
Patent KR-102464559-B1 (KR)
IPC: B64G1/40
Filed: 2021-04-14
Granted: 2022-11-09
Abstract: 일 실시예에 따른 우주 공간 상에서 탑재체의 궤도를 천이 시키는 궤도 천이 장치는, 회전체; 상기 회전체의 중심부에 배치되고 상기 탑재체가 도킹되는 어댑터; 상기 회전체의 외곽에 배치되고 상기 탑재체를 발사시키는 발사 모듈; 및 상기 회전체를 회전시키는 추력기를 포함할 수 있고, 상기 발사 모듈은 상기 탑재체를 목표 궤도로 발사시킬 수 있다.
Patent KR-102375823-B1 (KR)
Inventor: YOO YANG MO
IPC: A61B8/08
Filed: 2021-04-16
Granted: 2022-03-17
Abstract: An ultrasound device according to an embodiment of the present invention may include a first ultrasound array, a second ultrasound array, an array control unit, and a signal processing unit. The first ultrasound array may include a plurality of first direction elements disposed along a first direction, and may transmit a first ultrasound transmission signal. The second ultrasound array may include a plurality of second direction elements disposed in a second direction perpendicular to the first direction, may transmit a second ultrasound transmission signal, and may be disposed at one side of the first ultrasound array. The array control unit may provide a control signal for controlling the first ultrasound array and the second ultrasound array. The signal processing unit may perform signal processing based on a first ultrasound reception signal received by the first ultrasound array and a second ultrasound reception signal received by the second ultrasound array. The ultrasound device according to the present invention acquires an ultrasound image by using the first ultrasound array and the second ultrasound array disposed at one side of the first ultrasound array in a second direction perpendicular to the first direction in which the first ultrasound array is disposed. It is possible to effectively implement the image desired by the user.
Patent KR-102467062-B1 (KR)
Inventor: SOO HYUNG KIM
IPC: G06T11/40
Filed: 2021-05-07
Granted: 2022-11-14
Abstract: The present invention relates to an automatic colorizing system and method for grayscale images. An image feature map generation unit applies pre-trained color weights to a grayscale image to generate an image feature map for an expected colored image. A color derivation unit learns the generated image feature map through deep learning to predict colors for each pixel of the grayscale image, and adjusts the color weights to minimize the color difference between the predicted colors and the predicted colorized image. The color derivation unit additionally derives positional information of each pixel and classifies the pixels into any one among a background, object, and person according to the derived location. A colorizing unit applies color weights for colors of the classified pixels to the pixels of the grayscale image to produce a colorized image. With this configuration, a grayscale image is automatically colorized, encouraging the conveyance of visual information from previously shot grayscale images. Through color regression, pixel segmentation, and color distribution, pixel-level meaning is clarified and color representation of the edges of an object can be enhanced.
Patent KR-102568396-B1 (KR)
Title: 이동 수단용 무선 충전 장치 및 이에 사용되는 자성 복합체
IPC: H01F38/14
Filed: 2021-05-21
Granted: 2023-08-18
Abstract: 일 구현예에 따른 이동 수단용 무선 충전 장치는 흡습률이 특정 범위로 조절된 자성부를 포함하므로, 무선 충전에 적용되는 주파수 및 고출력 하에서 높은 자성 특성 및 충전 효율을 제공할 수 있다. 따라서 상기 무선 충전 장치는 송신기와 수신기 간의 대용량의 전력 전송을 요구하는 전기 자동차와 같은 이동 수단에 적용될 수 있다.
Patent KR-102600483-B1 (KR)
IPC: C01B21/06
Filed: 2021-05-25
Granted: 2023-11-08
Abstract: 그래피틱 카본 나이트라이드 전구체 및 리튬 아이오다이드(LiI)/칼륨 아이오다이드(KI) 용융염을 혼합하는 단계; 및 혼합물을 열처리하는 단계;를 포함하는 그래피틱 카본 나이트라이드의 제조방법이 개시된다.
Patent KR-102370255-B1 (KR)
Title: An exhibition kiosk that provides design contents for clothing and textile structure objects, which are the target items for exhibition
Inventor: YUN SEOKMIN
IPC: G06Q50/10
Filed: 2021-05-28
Granted: 2022-03-04
Abstract: The present invention relates to an exhibition kiosk for providing customized design content of a textile structure object and garment, which is an item to be exhibited, which includes a computing device including one or more processors and one or more memories for storing commands executable in the processors. The exhibition kiosk of the present invention comprises: a main body placed in an exhibition hall; a display formed in one area of the main body, and outputting first design content implemented as at least one of a first textile structure object, which is a textile structure object formed as an image corresponding to a garment, which is an object to be exhibited, and a fiber structure included in fiber and a first garment object, which is a garment object formed as an image corresponding to a garment, which is to be exhibited, worn by a specific model; an insertion slot which is a space formed in one area of the main body and which is an area into which a plate including a code pattern is inserted; a sensor located in one area inside the insertion slot, and scanning a code pattern of the plate inserted into the insertion slot when the plate is inserted into the insertion slot; and a content control unit for converting the first design content which is output through the display into second design content to output the second design when the second design content implemented as at least one of a second garment object and a second textile structure object is generated, on the basis of design information corresponding to the scanned code pattern among a plurality of pieces of pre-stored design information when the code pattern is completely scanned by the sensor. In addition, various embodiments identified through the present disclosure are possible. Therefore, information on various garments and textiles can be provided for a customer.
Patent KR-102390125-B1 (KR)
Inventor: LEE IN HWAN
IPC: G01B11/02
Filed: 2021-05-28
Granted: 2022-04-25
Abstract: According to an embodiment of the present invention, a method for measuring the length of an object using a first module, a second module, and a smartphone comprises the steps of: (a) receiving, by the smartphone, information on the actual length between the first module and the second module from the first module or the second module; (b) acquiring a captured image including the first module, the second module, and the object; (c) calculating the pixel distance between the first module and the second module in the captured image; (d) determining a magnification constant based on the actual distance and the pixel distance between the first module and the second module; and (e) calculating the actual length of the object using the determined magnification constant. According to the present invention, the actual length of the object can be measured simply and accurately.