baber/WOPTO huggingface dataset:
Patent KR-20000022177-A (KR)
Title: Electropipettor and compensation means for electrophoretic bias
Inventor: PARCE J WALLACE
IPC: B01L3/02
Filed: 1997-06-25
Abstract: PURPOSE: A microfluidic system of high efficiency having electropipettor and compensation means for electrophoretic bias is provided to speedily and directly control the material movement through channels of the system. CONSTITUTION: A channel(140) for a microfluidic system includes two portions(142,144) with side walls which have surface charge of opposite polarity. The salt bridge (133) separates the fluids in channel (140) from an ionic fluid reservoir (135). The two channel portions (142, 144) are physically connected together by a salt bridge (133), such as a glass frit or gel layer. Electrodes(132,134) to impart electroosmotic and electrophoretic forces along the channel (140) between parts A and B are arranged to point(A) and (B). Additionally, a third electrode(137) is placed in the reservoir(135) at the cross of two portion(142,144).
Patent KR-20000022243-A (KR)
Title: Cable connecting arrangement for an electrical connector
Inventor: TAKASU HIDEKI
IPC: H01R13/6592
Filed: 1997-06-27
Abstract: PURPOSE: A method is provided for cable connecting arrangement for an electrical connector, which can construct. CONSTITUTION: The cable connecting arrangement of cable connector has a number of ground terminals and signal terminals. The terminal can be connected the ground cable to the terminal. A cable connection arrangement is provided wherein the braids (108) of a plurality of coaxial cables (100) are soldered to a grounding member (30), and the signal conductors are covered by inner insulators (110) and which extend forward beneath the grounding member (30). Ground plates (32) are formed on the grounding member (30) so that these ground plates (32) protrude from one edge of the ground member (30). The ground plates (32) and inner insulators (110) are offset from each other by approximately one half pitch. The ground plates (32) and the signal conductors are connected at the same time by press fitting into terminals (20a and 20b).
Patent KR-20000052184-A (KR)
Inventor: PARK GWANG HO
IPC: H01L21/304
Filed: 1999-01-30
Abstract: PURPOSE: Cleaning facilities are provided to prevent a floating matter from being again sticked to parts during a cleaning process, by separating a bottom of a cleaning bath from a gas line to prevent the floating matter sunken by eddy of cleaning solution from floating again. CONSTITUTION: Cleaning facilities comprise a cleaning bath(110), an exhaust pipe(140), a gas line(130) and a supporting bar(120). Cleaning solution is filled up to a predetermined level, of which a bottom surface is inclined a predetermined angle to easily exhaust the cleaning solution and a floating matter existing in the cleaning solution. The exhaust pipe is penetrated to a predetermined region of the bottom of the cleaning bath to exhaust the cleaning solution to a predetermined place. The gas line has a plurality of air bubble generating holes(135) to generate air bubble in the cleaning solution, separated a predetermined distance from the bottom of the cleaning bath. The supporting bar is separated a predetermined distance from the gas line, in which an air bubble inducing slot(125) is installed in a portion corresponding to the gas line and an article to clean is placed on a top surface of the supporting bar.
Patent KR-19990072767-A (KR)
Title: 도전성막의가공방법및장치
IPC: B23K26/40
Filed: 1999-02-19
Abstract: 본 발명은 에칭처리를 포함하는 포토리소그래피법(photolithographic method)을 이용한 경우와 같은 폐액처리 필요가 없고, 저비용으로서 다품종 소량생산에 매우 적합하며, 가공편차를 최소화하고, 도전성막의 일부 잔류, 절연성 기판의 손상등이 적은 도전성막의 가공방법 및 장치를 제공한다. 
     본 발명은 근적외 레이저광( 파장λ= 1064 nm )을 출사하는 YAG 레이저 1과, 상기 레이저 1로부터 출사된 레이저광을 절연성의 투명기판 3상의 도전성막 4의 근방까지 안내하는 스텝 인덱스( step index )형의 광섬유 201로 이루어진 광학계 2와, 투명기판 3이 재치된 재치대 5b를 갖는 X-Y 스테이지 5와, 레이저광의 조사방향과 직교하는 방향으로 투명기판 3을 이동시키도록 X-Y 스테이지 5를 구동제어하는 콘트롤러 6등을 구비한다. 상기 광섬유 201의 대신에 카레이도 스코프(kaleido scope)를 이용하여도 좋다.
Patent KR-19990077618-A (KR)
Title: 에폭시수지조성물
IPC: C08L63/00
Filed: 1999-03-05
Abstract: 본 발명은 저온 속경화성이 탁월하며, 저장 안정성(보존 안정성)이 양호한 폴리티올계 1액성 에폭시 수지 조성물을 제공한다. 
     본 발명에 따르는 조성물은 분자내에 에폭시 그룹을 2개 이상 갖는 에폭시 수지(1), 분자내에 티올 그룹을 2개 이상 갖는 티올 화합물(2), 고체분산형 잠재성 경화촉진제(3) 및 붕산 에스테르 화합물(4)을 필수성분으로서 포함함을 특징으로 하는 에폭시 수지 조성물이다.
Patent KR-19990046568-A (KR)
Title: 아크릴수지판의접합액조성및접합방법
IPC: C09J4/02
Filed: 1999-03-27
Abstract: 본 발명은 아크릴 판재의 접합액 조성 및 접합방법에 관한 것이다. 
     아크릴판은 투명도가 높고 안전성이 있기 때문에 이를 수족관과 같은 구조물 축조에 사용하면 매우 이상적이기는 하지만 이는 제작상 난접이 있어 두께 40mm 넓이 1200mm 길이 2400mm이상의 것은 생산할 수 없기 때문에 이를 수족관으로 축조할 려면 대형수족관의 경우는 수압에 의해 파열되므로 소형수조관 이외에는 사용할 수 없는 결점이 있어 이를 2중으로 중합되게 접착할 수도 있으나 기존의 접착제(클로르프름)는 경화촉진제가 첨가되고 있어 접착후에는 유색자국이 생기므로 이 또한 사용할 수 없는 결점이 있었던 것이다. 
     본 발명은 이상의 문제점을 해결하고자 발명한 것으로 이의 발명요지는 아크릴판재의 접합액을 조성함에 있어서는 경화촉진제를 사용하지 않고 열조정으로 경화(고정)가 가능하게 통상의 모노마(METHYL METH ACRYL GE)액에 30∼70℃의 열을 서서히 가하면서 이에 아크릴파우다를 투입 혼합하여 교질상의 액체를 얻고 이를 냉장보관한 다음 필요한 량을 소분하여 진공실에 투입한후 기표를 완전시킨 다음 이를 접합제로 사용할 수 있게 하고 이접합액를 이용하여 아크릴 판재를 중합할 시는 하부판재의 주연부에 2∼3mm 높이의 패킹을 부착하여 테두리를 형성하므로서 그 내부는 공실이 되게 하여 이공실에 상기의 접착액을 층입한 다음 그 위에 상부판재를 얻고 압압하여 상하판재가 일체로된 것을 협지구로 협지시켜 수조내에 투입한 후 열고정할시는 수조에 접합액 조성시에 가해진 온도 즉, 30∼70℃의 열을 서서히 38시간이상 가하면서 열고정(경화)시킨 후 이의 주연부를 절단가공하므로서 비교적두터운 중합판재를 얻고 이와 같이 하여 얻어진것을 종방향 또는 횡방향으로 연결할때는 연결접합부에 3∼5mm의 간격을 유지한 상태에서 그 저면 및 전후측에 테이프를 부착되므로서 공실을 형성하고 이 공실내에 전기한 종합액을 충전시킨 다음 히터나 적외선램프로 접합액조성시에 가해진 것과 같은 온도 즉 30∼70℃의 열을 38시간 이상 가하면 접합자국이 전혀 생기지 않고 아크릴 판재와 동질성상의 열고정(경화)이 가능케하므로서 비교적 넓고 두터운 이크릴 판재를 얻을수 있게 한 것이다
Patent KR-19990083163-A (KR)
IPC: D06M101/02
Filed: 1999-04-13
Abstract: The present invention relates to a process for the treatment of lyocell cellulose fibers which comprises treating the lyocell cellulose fibers with at least one compound of the formulawhereinR1 and R2 are each independently of the other halogen or a sulfo-substituted phenylamino radical, at least one of the two substituents R1 and R2 being halogen,R3 and R4 are each independently of the other unsubstituted phenyl or phenyl substituted by C1-C4alkyl, C1-C4alkoxy, acylamino, sulfo, -SO2-CH=CH2, -SO2-CH2CH2-OSO3H, -NH-CO-CBr=CH2 or by -NH-CO-CHBr-CH2Br,A1 and A2 are each independently of the other -O-, -S- or -NR5-, wherein R5 is hydrogen or C1-C4alkyl,A3 and A4 are each independently of the other -O-, -S- or -NR5-, or -A3-R3 is halogen and/or -A4-R4 is halogen, wherein R5 is hydrogen or C1-C4alkyl andB is an aromatic bridge member, or-A1-B-A2- is a bridge member of the formula -NH-CH2-CH(CH3)-NH-,with the proviso that the compound of formula (1) must contain at least one dihalotriazine radical, at least two monohalotriazine radicals or at least one substituent, but preferably at least two identical or different substituents, from the group consisting of -SO2-CH=CH2, -SO2-CH2CH2-OSO3H, -NH-CO-CBr=CH2 and -NH-CO-CHBr-CH2Br.
Patent KR-20000067199-A (KR)
Inventor: PARK GI YUN
IPC: F02M35/10
Filed: 1999-04-26
Abstract: PURPOSE: An air suction device for automotive vehicle is provided to achieve an improved effectiveness of filtering for foreign substances contained in sucked air and significantly reduce vibration and noise caused by a pressure of the sucked air. CONSTITUTION: A device comprises a cylindrical suction pipe(10) installed at a front surface of a vehicle so as to allow an atmospheric air to flow in, a first case(11) arranged to surround an outer periphery of the suction pipe and one end of which is open, the first case having at an outer periphery thereof a discharge pipe(12) directed toward an air cleaner, a second case(13) arranged to surround an outer periphery of the first case and one end of which is open, a third case(14) arranged to surround an outer periphery of the second case and which has at an outer periphery thereof a dust discharge opening(15) for discharging dust contained in the air, and a conical pressure distributing member(16) arranged at a surface of the third case facing an inlet opening of the suction pipe.
Patent KR-20000072954-A (KR)
Inventor: LEE SANG HYEON
IPC: H03M3/02
Filed: 1999-05-03
Abstract: PURPOSE: A delta-sigma modulator is provided which has reduced number of analog input signal inputting steps so that it has low noise and consumes low power. CONSTITUTION: A low noise delta-sigma modulator includes a differential voltage detector, a sigma-delta modulation amplifier, and a signal modulator. The differential voltage detector receives an analog signal and DC power. The analog signal is biased by the DC power so that the difference signal between the analog signal and DC power is detected by the differential voltage detector. The sigma-delta modulation amplifier samples the difference signal from the differential voltage detector and amplifies the difference between the difference signal and the DC voltage. The signal modulator modulates the analog signal amplified by the sigma-delta modulation amplifier.
Patent KR-20000073071-A (KR)
Inventor: LEE SEA JOONG
IPC: A01G9/24
Filed: 1999-05-04
Abstract: PURPOSE: Complete automatic vent maintains interior ventilation and temperature of vinyl house of vegetables, fruit etc. by using shape-memory alloy with unmanned, unpower and temperature control function, prevents damage of the farmer, controls temperature by user for oneself without inconvenience through all seasons, increases production by accurate temperature control. CONSTITUTION: Complete automatic vent comprises ventilating hole of cylinder; the upper end of cylinder is exposured for the outer about 7mm to prevent permeation of rain or snow into house; vent(5) in front of cylinder has 0.3mm tolerance to move, has a rise of 0.6mm to fix in opening the window and to prevent air; string hole(7) to draw window frame; locking link(6) to prevent opening of window in blowing hard; lever shape-memory alloy to move spring and lever; auxiliary BOX function to move shape-memory alloy spring BOX for constant distance in the front and the rear; temperature control handle(11) to move spring BOX(16); BOX to fix general spring(13) and shape-memory spring(12).
Patent KR-20000073322-A (KR)
Inventor: LEE WON HUI
IPC: F16H61/30
Filed: 1999-05-10
Abstract: PURPOSE: An apparatus for reducing speed change shock of an electronic pneumatic transmission and a method for controlling the same are provided to improve the durability by reducing the shock applied to the transmission, and to improve the riding feeling and speed changing feeling by reducing the crashing sound of speed change. CONSTITUTION: An apparatus for reducing speed change shock of an electronic pneumatic transmission includes a magnetic element(52) mounted on one end of a shift rod(30) of a gear shift device(12), a linear variable distance transducer(54) sensing the shift of the shift rod by a magnetic field, and an electronic control unit(8) controlling air pressure supplied to cylinders by recognizing a signal of the linear variable distance transducer.
Patent KR-20000005740-A (KR)
Inventor: MOOR PAUL M
IPC: G02B5/22
Filed: 1999-05-29
Abstract: PURPOSE: A structure of thin film stack is provided to prevent the absorbed and reflected light from disturbing the function of storage capacitor. CONSTITUTION: The thin film stack is placed to prevent light from being transferred through the inter pixel gap to silicon wafer in the surface of inter connection which is on the pixel of LCD light valve. The light absorbing thin film stack includes surface layer combination formed on the strong light absorbing backstopping layer. The incident light absorbed by the backstopping layer. The light reflected by the surface layer combination and/or the backstopping layer disappear by destructive interference. The destructive interference happens by the change of phase caused by the different optical characteristics of layers composing the light absorbing thin film stack.
Patent KR-20000047408-A (KR)
Inventor: SASIDA NAOYA
IPC: H01L27/105
Filed: 1999-06-02
Abstract: PURPOSE: A semiconductor apparatus and a method for manufacturing the same are provided to prevent a wiring from being oxidized when the wiring is covered by an insulating film, an oxide dielectric film of a capacitor from being degraded when the insulating film is formed and, simultaneously, raise the integration of a capacitor. CONSTITUTION: A layer in which an impurity is diffused is formed in a semiconductor substrate(1). A first insulating film(4) covering the layer is formed. A lower electrode(5) of a capacitor is formed on the first insulating film. An oxide dielectric film(6) of the capacitor is formed on the lower electrode. The upper electrode of the capacitor is formed on the oxide dielectric film. A second insulating film(8) covering the capacitor is formed. As etching the second insulating film and part of the first insulating film, a first opening hole is formed on the layer and a second opening hole is formed on the upper electrode. A metal for preventing oxidation, which is electrically connected to the layer through the first opening hole and to the upper electrode through the second opening hole, is formed on the second insulating film. As patterning the metal, a local wiring(9a) is formed in a range enclosing an area which passes through the first and second opening holes and, simultaneously, in which at least the upper electrode and the oxide dielectric film are contacted. A third insulating film(10) covering the local wiring is formed.
Patent KR-20000006113-A (KR)
Inventor: BARRIER JOHN VINCENT
IPC: B01J31/12
Filed: 1999-06-11
Abstract: PURPOSE: A carbamate compounding method is provided to fast compound, have a high yield rate and generate very little quantity of the residual. CONSTITUTION: The carbamate compounding method has the step that reacts isocyanate compound and hydroxylation compound under the existed catalyst that is selected from the group having zinc salt, tin dihalide, tin tetrahalide and aluminum acetyl acetonate.
Patent KR-20010002325-A (KR)
Inventor: KIM GYU WAN
IPC: F01N13/10
Filed: 1999-06-14
Abstract: PURPOSE: An exhaust manifold of a vehicle engine is provided to improve the purification efficiency of exhaust gas by raising temperature of a manifold high when an engine is started. CONSTITUTION: An exhaust manifold of a vehicle engine includes spaces(22a,22b) having entrances(23a,23b) closely positioned in the vicinity of an engine body(10) and an exhaust pipe at the inner and outer walls(21b,21a) of an exhaust manifold(20), wherein raising temperature of the manifold high is accelerated by the electric heating of the exhaust gas filled in the spaces. The spaces are formed entirely through the walls except both ends portions of a flange of the manifold. The exhaust manifold accelerates early achievement of the high temperature by maximally securing the area for the electric heating of the exhaust gas.
Patent KR-20010005145-A (KR)
Inventor: KIM JONG HYEON
IPC: H01R33/94
Filed: 1999-06-30
Abstract: PURPOSE: A heat dispersion device for an adapter is provided so that reliability can be improved by easily dispersing heat generated in an inner portion and casing of the adapter. CONSTITUTION: Input/output terminals protruded from both sides of a casing(3) are connected to a printed circuit board fixed in the casing(3). A plurality of electronic components are connected to the upper portion of the printed circuit board. In a first heat dispersing unit, a radiating plate(8) is closely connected to the upper portions of the electronic components(6). In addition, in a second heat dispersing unit, an auxiliary radiating plate(10) is separately positioned from the upper portion of the radiating plate(8), and has its upper surface closely connected to the inner portion of the casing(3). Accordingly, the heat dispersion device is easily fabricated by individually installing the plurality of radiating plates, and reliability is improved by easily dispersing heat generated in the inner portion and casing of the adapter. Moreover, temperature deviation of the casing is minimized, and the temperature of the inner portion and surface of the casing is reduced at the same time.
Patent KR-20000011412-A (KR)
Inventor: SCHULTZ ROSE ANN
IPC: C09J167/06
Filed: 1999-07-01
Abstract: PURPOSE: Allylated amide compounds and adhesive compositions containing the compounds are provided, by which prepared adhesive is easily dispensable and reworkable and used for the preparation of electronic assembly. CONSTITUTION: The allylated amide compounds are represented by the formula 1 or the formula 2. The curable adhesive composition comprises: 1) the allylated amide compound, a curing initiator selected from the group consisting of a free-radical initiator and a photoinitiator, optionally a filler, and optionally an adhesion promoter; or 2) the allylated amide compound, a curing initiator selected from the group consisting of a cationic initiator and an anionic initiator, optionally a filler, and optionally an adhesion promoter. The composition can further contain a compound represented by the formula 3 and/or a compound represented by the formula 4. The suitable filler is silver, copper, gold, palladium and platinum.
Patent KR-20010008569-A (KR)
Inventor: KIM GYU WON
IPC: A61K31/66
Filed: 1999-07-02
Abstract: PURPOSE: An angiogenesis promoter containing sphingosine 1-phosphate as active ingredient is provided, which promotes an angiogenesis by binding with a cell receptor that exists in a vascular endothelial cell in vivo and in vitro. CONSTITUTION: In vascular endothelial cell, EDG-1 is expressed more prevalently than EDG-3 and EDG-5, that means the vascular endothelial cell responds to sphingosine 1-phosphate. As the concentration of S1P increases, the mobility of the vascular endothelial cell increases as well. When treating the vascular endothelial cell with sphingosine, C2-ceramide, and lysophosphatidic acid, the mobility of vascular endothelial cell does not show change. An angiogenesis promoter is characterized by comprising sphingosine 1-phosphate as active ingredient and pharmaceutically acceptable carrier and by being used as therapeutic agents for burn, rheumatoid arthritis, ulcer, arteriosclerosis, myocardial infarction and the like.
Patent KR-20010009175-A (KR)
Inventor: JANG HYEON YU
IPC: A01G1/04
Filed: 1999-07-08
Abstract: PURPOSE: New strain of Phellinus lintenus, Phellinus lintenus Andong1(KCTC 8936P) and artificial culture method of Phellinus lintenus using the strain are provided to get the mushroom having the same shape and color as domestic natural Phellinus lintenus. CONSTITUTION: The Phellinus lintenus is produced by the steps of : (i) putting a piece of mulberry tree in a vinyl bag and sealing the bag ; (ii) sterilizing and cooling the vinyl bag having the mulberry piece ; (iii) inoculating the strain, Phellinus lintenus Andong1(KCTC 8936P) to the sterilized mulberry piece and culturing the tree piece at 21-23deg.C for 50-60days ; (iv) removing the vinyl bag and a film of mycelium from the mulberry piece and planting the mulberry piece in the soil containing a water content of more than 90% ; and then (v) supplying water of 80-85% to the soil and maintaining the ground temperature of 25-28deg.C and the aboveground temperature of 28-31deg.C to germinate and grow the Phellinus lintenus.
Patent KR-20010010657-A (KR)
Inventor: LEE CHAN GYU
IPC: C01G49/02
Filed: 1999-07-21
Abstract: PURPOSE: A manufacturing method of monophase Fe, FeO or Fe2O3 from waste iron oxides is provided, which recycles resources and prevents environmental pollution by controlling O2 partial pressure(PO2) and thermal treating. CONSTITUTION: The manufacturing method comprises the steps of: sieving waste iron oxides such as Fe, FeO, Fe2O3 and Fe3O4 for removing impurities and classifying the powder; drying; heat-treating and controlling the partial pressure of O2 gas, that is, 10-24≤PO2≤10-10 at 700-1400deg.C for less than 48hrs. for monophase Fe, 10-22≤PO2≤10-7 at 700-1400deg.C for less than 48hrs. for monophase FeO, 10-14≤PO2≤10+5 at 600-1500deg.C for less than 48hrs. for monophase Fe2O3.
Patent KR-19990073548-A (KR)
Title: 하우스용 단면 단열재
IPC: A01G9/24
Filed: 1999-07-22
Abstract: 본 발명은 각종 농작건축물(예를 들면; 비닐하우스, 유리온실 등)의 내부 보온재(커텐용, 수경재배용 등)와, 텐트후라이나 천막 및 자동차카바로 사용되는 하우스용 단면 단열재에 관한 것이다. 본 단면 단열재는 최상단으로부터 필름지와, 알루미늄지와, 산화방지 접착층과, 필름지와, 특수접착층과, 직조섬유를 순차적으로 접착시켜 보온성과 내구성을 이루고, 상기 알루미늄지는 소정간격을 갖는 알루미늄층을 중심으로 사방 또는 불규칙하게 형성된 채광공간을 형성하고, 상기 직조섬유 상단에 적층된 필름지와, 알루미늄지와, 산화방지 접착층과, 필름지와 특수접착층은 소정의 간격으로 적층되어 배수가 이루어지도록 구성되거나 상기 알루미늄지가 채광을 이루는 채광공간을 갖도록 구성되는 특징을 갖고 있다. 이에 따라 알루미늄에 의한 열반사로 보온성이 양호토록 하면서 직조섬유를 적용하므로 얇고, 가볍고, 질겨 내구성이 있도록 생산하며, 직조섬유 위에 필름과 알루미늄층을 일정한 간격으로 띄워 접착하여서 통풍과 차광이 되어 작물의 성장효과를 증대하며, 단열재로 이루어지는 농작건축물에 설치된 커텐의 주름형상이 미려하도록 하면서, 또한 상층부의 습기로 인한 물기를 단열재에 마련된 각각의 부재 간격사이로 배수하여 물기의 무게로 인한 커텐의 처짐현상을 방지하는 등 경제적이면서 안전하고 미려한 사용을 이루게 하면서 광선을 요하는 작물재배시 채광된 광선을 주사하여 작물육성을 활성화 함으로 양질의 작물을 재배하는 효과가 제공된다.
Patent KR-19990073601-A (KR)
IPC: C12N1/20
Filed: 1999-07-28
Abstract: 본 발명은 토양으로부터 분리한 신규 패니바실러스 속(Paenibacillus sp.) 균주, 그로부터 생산되는 균체외 다당 및 이를 포함하는 시멘트 혼합물용 첨가제에 관한 것으로, 구체적으로 토양으로부터 분리한 본 발명의 패니바실러스 속 WN9 균주는 분자량 약 3150만인 균체외 다당을 생산하고, 상기 균체외 다당은 온도 및 pH의 변화에도 안정한 점성을 유지하는 특성이 있어 이를 시멘트 혼합물의 재료분리를 방지하고 물성을 개선하는 시멘트 혼합물용 첨가제로 이용하는 용도에 관한 것이다.
Patent KR-20010007637-A (KR)
Inventor: PARK SANG KYU
IPC: A61N5/06
Filed: 1999-08-04
Abstract: PURPOSE: A thermo bed for treating is provided, which does the finger-pressure therapy and heat therapy to the whole patient's body orderly and automatically, keeps the patient's body warm while treating, and could be folded into a half so that it is easy to carry. CONSTITUTION: The thermo bed for treating is characterized by being comprised of an upper mat which is comprised of: a dent part(4) for holding a heat-treating device(10) having a hole(5) for making it lifted by a movable lifting device(6), having a location-controlling sensor(11) for the movable lifting device(6) at both end; and the heat-treating device(10) with a plurality of a peak(103) for pressing body having an infrared rays-lamp at its bottom and a device(7) for connecting a plurality of the heat-treating device(10), a lower mat comprised of the movable lifting device(6), moved by a device for moving power(8), and a frame having a part(9) for controlling moving and the temperature of the heat-treating device(10) at one side
Patent KR-20010016866-A (KR)
Inventor: CHO SUN JAE
IPC: G06T1/00
Filed: 1999-08-04
Abstract: PURPOSE: A method for inserting and detecting a watermark for protecting CONSTITUTION: A watermark which is a pseudo-random number is generated. According to a watermarking region(space or frequency region), an original image or converted image is scanned to generate an one-dimensional signal. The signals are classified by magnitude to reduce distribution. In addition, in order to insert the watermarks into the classified signals, the watermarks are classified by order. Thereafter, direct current elements of the classified signals of each class are removed. The watermarked signals are obtained from the classified signals and watermarks. When the watermarking region is a frequency region, inverse scanning and transforming processes are performed. When the watermarking region is a space region, the inverse scanning process is performed. Thus, a watermarked image is formed. A test image is converted into the watermark-inserted region, and the converted signal is scanned to an one-dimensional signal. The test image is classified into classes by using the information from the original image. A detection response is obtained from the classified signals and watermarks. Then, existence or absence of the watermark is confirmed by comparing the detection response with a threshold value.