Patents by Inventor Joong-Ki Park
Joong-Ki Park has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230116262Abstract: Disclosed herein an apparatus and method for estimating a phase retarder and method of manufacturing the phase retarder using the same. The apparatus includes: a polarization element configured to output an incident light as a linear polarization and to make the linear polarization incident onto a phase retarder to be tested; a polarization image acquisition module equipped with a plurality of polarized pixels receiving an emitting light that is output from the phase retarder, on which the linear polarization is incident, and configured to obtain a polarization image based on the emitting light that is modulated in the polarized pixels; and a processor configured to evaluate quality of the phase retarder based on uniformity of a brightness value between polarized pixels of the polarization image. The polarized pixels modulate the emitting light based on a plurality of transmission angles and detects the modulated emitting light.Type: ApplicationFiled: September 6, 2022Publication date: April 13, 2023Inventors: Ki Hong CHOI, Joong Ki PARK, Kee Hoon HONG
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Publication number: 20220397859Abstract: The holographic lens system includes a geometric phase lens located on plane of an aperture, a front lens and a rear lens respectively located at the front and behind of the aperture, a polarizer located between the geometric phase lens and the front lens, and an image sensor that is located behind the rear lens and acquires an interference fringe generated by the geometric phase lens.Type: ApplicationFiled: February 2, 2022Publication date: December 15, 2022Inventors: Kihong CHOI, Keehoon HONG, Joong-Ki PARK
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Publication number: 20220283541Abstract: A holographic camera system includes an imaging lens, a polarizer configured to circularly polarize light incident from the imaging lens, a geometric phase lens with a phase delay of ?/4, and an image sensor configured to replicate an interference pattern through self-interference of light output from the geometric phase.Type: ApplicationFiled: March 4, 2022Publication date: September 8, 2022Inventors: Hak-Rin Kim, Tae-Hyun Lee, Ki Hong Choi, Kee Hoon Hong, Joong Ki Park
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Publication number: 20220260953Abstract: Disclosed herein an apparatus for generating hologram and a method for generating hologram using the same. The apparatus includes: a geometric phase modulator disposed to enable incident light from a target object to pass through and configured to modulate the incident light to a plurality of circular polarizations; an image sensor configured to receive the plurality of circular polarizations and to acquire an interference fringe generated by the plurality of circular polarizations as an image; and a polarization selective element equipped with a liquid crystal element, which controls an output polarization angle of the incident light according to an output polarization signal, and configured to sequentially output the incident light at output polarization angles different from each other.Type: ApplicationFiled: February 17, 2022Publication date: August 18, 2022Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Kyungpook National University Industry-Academic Cooperation FoundationInventors: Ki Hong CHOI, Joong Ki PARK, Kee Hoon HONG, Hak-Rin KIM, Su-Won LEE, Tae-Hyun LEE
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Publication number: 20210319533Abstract: The present disclosure relates to an apparatus, method and system for generating a foveated image. According to the present disclosure, an apparatus for generating a foveated image, the apparatus may comprise a communicator configured to transmit and receive a signal and a processor configured to control the communicator, wherein the processor distinguishes objects comprised in a hologram, which is generated for a front field of view by using input light, selects an object to be targeted among the distinguished objects, and generates a foveated image by using depth information of the targeted object.Type: ApplicationFiled: April 7, 2021Publication date: October 14, 2021Applicant: Electronics and Telecommunications Research InstituteInventors: Ki Hong CHOI, Joong Ki PARK, Han Ju YEOM, Kee Hoon HONG
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Publication number: 20210314546Abstract: The present disclosure relates to an apparatus, method and system for generating a three-dimensional image using a coded phase mask. According to the present disclosure, an apparatus for generating a three-dimensional image, the apparatus may comprise a communicator for transmitting and receiving a signal and a processor for controlling the communicator, wherein the processor synthesizes complex data for an object based on an image, which is obtained by shooting an object, and generates a three-dimensional image of the object based on the complex data for the object and a point spread function (PSF) image for a point light source.Type: ApplicationFiled: April 2, 2021Publication date: October 7, 2021Applicant: Electronics and Telecommunications Research InstituteInventors: Ki Hong CHOI, Joong Ki PARK, Kee Hoon HONG
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Publication number: 20210141339Abstract: Provided is a hologram generation method including receiving a distribution of a polygon and generating an angular spectrum based on the distribution of the polygon, determining whether a rotation angle of the polygon is included in a first section determined based on a maximum diffraction angle of a spatial light modulator, and recording the angular spectrum if it is determined that the rotation angle is included in the first section.Type: ApplicationFiled: November 5, 2020Publication date: May 13, 2021Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang Hoon CHEON, HANJU YEOM, Joong-Ki PARK, Kwan-Jung OH, Keehoon HONG
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Publication number: 20180188686Abstract: A method and an apparatus for hologram resolution transformation are disclosed. A number of pixels for zero padding for an original hologram of a first resolution is calculated based on a wavelength and an imaging distance, and the zero padding is performed on the original hologram of the first resolution based on the number of pixels to obtain the original hologram of a second resolution. Forward propagation is performed on the original hologram of the second resolution by a reconstruction distance to reconstruct a hologram image.Type: ApplicationFiled: December 27, 2017Publication date: July 5, 2018Inventor: Joong-Ki PARK
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Patent number: 9869971Abstract: Provided is a hologram generation method including receiving three-dimensional (3D) data information, determining a first projection position onto which the 3D data information is projected on a hologram plane corresponding to a first spatial light modulator (SLM), and a second projection position onto which the 3D data information is projected on a hologram plane corresponding to a second SLM, generating a first Fresnel zone plate (FZP) pattern corresponding to the first projection position, and determining the first FZP pattern to be an FZP pattern corresponding to the second projection position.Type: GrantFiled: January 4, 2016Date of Patent: January 16, 2018Assignee: Electronics and Telecommunications Research InstituteInventors: Eun Young Chang, Soo Hyun Lee, Jin Woong Kim, Tae One Kim, Kyung Ae Moon, Joong Ki Park
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Publication number: 20160195850Abstract: Provided is a hologram generation method including receiving three-dimensional (3D) data information, determining a first projection position onto which the 3D data information is projected on a hologram plane corresponding to a first spatial light modulator (SLM), and a second projection position onto which the 3D data information is projected on a hologram plane corresponding to a second SLM, generating a first Fresnel zone plate (FZP) pattern corresponding to the first projection position, and determining the first FZP pattern to be an FZP pattern corresponding to the second projection position.Type: ApplicationFiled: January 4, 2016Publication date: July 7, 2016Inventors: Eun Young CHANG, Soo Hyun LEE, Jin Woong KIM, Tae One KIM, Kyung Ae MOON, Joong Ki PARK
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Publication number: 20140211044Abstract: A system for generating crowdsourcing-based image knowledge content, includes an image provision unit configured to provide image data; and an image crowdsourcing unit configured to generate, store, or manage image knowledge in order to provide an image-base knowledge service. Further, the system includes an image acquisition and processing unit configured to connect the image provision unit and the image crowdsourcing unit and actively or automatically provide a crowdsourcing technique.Type: ApplicationFiled: January 10, 2014Publication date: July 31, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Chung-ho LEE, Joong-Ki PARK, YOUNGHO SUH, Youngsu CHO, Sung Woong SHIN, Jong-Hyun PARK, Chae Kyu KIM
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Patent number: 8332069Abstract: An apparatus for performing fault tolerance against a failure occurring during driving robot software components includes: a component executor for executing the robot software components, which are assigned with one thread from an operating system and have a same priority and cycle, by using the assigned thread; and an executor monitor for periodically monitoring the operation of the component executor and determining whether or not there is a failure in the robot software components executed by the component executor. The apparatus further includes: an executor manager for generating the component executor which is assigned with the robot software components having the same priority and cycle and, when the executor monitor determines that there is a failure in the execution of the robot software components, generating a new component executor.Type: GrantFiled: July 26, 2010Date of Patent: December 11, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Choul Soo Jang, Seung-Woog Jung, Byoung Youl Song, Sung Hoon Kim, Joong Bae Kim, Kyeong Ho Lee, Hyun Kyu Cho, Myung Chan Roh, Joong-Ki Park, Chang Eun Lee
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Publication number: 20110153073Abstract: An apparatus for performing fault tolerance against a failure occurring during driving robot software components includes: a component executor for executing the robot software components, which are assigned with one thread from an operating system and have a same priority and cycle, by using the assigned thread; and an executor monitor for periodically monitoring the operation of the component executor and determining whether or not there is a failure in the robot software components executed by the component executor. The apparatus further includes: an executor manager for generating the component executor which is assigned with the robot software components having the same priority and cycle and, when the executor monitor determines that there is a failure in the execution of the robot software components, generating a new component executor.Type: ApplicationFiled: July 26, 2010Publication date: June 23, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Choul Soo Jang, Seung-Woog Jung, Byoung Youl Song, Sung Hoon Kim, Joong Bae Kim, Kyeong Ho Lee, Hyun Kyu Cho, Myung Chan Roh, Joong-Ki Park, Chang Eun Lee
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Publication number: 20110054684Abstract: In an operating system having a first controller configured to manage one or more robots included in a first region, and a second controller configured to manage one or more robots included in a second region adjacent to the first region, a method for enabling the second controller to acquire an operation right of N robots (where N is a natural number equal to or greater than 1) operated by the first controller, the method includes: transmitting a control mapping status (CMS) containing an operation right change message to the first controller, upon reception of an operation right request signal from a user of the N robots; and checking a connection status of the N robots, upon reception of the CMS containing the operation right change message from the first controller, and acquiring an operation right by providing CMS acquisition information and control mapping information to the robots included in the second region.Type: ApplicationFiled: September 1, 2010Publication date: March 3, 2011Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, SAMSUNG THALES CO., LTD.Inventors: Beom-Su SEO, Sung-Hoon KIM, Kyeong-Ho LEE, Joong-Bae KIM, Myung-Chan ROH, Choul-Soo JANG, Seung-Woog JUNG, Seung-Ik LEE, Yoon-Ju LEE, Ji-Hung KIM, Hyun-Chul PARK, Joong-Ki PARK
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Publication number: 20100316039Abstract: An apparatus for generating a ranging code extracts a ranging code in each ranging mode, using a ranging code table storing one period data in bytes of the PN code according to a reference UL PermBase number, and an offset table that stores byte offsets for the start positions of the PN codes of the reference UL PermBase number and the other plurality of UL PermBase numbers and bit offsets in the byte including the start positions, on the basis of the PN code according to the reference UL PermBase number.Type: ApplicationFiled: June 4, 2010Publication date: December 16, 2010Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, SAMSUNG THALES CO., LTD.Inventors: Yoon Ju LEE, Sung Hoon Kim, Jihyung Kim, Beom-Su Seo, Kyeong Ho Lee, Joong Bae Kim, Myung Chan Roh, Choul Soo Jang, Seung-Woog Jung, Seung-Ik Lee, Joong-Ki Park, Chul-Hee Han
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Publication number: 20090165987Abstract: The present invention relates to a continuous casting machine and method using molten mold flux. The continuous casting machine includes a mold cover for covering an upper portion of a mold; a mold flux melting unit for melting mold flux to be supplied into the mold; and a mold flux delivery unit for supplying the mold with the molten mold flux melted in the mold flux melting unit, wherein the delivery unit includes an injection tube with one end connected to the mold flux melting unit and the other end positioned in the mold through the mold cover, and an injection tube heater for heating the injection tube. According to the present invention, since a slag bear continuous casting machine and method using molten mold flux is removed, a consumption of mold flux is greatly increased compared with a case of a conventional casting work, so that the friction between a mold and a solidified shell is reduced. As a result, an amount of scarfing of a cast piece is greatly reduced and no carbon pick-up occurs.Type: ApplicationFiled: June 22, 2007Publication date: July 2, 2009Inventors: Jung Wook Cho, Hyun Seok Jeong, Jong Min Park, Goo Hwa Kim, Oh Duck Kwon, Joong Ki Park, Soo Kyu Lee, Sang Ho Lee, Ki Hyeon Moon
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Publication number: 20090157223Abstract: A robot chatting system includes an interface for generating a chatting text including robot motion having a text part and a motion part; a robot chatting server for providing a robot chatting service between chatting persons, using the chatting text including robot motion; a first unit for generating motion control data corresponding to the motion part of the chatting text including robot motion; a second unit for converting the text part of the chatting text including robot motion into speech data; and a robot for outputting the speech data through a speaker and simultaneously motioning based on the motion control data. Therefore, when the user inputs text and its corresponding motions and sends the input text, the other user's robot reads the text and performs the relevant motions, thereby providing the robot chatting service of good quality.Type: ApplicationFiled: September 12, 2008Publication date: June 18, 2009Applicant: Electronics and Telecommunications Research InstituteInventors: Joong-Ki PARK, Byung Ho Chung, Hyun Sook Cho
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Patent number: 7543047Abstract: Disclosed is a method for data synchronization and update conflict resolution between mobile clients and a server in a mobile system which maintains consistency of data between the clients and the server and enables the clients to continuously perform an effective update operation with respect to objects of the server even in a clients' disconnection state by the mobile clients performing an independent update operation with respect to disjoint fragments and associated objects for a specified object using the structure of the objects and the meaning of applications and then performing the data synchronization and the conflict resolution between the clients and the server during a reconnection operation.Type: GrantFiled: April 25, 2003Date of Patent: June 2, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Joong-Ki Park, Joong Bae Kim, Duk Joo Son
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Publication number: 20070150102Abstract: A method of supporting robot application programming and a programming tool for the same are provided. In the method of supporting robot application programming, behaviors that constitute operations to be performed by a robot are assembled in the programming tool for programming an application program for the operations to be performed by the robot. The method includes: (a) classifying the operations to be performed by the robot by functions of the robot; (b) displaying the behavior of the robot which can constitute one of the functions on a display device in a graphical form with block shapes that can be connected one another visually with a plurality of conditions; and (c) converting a set of the blocks into an XML file, when the function of the robot is constructed as a robot task by the set of blocks in the graphical form.Type: ApplicationFiled: December 7, 2006Publication date: June 28, 2007Inventors: Joong Ki Park, Joong Bae Kim, Woo Young Kwon, Kyeong Ho Lee, Young Jo Cho
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Publication number: 20040122870Abstract: Disclosed is a method for data synchronization and update conflict resolution between mobile clients and a server in a mobile system which maintains consistency of data between the clients and the server and enables the clients to continuously perform an effective update operation with respect to objects of the server even in a clients' disconnection state by the mobile clients performing an independent update operation with respect to disjoint fragments and associated objects for a specified object using the structure of the objects and the meaning of applications and then performing the data synchronization and the conflict resolution between the clients and the server during a reconnection operation.Type: ApplicationFiled: April 25, 2003Publication date: June 24, 2004Inventors: Joong-Ki Park, Joong Bae Kim, Duk Joo Son