Autofocus method in thermal cameras based on image histogram

dc.citation.epage465en_US
dc.citation.spage462en_US
dc.contributor.authorTurgay, E.en_US
dc.contributor.authorTeke, Oğuzhanen_US
dc.coverage.spatialAntalya, Turkeyen_US
dc.date.accessioned2016-02-08T12:19:35Z
dc.date.available2016-02-08T12:19:35Z
dc.date.issued2011en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionDate of Conference: 20-22 April 2011en_US
dc.descriptionConference Name: 19th Signal Processing and Communications Applications Conference, SIU 2011en_US
dc.description.abstractIn this paper, a new histogram based auto-focusing method for thermal cameras is proposed. This proposed method is realized by FPGA (Field Programmable Gate Array) and DSP (Digital Signal Processor) working together and simultaneously. HF (High Frequency) component, obtained from real-time image flow by FPGA and DSP is used for auto-focusing process. Proposed method is able to determine the focus direction from the HF component produced in the process of histogram equalization by FPGA, unlike Fourier transform and pixel differenve based methods in the literature. With this superiority, proposed method requires no extra calculation for thermal cameras for which histogram equalization is necessary. Analysis show that proposed method is successful on the simulations and scanning thermal cameras.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T12:19:35Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2011en
dc.identifier.doi10.1109/SIU.2011.5929687en_US
dc.identifier.urihttp://hdl.handle.net/11693/28400
dc.language.isoTurkishen_US
dc.publisherIEEEen_US
dc.relation.isversionofhttps://doi.org/10.1109/SIU.2011.5929687en_US
dc.source.titleProceedings of the 19th Signal Processing and Communications Applications Conference, SIU 2011en_US
dc.subjectAuto-focusen_US
dc.subjectAuto-focusingen_US
dc.subjectHigh frequencyen_US
dc.subjectHistogram equalizationsen_US
dc.subjectImage histogramsen_US
dc.subjectReal-time imagesen_US
dc.subjectThermal cameraen_US
dc.subjectDigital signal processorsen_US
dc.subjectField programmable gate arrays (FPGA)en_US
dc.subjectFourier transformsen_US
dc.subjectGraphic methodsen_US
dc.subjectSignal processingen_US
dc.subjectCamerasen_US
dc.titleAutofocus method in thermal cameras based on image histogramen_US
dc.title.alternativeTermal kameralarda histogram tabanlı otofokuslama yöntemien_US
dc.typeConference Paperen_US

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