Low power designs in cmos digital imaging systems

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dc.contributor.advisorYadid-Pecht, Orly
dc.contributor.authorGao, Qing
dc.date.accessioned2017-12-18T22:35:18Z
dc.date.available2017-12-18T22:35:18Z
dc.date.issued2012
dc.descriptionBibliography: p. 80-82en
dc.description.abstractFirst, a low power imager with dual analog power supply 1.8V and 1.1 V during integration and readout stages is proposed. The supply voltage for each 8x8 block depends on the estimated variance within the block. The imager is more efficient for predominant-background pictures. According to simulation, up to 37% of power consumption can be saved while PSNR loss is less than 1.5 dB. Then, a low power CMOS imaging system with "smart" image capture and adaptive complexity 2D-DCT calculation is proposed. The DCT calculation has adaptive complexity according to block types estimated during image capture. The image sensor with block type decision circuit is implemented in TSMC 0.18 ?m technology. The adaptive complexity 2DDCT calculation is implemented based on Cyclone EP1C20F400C8 device. Up to 46% of the power can be saved during compression for predominant-background images, while no extra image quality degradation occurs comparing with traditional compressions.
dc.format.extentix, 82 leaves : ill. ; 30 cm.en
dc.identifier.citationGao, Q. (2012). Low power designs in cmos digital imaging systems (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/4945en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/4945
dc.identifier.urihttp://hdl.handle.net/1880/105946
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titleLow power designs in cmos digital imaging systems
dc.typemaster thesis
thesis.degree.disciplineElectrical and Computer Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 2107 627942977
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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