English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Forward Motion Compensation (FMC) systems have been designed to ensure the radiometric quality of motion acquisition in\udairborne cameras. If the radiometric benefits of FMC have been acknowledged, what are its effects on the geometrical properties of\udthe camera? This paper demonstrates that FMC significantly improves geometrical properties of a camera. Aspects of FMC theory\udare discussed, with a focus on the near-lossless implementation of this technology into digital aerial camera systems. Among\udmechanical FMC technologies, the piezoelectric drive is proving to excel in dynamic positioning in both accuracy and repeatability.\udThe patented piezoelectric drive integrated into Optech aerial camera systems allows for continuous and precise sensor motion to\udensure exact compensation of the aircraft's forward motion. This paper presents findings that demonstrate the validity of this\udassertion. The paper also discusses the physical principles involved in motion acquisition. Equations are included that define the\udmotion effect at image level and illustrate how FMC acts to prevent motion effects. The residual motion effect or compensation error\udis formulated and a practical computation applied to the more restrictive camera case. The assessment concludes that, in the range of\udairborne camera utilization, the mechanical FMC technique is free of "visible" error at both human eye and computer assessment\udlevel. Lastly, the paper proceeds to a detailed technical discussion of piezoelectric drives and why they have proven to be so effective\udas nanopositioning devices for optical applications. The effectiveness of the patented piezoelectric drives used to achieve FMC in\udOptech cameras is conclusively demonstrated

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

GEOMETRIC PROPERTIES OF A MECHANICAL FORWARD MOTION COMPENSATION SYSTEM CONTROLLED BY A PIEZOELECTRIC DRIVE