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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The application of consumer-grade cameras for photogrammetric measurement has traditionally been subject to the requirement that\udimagery is recorded at fixed zoom and focus settings. The camera is then metrically calibrated, usually via self-calibration, for the\udlens setting employed. This requirement arises since camera parameters, and especially principal distance and lens distortion\udcoefficients, vary significantly with zoom/focus setting. A recently developed process, titled zoom-dependent (Z-D) calibration,\udremoves the necessity for the zoom setting to be fixed during the image capture process. Implementation of Z-D calibration requires\udthat the camera be pre-calibrated at four or more focal settings within the zoom range, nominally at shortest and longest focal lengths,\udand at two mid-zoom settings. This requirement, coupled with issues of data management in carrying different focal settings for\udpotentially every image within a bundle adjustment, has largely accounted for the reason that Z-D calibration has not previously been\udimplemented within COTS software for close-range photogrammetry. The objective of this paper is to describe the practical\udimplementation of Z-D calibration within software, along with its associated workflow, and to discuss issues that impact upon the\udaccuracy, reliability and appropriateness of the technique. Experimental testing is used to highlight the merits and shortcomings of ZD\udcalibration

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

IMPLEMENTATION OF ZOOM-DEPENDENT CAMERA CALIBRATION IN CLOSE-RANGE PHOTOGRAMMETRY