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Items for "photogrammetry"

Analysis of fetal breathing movements at 30–38 weeks of gestation

Aims: This study reports the changes in patterns of fetal breathing movements recorded with a photogrammetric method in three successive periods of gestation.

Methods: Respiratory movements were studied in fetuses of 28 healthy women with uncomplicated pregnancies of 30–38 weeks of gestation...

Keywords: Fetal breathing movements, photogrammetry, ultrasonography

01/2005 | Journal of Perinatal Medicine, Walter de Gruyter

Photogrammetric fingerprint unwrapping

Fingerprints are important biometric cues. Compared to conventional fingerprint sensors the use of contact-free stereoscopic image acquisition of the front-most finger segment has a set of advantages: Finger deformation is avoided, the entire relevant area for biometric use is covered, some technical aspects like sensor maintenance and cleaning are facilitated, and access to a three-dimensional reconstruction of the covered area is possible.

We describe a photogrammetric workflow for nail-to-nail fingerprint reconstruction: A calibrated sensor setup with typically 5 cameras and dedicated illumination acquires adjacent stereo pairs...

Keywords: photogrammetry, biometrics, fingerprint unwrapping, 3D fingerprint, fingertip modeling

01/2008 | Journal of Applied Geodesy, Walter de Gruyter

Vision-aided inertial navigation system for robotic mobile mapping

A mapping system by vision-aided inertial navigation was developed for areas where GNSS signals are unreachable...

Keywords: Inertial system, photogrammetry, Navigation, robotic/mobile mapping system

01/2008 | Journal of Applied Geodesy, Walter de Gruyter

Bewertung von Przision und Genauigkeit der digitalen Oberflchenphotogrammetrie mit dem DSP 400 System / Assessment of Precision and Accuracy of Digital Surface Photogrammetry with the DSP 400 System

Das Ziel der vorliegenden Studie war es, die Przision und Genauigkeit von fazialen, anthropometrischen Messungen mit Hilfe der digitalen 3-D Oberflchenphotogrammetrie mit dem DSP 400 System im Vergleich zur konventionellen 2-D Fotogrammetrie zu bewerten...

Keywords: Photogrammetrie, drei-dimensional, Anthropometrie, photogrammetry, three-dimensional, anthropometry