PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING
May 2020
263
ASPRS gave out over twenty awards,
scholarships, and citations for a variety
of accomplishments. See this year’s
winners, and learn how to apply for
future scholarships.
PHOTOGRAMME TR I C ENG I NE ER I NG & REMOT E SENS I NG
The official journal for imaging and geospatial information science and technology
May 2020 Volume 86 Number 5
Stephane Bertin, Benjamin Levy, Trevor Gee,
and
Patrice Delmas
Unmanned aerial systems (UAS) and structure-from-motion photogrammetry are
transforming the way we produce topographic data, with applications covering many
disciplines in the geosciences, including coastal studies. To overcome limitations of
ground control points (GCPs), we evaluate direct georeferencing (DG) of consumer UAS
imagery for the cost-effective measurement of beach topography. A low-quality global
navigation satellite system onboard a consumer UAS remains the main constraint
on measurement quality. We show how independent topographic data sets, which
are increasingly available world-wide, can improve measurement quality, and hence
change detection capacity.
X. Wang
and
C. Heipke
Recently, global structure from motion has successfully gained many followers, mainly
because of its computational speed. Most of these global methods take the parameters
of relative orientation (ROs) as input and then perform averaging operations. Therefore,
eliminating incorrect ROs is of great significance for improving the robustness of global
structure from motion. In this article, we propose a method to eliminate wrong ROs
which have resulted from repetitive structure and very short baselines. We present two
corresponding criteria that indicate the quality of ROs. By analyzing these two criteria,
we detect and eliminate incorrect ROs.
Xiaohua Li, Hao Chen, Jiliu Zhou,
and
Yuan Wang
This article presents a novel strategy for improving the well-established component
substitution-based multispectral image fusion methods. The main cause of spectral
distortion is analyzed and discussed based on the component substitution method’s
general model.
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COLUMNS
This month we look at the Portuguese Republic.
ANNOUNCEMENTS
Join us in welcoming our newest members to ASPRS.
DEPARTMENTS
By Gert Riemersma, CTO, Routescene
FEATURE
