New Open Source Software for High Resolution Microscopy

2016 ◽  
Vol 11 (3) ◽  
pp. 18-18
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
High Resolution Microscopy

scholarly journals Mapping of land cover with open‐source software and ultra‐high‐resolution imagery acquired with unmanned aerial vehicles

2020 ◽  
Vol 6 (4) ◽  
pp. 487-497 ◽  
Author(s):  
Ned Horning ◽  
Erica Fleishman ◽  
Peter J. Ersts ◽  
Frank A. Fogarty ◽  
Martha Wohlfeil Zillig
Keyword(s):  
High Resolution ◽  
Land Cover ◽  
Unmanned Aerial Vehicles ◽  
Open Source ◽  
Open Source Software ◽  
Aerial Vehicles ◽  
High Resolution Imagery

scholarly journals UPGRADE OF FOSS DATE PLUG-IN: IMPLEMENTATION OF A NEW RADARGRAMMETRIC DSM GENERATION CAPABILITY

2016 ◽  
Vol XLI-B7 ◽  
pp. 821-825 ◽  
Author(s):  
M. Di Rita ◽  
A. Nascetti ◽  
F. Fratarcangeli ◽  
M. Crespi
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
Weather Conditions ◽  
Ground Sample ◽  
Satellite Systems ◽  
Stereo Reconstruction ◽  
First Results ◽  
Sar Imagery ◽  
University Of Rome

Synthetic Aperture Radar (SAR) satellite systems may give important contribution in terms of Digital Surface Models (DSMs) generation considering their complete independence from logistic constraints on the ground and weather conditions. In recent years, the new availability of very high resolution SAR data (up to 20 cm Ground Sample Distance) gave a new impulse to radargrammetry and allowed new applications and developments. Besides, to date, among the software aimed to radargrammetric applications only few show as free and open source. It is in this context that it has been decided to widen DATE (Digital Automatic Terrain Extractor) plug-in capabilities and additionally include the possibility to use SAR imagery for DSM stereo reconstruction (i.e. radargrammetry), besides to the optical workflow already developed. <br><br> DATE is a Free and Open Source Software (FOSS) developed at the Geodesy and Geomatics Division, University of Rome “La Sapienza”, and conceived as an OSSIM (Open Source Software Image Map) plug-in. It has been developed starting from May 2014 in the framework of 2014 Google Summer of Code, having as early purpose a fully automatic DSMs generation from high resolution optical satellite imagery acquired by the most common sensors. <br><br> Here, the results achieved through this new capability applied to two stacks (one ascending and one descending) of three TerraSAR-X images each, acquired over Trento (Northern Italy) testfield, are presented. Global accuracies achieved are around 6 metres. These first results are promising and further analysis are expected for a more complete assessment of DATE application to SAR imagery.

Open-Source Software for Crop Physiological Assessments Using High Resolution RGB Images

2020 ◽  
Author(s):  
Shawn C. Kefauver ◽  
Adrian Gracia Romero ◽  
Ma. Luisa Buchaillot ◽  
Omar Vergara-Diaz ◽  
Jose A. Fernandez-Gallego ◽  
...  
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
Rgb Images

scholarly journals UPGRADE OF FOSS DATE PLUG-IN: IMPLEMENTATION OF A NEW RADARGRAMMETRIC DSM GENERATION CAPABILITY

2016 ◽  
Vol XLI-B7 ◽  
pp. 821-825
Author(s):  
M. Di Rita ◽  
A. Nascetti ◽  
F. Fratarcangeli ◽  
M. Crespi
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
Weather Conditions ◽  
Ground Sample ◽  
Satellite Systems ◽  
Stereo Reconstruction ◽  
First Results ◽  
Sar Imagery ◽  
University Of Rome

Synthetic Aperture Radar (SAR) satellite systems may give important contribution in terms of Digital Surface Models (DSMs) generation considering their complete independence from logistic constraints on the ground and weather conditions. In recent years, the new availability of very high resolution SAR data (up to 20 cm Ground Sample Distance) gave a new impulse to radargrammetry and allowed new applications and developments. Besides, to date, among the software aimed to radargrammetric applications only few show as free and open source. It is in this context that it has been decided to widen DATE (Digital Automatic Terrain Extractor) plug-in capabilities and additionally include the possibility to use SAR imagery for DSM stereo reconstruction (i.e. radargrammetry), besides to the optical workflow already developed. <br><br> DATE is a Free and Open Source Software (FOSS) developed at the Geodesy and Geomatics Division, University of Rome “La Sapienza”, and conceived as an OSSIM (Open Source Software Image Map) plug-in. It has been developed starting from May 2014 in the framework of 2014 Google Summer of Code, having as early purpose a fully automatic DSMs generation from high resolution optical satellite imagery acquired by the most common sensors. <br><br> Here, the results achieved through this new capability applied to two stacks (one ascending and one descending) of three TerraSAR-X images each, acquired over Trento (Northern Italy) testfield, are presented. Global accuracies achieved are around 6 metres. These first results are promising and further analysis are expected for a more complete assessment of DATE application to SAR imagery.

Ultrasound speckle tracking to detect vascular distensibility changes from angioplasty and branch ligation in a radio-cephalic fistula: Use of novel open source software

2020 ◽  
pp. 112972982095991
Author(s):  
William F Weitzel ◽  
Nirmala Rajaram ◽  
Yihao Zheng ◽  
Brian J Thelen ◽  
Venkataramu N Krishnamurthy ◽  
...  
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
Vessel Wall ◽  
Speckle Tracking ◽  
Wall Motion ◽  
Wide Range ◽  
Before And After ◽  
Conventional Ultrasound ◽  
Duplex Doppler

We used novel open source software, based on an ultrasound speckle tracking algorithm, to examine the distensibility of the vessel wall of the inflow artery, anastomosis, and outflow vein before and after two procedures. An 83-year-old white man with a poorly maturing radio-cephalic fistula received an angioplasty at the anastomosis followed by branch ligation 28 days later. Duplex Doppler measurements corroborated the blood flow related changes anticipated from the interventions. The experimental distensibility results showed that it is technically feasible to measure subtle vessel wall motion changes with high resolution (sub-millimeter) using standard Digital Imaging and Communications in Medicine (DICOM) ultrasound data, which are readily available on conventional ultrasound scanners. While this methodology was originally developed using high resolution radiofrequency from ultrasound data, the goal of this study was to use DICOM data, which makes this technology accessible to a wide range of users.

scholarly journals A Generalized Framework for Measuring Pedestrian Accessibility around the World Using Open Data

2021 ◽  
Author(s):  
Shiqin Liu ◽  
Carl Higgs ◽  
Jonathan Arundel ◽  
Geoff Boeing ◽  
Nicholas Cerdera ◽  
...  
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
Spatial Data ◽  
City Planning ◽  
Open Data ◽  
Urban Transport ◽  
Local Planning ◽  
Generalized Framework ◽  
Pedestrian Accessibility

Pedestrian accessibility is an important factor in urban transport and land use policy and critical for creating healthy, sustainable cities. Developing and evaluating indicators measuring inequalities in pedestrian accessibility can help planners and policymakers benchmark and monitor the progress of city planning interventions. However, measuring and assessing indicators of urban design and transport features at high resolution worldwide to enable city comparisons is challenging due to limited availability of official, high quality, and comparable spatial data, as well as spatial analysis tools offering customizable frameworks for indicator construction and analysis. To address these challenges, this study develops an open source software framework to construct pedestrian accessibility indicators for cities using open and consistent data. It presents a generalized method to consistently measure pedestrian accessibility at high resolution and spatially aggregated scale, to allow for both within- and between-city analyses. The open source and open data methods developed in this study can be extended to other cities worldwide to support local planning and policymaking. The software is made publicly available for reuse in an open repository.

scholarly journals ACYOTB Plugin: Tool for Accurate Orthorectification in Open-Source Environments

2019 ◽  
Vol 9 (1) ◽  
pp. 11 ◽  
Author(s):  
Valerio Baiocchi ◽  
Francesca Giannone ◽  
Felicia Monti ◽  
Felicia Vatore
Keyword(s):  
High Resolution ◽  
Open Source ◽  
Open Source Software ◽  
Satellite Images ◽  
Polynomial Function ◽  
Full Potential ◽  
Rational Polynomial ◽  
High Resolution Satellite Images ◽  
Image Position ◽  
Rectification Process

High-resolution satellite images must undergo a geometric rectification process in order to be used for metrical purposes. This operation, called orthorectification, is necessary because of deformations mainly due to camera distortions and acquisition geometry. To correctly orthorectify an image, it is necessary to accurately reconstruct the photogrammetric-acquisition characteristics and the image position with respect to a reference system connected to the ground. This operation, called orientation, can be done using various mathematical models such as rigorous, rational polynomial function (RPF), and rational polynomial coefficient, or, according to some authors, rapid positioning coefficient (RPC) models. Orientation and orthorectification are usually performed within specific commercial software, but in QGIS, these complex operations can be performed using the open libraries of the Orfeo Tool Box (OTB). Unfortunately, instructions given by OTB developers lead to scarce results. In fact, the procedure proposed in OTB does not allow for the full exploitation of the potential of RPC models, on which OTB itself is based. As OTB is open-source software, a plugin was developed to overcome these limitations and exploit its full potential. In fact, OTB interfaces are unfortunately essential, and some necessary functions are missing. Therefore, a new QGIS plugin was developed in order to run the entire process in the most photogrammetrically and statistically correct way, and, at the same time, to simplify the relative procedures.

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