This article presents a 4D modelling approach that employs multi-temporal and historical aerial images to derive spatio-temporal information for scenes and landscapes. Such imagery represent a unique data source, which combined with photo interpretation and reality-based 3D reconstruction techniques, can offer a more complete modelling procedure because it adds the fourth dimension of time to 3...

Colour aerial photography has the potential to identify and classify the size characteristics of exposed riverbed sediments over large areas efficiently. This paper describes the findings of a pilot project that sought to assess this potential and consider the impact of photo-scale on the accuracy of classifications obtained. Colour multi-scale digital imagery was acquired of a test area (120 x...

Canopy Gaps in an Upper Mississippi River floodplain plot were measured as part of a songbird nest-site selectivity study. Two methods of measuring floodplain forest canopy gaps were compared. One method used a ground crew to sweep the plot and record spatial and botanical information of canopy gaps > 10 meters in diameter. The second method used 1:15,000 scale color infrared stereoscopic aeria...

a three-step selective photo-ionization for gd155 and gd157 isotopes by pulsed laser wasevaluated numerically. due to large thermal neutron absorption cross sections, these two isotopes innatural gadolinium are good candidates as burnable poison to control reactivity early in the fuel cycleand allow extended fuel burn up. rate equations have been used to calculate the dynamics of the isotopepop...

This paper presents the system description and organization of M A P S , the Map Assisted Photo interpretation System, M A P S is a large integrated database system containing high resolution aerial photographs, digitized maps and other cartographic products, combined with detailed 3 0 descriptions of man-made and natural features in ihc Washington D. C. area. A classification of image database...

Josué Alvarez-Borrego CICESE Departamento de Óptica División de Fı́sica Aplicada Km 107 Carretera Tijuana-Ensenada Ensenada 22860, B.C., México Abstract. The Karhunen-Loeve expansion based on the calculation of the eigenvalues and eigenfunctions of the Karhunen-Loeve integral equation is known to have certain properties that make it optimal for many signal detection and filtering applications. W...

Traditional aerial-triangulation has long relied on control points orientating the photo models into a ground-based coordinate system, reducing the distortion effect when tying photos by imperfect photo measurements, and calibrating camera inner parameters. Field surveying preparing for adequate number of control points and manual measurements of the control points afterwards on the photos cost...

Generating a georeferenced mosaic map from unmanned aerial vehicle (UAV) imagery is a challenging task. Direct and indirect georeferencing methods may fail to generate an accurate mosaic map due to the erroneous exterior orientation parameters stored in the inertial measurement unit (IMU), erroneous global positioning system (GPS) data, and difficulty in locating ground control points (GCPs) or...

This paper proposes a method of objects extraction based high and color texture features. Trees or forests are interested objects in this paper, which are higher than their surroundings. According to the disparity image processed, at first, the original color aerial images are segmented into the high and low objects, next, on the basis of preliminary results, the trees are refined by Fuzzy C-Me...