Airborne LiDAR technology: A review of data collection and processing systems

B Lohani, S Ghosh - Proceedings of the National Academy of Sciences …, 2017 - Springer
Airborne light detection and ranging (LiDAR) has now become industry standard tool for
collecting accurate and dense topographic data at very high speed. These data have found …

[PDF][PDF] BarChartAnalyzer: Digitizing Images of Bar Charts.

K Dadhich, SC Daggubati, J Sreevalsan-Nair - IMPROVE, 2021 - scitepress.org
Charts or scientific plots are widely used visualizations for efficient knowledge dissemination
from datasets. However, these charts are predominantly available in image format. There …

Tensor fields for data extraction from chart images: bar charts and scatter plots

J Sreevalsan-Nair, K Dadhich… - Topological Methods in …, 2021 - Springer
Charts are an essential part of both graphicacy (graphical literacy), and statistical literacy. As
chart understanding has become increasingly relevant in data science, automating chart …

Contour extraction in buildings in airborne lidar point clouds using multiscale local geometric descriptors and visual analytics

J Sreevalsan-Nair, A Jindal… - IEEE Journal of Selected …, 2018 - ieeexplore.ieee.org
Topographic Light Detection and Ranging (LiDAR) captures geometric information of the
topography of a geographical region, often using airborne platforms. The research and …

ScatterPlotAnalyzer: digitizing images of charts using tensor-based computational model

K Dadhich, SC Daggubati… - … on Computational Science, 2021 - Springer
Charts or scientific plots are widely used visualizations for efficient knowledge dissemination
from datasets. Nowadays, these charts are predominantly available in image format in print …

Adaptive multiscale feature extraction in a distributed system for semantic classification of airborne LiDAR point clouds

S Singh, J Sreevalsan-Nair - IEEE Geoscience and Remote …, 2021 - ieeexplore.ieee.org
Multiple spatial scales have been used extensively for feature extraction from light detection
and ranging (LiDAR) point clouds. These features have been used for semantic …

Using gradients and tensor voting in 3D local geometric descriptors for feature detection in airborne lidar point clouds in urban regions

J Sreevalsan-Nair, A Jindal - 2017 IEEE International …, 2017 - ieeexplore.ieee.org
Structural or geometric classification of three-dimensional (3D) point clouds of urban regions
from airborne LiDAR enables feature (object-based) classification, and 3D reconstruction …

A distributed system for multiscale feature extraction and semantic classification of large-scale LiDAR point clouds

S Singh, J Sreevalsan-Nair - 2020 IEEE India Geoscience and …, 2020 - ieeexplore.ieee.org
Managing and processing large-scale point clouds are much needed for the exploration and
contextual understanding of the data. Hence, we explore the use of a widely used big data …

Visual Analytics of Three-Dimensional Airborne LiDAR Point Clouds in Urban Regions

J Sreevalsan-Nair - … , Applications and Technologies: India Case Studies, 2018 - Springer
Airborne LiDAR datasets, in the form of three-dimensional point clouds, provide geometric
information, owing to their spatial nature. Their popularity as a geospatial data acquisition …

Influence of aleatoric uncertainty on semantic classification of airborne LiDAR point clouds: A case study with random forest classifier using multiscale features

J Sreevalsan-Nair, P Mohapatra - IGARSS 2020-2020 IEEE …, 2020 - ieeexplore.ieee.org
For semantic classification of LiDAR point clouds, the features derived from the local
geometric descriptors are routinely used as features in (supervised) learning algorithms. In …