2023 · Surveying & mapping
Enhancing Performance and Evaluating Accuracy of GNSS Positioning for UAV Mapping
Compares onboard RTK, post-processed kinematic and precise-point-positioning workflows for UAV mapping using ground checkpoints.
Research for
Infrastructure.
From field measurements and laboratory experiments to engineering models and AI. Explore the work behind our infrastructure.
Explore all publications ↗
Seeing the assets along our roads
2022 · Vision Transformer + YOLOX + FPN
A road-asset detector combines a pretrained Vision Transformer with YOLOX and a feature-pyramid decoder. The study evaluates detection on Thai highway imagery, including small roadside objects such as kilometer stones.
Phisan Santitamnont & coauthors
Inside the model
- Input
Thai highway images
- Model
Vision Transformer + YOLOX + FPN
- Output
Road-asset detections
Evaluated against YOLOv5 variants on the Thai highway corpus.
YOLOX · upstream code ↗
Base detector by the YOLOX authors; this is not the Thai-highway study’s implementation.
Code & model availability
Published method. A dedicated code repository and downloadable weights have not been verified.
Publication source ↗
Learning from highway crash records
2025 · VGG-based CNN + Bayesian optimization
This study transforms discrete crash features into grayscale images using Weight of Evidence, then trains a VGG-based neural network to classify accident severity. It uses Thai highway crash records from 2011–2023.
Kasem Choocharukul & coauthors
Inside the model
- Input
Crash-record features encoded as images
- Model
VGG-based CNN + Bayesian optimization
- Output
Accident-severity classification
Evaluated with F1-score and AUC, with Bayesian hyperparameter optimization.
Code & model availability
Published method. Public code and weights have not been verified. The authors state that they do not have permission to share the data.
Publication source ↗
Mapping buildings with GeoSAM
2024 · Geospatial Segment Anything Model (GeoSAM)
Researchers applied GeoSAM to extract building footprints from UAV true orthophotos with a 5 cm ground sampling distance. The study covers science and engineering areas at Chulalongkorn University.
Phisan Santitamnont & coauthors
Inside the model
- Input
UAV true orthophotos · 5 cm GSD
- Model
Geospatial Segment Anything Model (GeoSAM)
- Output
Building footprints
Compared extracted footprints with manually delineated outlines using Intersection over Union (IoU).
SamGeo · cited software ↗
The paper cites SamGeo (Wu & Osco, 2023). This is the upstream package, not the study’s code or data.
Code & model availability
Published application of GeoSAM. A study-specific repository and downloadable weights have not been verified.
Publication source ↗
Finding text in complex scenes
2020 · ResNet-50 + FPN
A convolutional network predicts text, offset and border masks to locate curved and closely spaced text. Polygon offsetting and border augmentation help separate neighboring text instances in natural images.
Thanarat Chalidabhongse & coauthors
Inside the model
- Input
Natural-scene images
- Model
ResNet-50 + FPN
- Output
Text-region polygons
Evaluated on ICDAR 2015, 2017-MLT, 2019-MLT and Total-Text benchmarks.
Code & model availability
Published method. Public code and downloadable weights have not been verified.
Publication source ↗These are published studies by researchers in the directory. Publication years and authorship follow the original papers.
Engineering beyond AI
Field measurements, experiments and analytical models across six areas.
2021 · Bridges & structural response
Vehicle Axle Load Identification Using Extracted Bridge Influence Line via Updated Static Component Technique
Combines a measured bridge influence line with iterative load estimation. Simulations and scaled experiments assess accuracy under road roughness and measurement noise.
2013 · Geotechnical engineering
Small strain stiffness and stiffness degradation curve of Bangkok Clays
Combines laboratory and field evidence to estimate small-strain stiffness parameters for Bangkok clay, supporting calibrated geotechnical finite-element models.
2018 · Water & environmental systems
A Novel Configuration Fluidized Bed Reactor for Nitrate Reduction and Low Strength Anaerobic Wastewater Treatment
Examines flow behaviour and treatment performance in a fluidised bed reactor, testing nitrate removal and anaerobic treatment of dilute wastewater.
2022 · Pavements & recycled materials
Permanent Deformation Behavior under Repeated Load of Recycled Material Stabilized with Bitumen Emulsion
Repeated-load tests examined permanent deformation in recycled pavement materials treated with bitumen emulsion and cement. The laboratory results offer guidance for designing recycled pavement rehabilitation materials.
2017 · Transport & traffic operations
Traffic Data Analysis on Sathorn Road with Synchro Optimization and Traffic Simulation
Field data from Bangkok’s Sathorn Road were used to model signal timing and reversible-lane operations in Synchro. The study compared proposed timings with observed police-operated signals to assess travel-time changes.
Topic illustrations explain the subject; they are not experimental figures. Each title links to the original publication.
Explore all 77 selected publications ↗Code you can explore
Public repositories linked to studies in the researcher portfolios.
2025 · Thanarat Chalidabhongse
HER2 · Uncertainty-aware classification
Medical-imaging collaboration. Feature extraction, classifier training and analysis notebooks. MIT license.
2023 · Phisan Santitamnont
UAV mapping · GNSS processing
Scripts for precise UAV positioning, including PPK antenna-to-camera offset processing.
Explore the wider research
Find publications across transport, structures, water, geospatial engineering and computing.
Boonchai Sangpetngam8 selected works ↗Supot Teachavorasinskun7 selected works ↗Suebskul Phiphobmongkol6 selected works ↗Chaiyaporn Puprasert7 selected works ↗Tospol Pinkaew7 selected works ↗Kasem Choocharukul8 selected works ↗Phisan Santitamnont8 selected works ↗Nakhon Kokkaew7 selected works ↗Thanarat Chalidabhongse8 selected works ↗Jittichai Rudjanakanoknad7 selected works ↗Teetat Charoenkalunyuta6 selected works ↗
More applied research & road-safety activities
2023 · Conference paper
Estimation of Highway Maintenance Cost due to Heavy Truck Traffic
Co-authored by Boonchai Sangpetngam · NCCE 28
The study used HDM-4 and data from Highway 344 to model pavement deterioration and maintenance costs over 20 years under four truck categories.
NCCE 28 · 9 July 2023 ↗2023 · Conference paper
Development of Model for Predicting the Flexible Pavement Strength
Co-authored by Boonchai Sangpetngam · NCCE 28
The proceedings list research on flexible pavement strength, deflection, structural number and prediction models. The source provides a downloadable paper; its web abstract is not supplied.
NCCE 28 · 9 July 2023 ↗2025 · Research translation & road safety
ThaiRAP road assessment and capacity building
Kasem Choocharukul · ThaiRAP / Faculty of Engineering, Chulalongkorn University
iRAP's January 2025 report identifies Kasem Choocharukul as ThaiRAP lead and describes road assessment and training with the Bangkok Metropolitan Administration. This is a programme activity record, not a journal publication.
iRAP · 22 January 2025 ↗Sources checked 8 September 2026. The directory is historical; current center projects and membership require separate confirmation.