Darwin Alexis Arrechea-Castillo

Mr. Darwin Alexis Arrechea-Castillo

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Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 May 2023 in Remote Sensing
Verified
Journal Article
Open access
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DADarwin Alexis Arrechea-Castillo
Darwin Alexis Arrechea-Castillo
YSYady Tatiana Solano-Correa
Yady Tatiana Solano-Correa
JMJulián Fernando Muñoz-Ordóñez
Julián Fernando Muñoz-Ordóñez
EPEdgar Pencue-Fierro
Edgar Pencue-Fierro
AFApolinar Figueroa-Casas
Apolinar Figueroa-Casas
Land Use and Land Cover (LULC) classification using remote sensing data is a challenging problem that has evolved with the update and launch of new satellites in orbit. As new satellites are launched with higher spatial and spectral resolution and shorter revisit times, LULC classification has evolved to take advantage of these improvements. However, these advancements also bring new challenges, such as the need for more sophisticated algorithms to process the increased volume and complexity of data. In recent years, deep learning techniques, such as convolutional neural networks (CNNs), have shown promising results in this area. Training deep learning models with complex architectures require cutting-edge hardware, which can be expensive and not accessible to everyone. In this study, a simple CNN based on the LeNet architecture is proposed to perform LULC classification over Sentinel-2 images. Simple CNNs such as LeNet require less computational resources compared to more-complex architectures. A total of 11 LULC classes were used for training and validating the model, which were then used for classifying the sub-basins. The analysis showed that the proposed CNN achieved an Overall Accuracy of 96.51% with a kappa coefficient of 0.962 in the validation data, outperforming traditional machine learning methods such as Random Forest, Support Vector Machine and Artificial Neural Networks, as well as state-of-the-art complex deep learning methods such as ResNet, DenseNet and EfficientNet. Moreover, despite being trained in over seven million images, it took five h to train, demonstrating that our simple CNN architecture is only effective but is also efficient.

28 April 2025 in Data in Brief
Verified
Journal Article
Open access
DADarwin Alexis Arrechea-Castillo
Darwin Alexis Arrechea-Castillo
PEPaula Espitia-Buitrago
Paula Espitia-Buitrago
DFDavid Florian-Vargas
David Florian-Vargas
RARonald David Arboleda
Ronald David Arboleda
RVRiquelmer Velázquez-Hernández
Riquelmer Velázquez-Hernández
JCJuan Andrés Cardoso
Juan Andrés Cardoso
This dataset is an expanded version of a previously published collection of high-resolution RGB images of Urochloa spp. genotypes, initially designed to facilitate automated classification of phenological stages and raceme identification in forage breeding trials. The original dataset included 2400 images of 200 genotypes captured under controlled conditions, supporting the development of computer vision models for High-Throughput Phenotyping (HTP). In this updated release, 139 additional images and 24,983 new annotations have been added, bringing the dataset to a total of 2539 images and 47,323 raceme annotations. This version introduces increased diversity in image-capture conditions, with data collected from two geographic locations (Palmira, Colombia, and Ocozocoautla de Espinosa, Mexico) and a range of image-capture devices, including smartphones (e.g. Realme C53 and Oppo Reno 11), a Nikon D5600 camera, and a Phantom 4 Pro V2 drone. Images now vary in perspective (nadir, high-angle, and frontal) and capture distance (1–3 meters), enhancing the dataset applicability for robust Deep Learning (DL) models. Compared to the original dataset, raceme density per plant has nearly doubled in some samples, offering higher raceme overlap for advanced instance segmentation tasks. This expanded dataset supports deeper exploration of phenotypic variation in Urochloa spp. and offers greater potential for developing adaptable models in crop phenotyping.

8 May 2025 in SoftwareX
Verified
Journal Article
Open access
DADarwin Alexis Arrechea-Castillo
Darwin Alexis Arrechea-Castillo
PEPaula Espitia-Buitrago
Paula Espitia-Buitrago
RARonald David Arboleda
Ronald David Arboleda
AGAna Marcela Gallego-Muñoz
Ana Marcela Gallego-Muñoz
VMValeria Moreno-Domínguez
Valeria Moreno-Domínguez
JCJuan Andrés Cardoso
Juan Andrés Cardoso