Publications
2020
Chaves, Deisy; Fidalgo, Eduardo; Alegre, Enrique; Jánez-Martino, Francisco; Biswas, Rubel
Improving Age Estimation in Minors and Young Adults with Occluded Faces to Fight Against Child Sexual Exploitation. Proceedings Article
En: VISIGRAPP (5: VISAPP), pp. 721–729, 2020.
Resumen | Enlaces | BibTeX | Etiquetas: Age Estimation, CSEM, Eye Occlusion, Forensic Images, SSR-Net-Model
@inproceedings{chaves_improving_2020-1,
title = {Improving Age Estimation in Minors and Young Adults with Occluded Faces to Fight Against Child Sexual Exploitation.},
author = {Deisy Chaves and Eduardo Fidalgo and Enrique Alegre and Francisco Jánez-Martino and Rubel Biswas},
url = {https://pdfs.semanticscholar.org/b1eb/3264582c54c648cd8329deddf99f64ddb094.pdf},
year = {2020},
date = {2020-01-01},
booktitle = {VISIGRAPP (5: VISAPP)},
pages = {721–729},
abstract = {This study focuses on improving age estimation accuracy in Child Sexual Exploitation Materials, particularly for minors and young adults, using the Soft Stagewise Regression Network (SSR-Net) model. The challenge arises from unbalanced training data and facial occlusion (e.g., covering the eyes to hide victims' identities), which negatively impact the performance of age estimators. The proposed approach combines non-occluded and occluded facial images to create robust SSR-Net models. This strategy significantly enhances the model's performance, reducing the Mean Absolute Error (MAE) from 7.26, 6.81, and 6.5 to 4.07 on the IMBD, MORPH, and Deep EXpectation datasets, respectively.},
keywords = {Age Estimation, CSEM, Eye Occlusion, Forensic Images, SSR-Net-Model},
pubstate = {published},
tppubtype = {inproceedings}
}
2019
Chaves, Deisy; Fidalgo, Eduardo; Alegre, Enrique; Blanco-Medina, Pablo
Improving Speed-Accuracy Trade-off in Face Detectors for Forensic Tools by Image Resizing Artículo de revista
En: V Jornadas Nacionales De Investigación en Ciberseguridad, vol. 1, no 1, pp. 222–223, 2019, (Publisher: Universidad de Cáceres).
Resumen | Enlaces | BibTeX | Etiquetas: CSA, deep learning, face detection, Forensic Images
@article{chaves_improving_2019,
title = {Improving Speed-Accuracy Trade-off in Face Detectors for Forensic Tools by Image Resizing},
author = {Deisy Chaves and Eduardo Fidalgo and Enrique Alegre and Pablo Blanco-Medina},
url = {https://www.researchgate.net/profile/Deisy-Chaves/publication/345312886_Improving_Speed-Accuracy_Trade-off_in_FaceDetectors_for_Forensic_Tools_by_Image_Resizing/links/5fa39e3b92851cc28695f323/Improving-Speed-Accuracy-Trade-off-in-FaceDetectors-for-Forensic-Tools-by-Image-Resizing.pdf},
year = {2019},
date = {2019-01-01},
journal = {V Jornadas Nacionales De Investigación en Ciberseguridad},
volume = {1},
number = {1},
pages = {222–223},
abstract = {This study proposes a strategy to improve face detection speed and accuracy in forensic material analysis, especially for Child Sexual Abuse cases. The method focuses on image resizing to enhance the performance of three deep-learning-based face detectors while ensuring real-time application capability. The results show that resizing images to 50% of their original size strikes the best balance between speed and accuracy, allowing faster face detection with minimal loss in performance.},
note = {Publisher: Universidad de Cáceres},
keywords = {CSA, deep learning, face detection, Forensic Images},
pubstate = {published},
tppubtype = {article}
}