Javier Saldivar

Dr. Javier Saldivar

orcid

Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

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

Representative Publications

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18 November 2025 in Technologies
Verified
Journal Article
Open access
PDF file
RRRafael Reveles-Martínez
Rafael Reveles-Martínez
HGHamurabi Gamboa
Hamurabi Gamboa
ESErika Sánchez-Femat
Erika Sánchez-Femat
JSJavier Saldivar
Javier Saldivar
TITeodoro Ibarra
Teodoro Ibarra
JPJose Maria Padilla
Jose Maria Padilla
Traffic sign recognition is still one of the challenging aspects of intelligent vehicle systems, mainly when processor or memory resources are limited. In this work, real-time traffic sign detection was evaluated using five YOLO model variants—Nano, Small, Medium, Large, and XLarge—across versions 8 to 11. All models were trained and validated with a custom dataset collected in a simulated urban environment designed to replicate FIRA competition tracks. The models were then deployed and tested on a 1:10 scale autonomous vehicle equipped with a mini PC running the detector in real time. Performance was compared using mAP@50–95, F1-score, inference latency, and preprocessing and postprocessing times. The authors also analyzed training behavior, focusing on convergence speed and stopping criteria. The experiments showed that YOLOv10 B achieved the highest performance across varying conditions, while YOLOv8 M provided a better balance between speed and accuracy. These results can help practitioners select appropriate YOLO architectures for embedded traffic sign recognition systems that must operate in real time on resource-constrained autonomous vehicles.

4 November 2025 in Data
Verified
Journal Article
Open access
PDF file
ESErika Sánchez-Femat
Erika Sánchez-Femat
Carlos Eric Galván-TejadaCarlos Eric Galván-Tejada
Carlos Eric Galván-Tejada
Carlos Eric Galván-TejadaCarlos Eric Galván-Tejada
Carlos Eric Galván-Tejada
HGHamurabi Gamboa
Hamurabi Gamboa
Huizilopoztli Luna-GarcíaHuizilopoztli Luna-García
Huizilopoztli Luna-García
JPJose Maria Padilla
Jose Maria Padilla
Early and accurate breast cancer detection is critical for patient outcomes. The Curated Breast Imaging Subset of the Digital Database for Screening Mammography (CBIS-DDSM) has been instrumental for computer-aided diagnosis (CAD) systems. However, the lack of a standardized preprocessing pipeline and consistent metadata has limited its utility for reproducible quantitative imaging or radiomics. This paper introduces CBIS-DDSM-R, an open-source, radiomics-ready extension of the original dataset. It provides an automated pipeline for preprocessing mammograms and extracts a standardized set of 93 radiomics features per lesion, adhering to Image Biomarker Standardisation Initiative (IBSI) guidelines using PyRadiomics. The resulting dataset combines clinical and radiomics data into a unified format, offering a robust benchmark for developing and validating reproducible radiomics models for breast cancer characterization.

5 March 2025
Verified
Book Chapter
Closed access
PDF file
AQAlan C. Quezada-Villalobos
Alan C. Quezada-Villalobos
JPJose Maria Padilla
Jose Maria Padilla
Huizilopoztli Luna-GarcíaHuizilopoztli Luna-García
Huizilopoztli Luna-García
JSJavier Saldivar
Javier Saldivar
Luis Carlos RevelesLuis Carlos Reveles
Luis Carlos Reveles
RRRafael Reveles-Martínez
Rafael Reveles-Martínez

13 August 2026 in Automation
Verified
Journal Article
Open access
PDF file
RRRafael Reveles-Martínez
Rafael Reveles-Martínez
HGHamurabi Gamboa
Hamurabi Gamboa
Huizilopoztli Luna-GarcíaHuizilopoztli Luna-García
Huizilopoztli Luna-García
ESErika Sánchez-Femat
Erika Sánchez-Femat
JSJavier Saldivar
Javier Saldivar
JPJose Maria Padilla
Jose Maria Padilla
Lane keeping under degraded visual confidence remains challenging because most existing approaches focus either on improving lane-feature extraction or on estimating vehicle motion, while giving less attention to how unreliable visual measurements should modify the estimator–controller interaction in a physical closed-loop system. This paper presents a confidence-gated Kalman lane-keeping architecture for a 1:10-scale autonomous vehicle. The methodological contribution lies in the direct coupling of visual confidence, state estimation, and steering control: unreliable lane measurements are down-weighted through confidence-dependent measurement noise, while the propagated lane-relative state remains available to the controller. The primary experimental unit is the run, defined as one logged lap under one control configuration; frame-level summaries are retained only as historical reproducibility material. In the run-level comparison, the autonomous vision, inertial measurement unit (IMU)-feedforward, and Kalman filter (KF) group KF_G1—the first inferential KF generation—had lower mean absolute error than the human baseline, while vision and KF_G1 had overlapping run-level confidence intervals for absolute error. KF_G1 shifted the mean signed bias closer to the lane reference than the vision and IMU groups, but with higher run-level spread than vision. KF_G2, the second observational KF generation, is reported only as an observational generation comparison, so no causal claim is made for its estimator–controller correction weight Ks=0.15 setting. KF_G3, the single descriptive adverse-condition KF run, is reported without an estimable confidence interval or population-level adverse-illumination inference. A further limitation is that the inertial prediction pathway was inactive in the logged Kalman-filter runs because the inertial coupling coefficient α=0. The main contribution is a reproducible run-level evaluation of confidence-gated estimator–controller coupling that distinguishes supported evidence from observational and descriptive cases.

13 March 2025
Verified
Book Chapter
Closed access
PDF file
RRRafael Reveles-Martínez
Rafael Reveles-Martínez
JPJose Maria Padilla
Jose Maria Padilla
HGHamurabi Gamboa
Hamurabi Gamboa
UMUziel A. Mendoza-Saldivar
Uziel A. Mendoza-Saldivar
DDDiego A. Domínguez-Jaramillo
Diego A. Domínguez-Jaramillo
JSJavier Saldivar
Javier Saldivar

1 June 2026
Verified
Book Chapter
Closed access
JPJose Maria Padilla
Jose Maria Padilla
RRRafael Reveles-Martínez
Rafael Reveles-Martínez
JSJavier Saldivar
Javier Saldivar
HGHamurabi Gamboa
Hamurabi Gamboa
Carlos Eric Galván-TejadaCarlos Eric Galván-Tejada
Carlos Eric Galván-Tejada
JDJuan R. Delgado-Contreras
Juan R. Delgado-Contreras