A5019796591- Optical measurement and interference techniques
- Advanced Measurement and Metrology Techniques
- Image Processing Techniques and Applications
- Image and Object Detection Techniques
- Advanced X-ray Imaging Techniques
- Surface Roughness and Optical Measurements
- Optical Coatings and Gratings
- Thermography and Photoacoustic Techniques
- Speech Recognition and Synthesis
- Adaptive optics and wavefront sensing
- Spectroscopy and Chemometric Analyses
- Laser and Thermal Forming Techniques
- Machine Learning and Data Classification
- Speech and Audio Processing
- Metaheuristic Optimization Algorithms Research
- Fuzzy Logic and Control Systems
- Non-Destructive Testing Techniques
- Surface Treatment and Residual Stress
- Semiconductor Lasers and Optical Devices
- Laser Material Processing Techniques
- Advanced Vision and Imaging
- Advanced Measurement and Detection Methods
- Forensic Fingerprint Detection Methods
- Advanced Optical Imaging Technologies
- Evolutionary Algorithms and Applications
Universidad de Guadalajara
2014-2025
Universidad Enrique Díaz de León
2009-2024
Tecnológico de Monterrey
2021
Autonomous University of Queretaro
2013
Universidad Nacional Autónoma de México
2013
Universidad Politécnica de Madrid
2008-2011
Center for Engineering and Industrial Development
2008
Centro de Investigaciones en Optica
2001-2005
Knowing the type (i.e., biochemical composition) of kidney stones is crucial to prevent relapses with an appropriate treatment. During ureteroscopies, are fragmented, extracted from urinary tract, and their composition determined using a morpho-constitutional analysis. This procedure time-consuming (the analysis results only available after several weeks) tedious fragment extraction lasts up hour). Identifying stone in-vivo endoscopic images would allow for dusting fragments eneable early...
A MEMS gyroscope is a low-cost electronic device used to determine the angular rotation rate ? of rigid body with respect its x, y, and z axes, latter known as yaw. The measurement on each axis perturbed by phenomena bias, bias instability, angle random walk. It desirable accurately calculate yaw angle; however, walk make this calculation impossible; several algorithms have been reported in literature achieve such goal, Kalman complementary filters. We propose an improvement estimation...
In this work, an experimental implementation of a chaotic oscillator is proposed. Many works have been proposed in order to solve some different interesting problems, such that determining structural damages materials or for secure communications purpose. However, several approaches are continuous-time, whereas many cases, the systems desired be discrete-time mode and real time. work we present one (Lorenz system) into simple microcontroller, consists only low cost few resistors algorithm....
Phase-shifting is one of the most useful methods phase recovery in digital interferometry estimation small displacements, but miscalibration errors shifters are very common. In practice, main problem associated with such related to response shifter devices, since they dependent on mechanical and/or electrical parts. this work, a novel technique detect and measure calibration phase-shifting interferometry, when an unexpected shift arises, proposed. The described method uses Radon transform,...
We describe a new algorithm for phase determination from single interferogram with closed fringes based on an unwrapping procedure. Here we use bandpass filtering in the Fourier domain, obtaining two wrapped phases sign changes corresponding to orientation of applied filters. An scheme that corrects ambiguities by comparing local derivatives is then proposed. This can be done, assuming do not change abruptly among adjacent areas as occurs smooth continuous maps. The proposed works fast and...
In this work, we present the exact equations for back and effective focal lengths of a plano-concave thick lens. These are derived through detailed ray-tracing approach, calculating meridional ray’s path parallel to optical axis while taking into account lens thickness, refractive index, surface curvature. Our analysis bridges gap between paraxial approximations ray behavior, highlighting how traditional models (e.g., thin-lens equations) can be extended lenses. Additionally, review recent...
Automated real-time tissue assessment using Raman spectroscopy for breast cancer detection is feasible; however, long-term specificity and sensitivity as reported so far in the literature can still be improved by a more reliable algorithm detection. Applying automatic reduction of background fluorescence to spectra Bayesian classification on 18 discriminant bands range 1200–1800 cm−1, we achieved 100% accuracy classifying biopsies healthy cancerous tissues, making it suitable automated...
The Ronchi test with a LCD amplitude sinusoidal grating is used for testing convergent optical systems. rulings are computer- generated and displayed on the LCD. By displaying various phase- shifted capturing corresponding images, phase obtained conventional phase-shifting algorithms. For reference, experimental results compared those commercial Fizeau interferometer. © 2003 Society of Photo-Optical Instrumentation Engineers.
In this work, we present the simulation results of a passively Q-switched Nd: YVO4/Cr:YAG laser model with pump modulation for applications in stabilization control contemplating different harmonic regimes. We study detail complex dynamics by varying values two parameters: power and external frequency. By using bifurcation diagrams, state basins attraction demonstrated coexistence multiple attractors (multistability) phase locking dependent regimes parameters. Our can be used to improve...
This paper describes a new implementation of mixture techniques not used before for fingerprint recognition. The consists three stages: the location core, which is done through Radon transformation, extraction features (out square produced with and center mass obtained from it), in stage three, resulting image to train neural network order obtain better LVQ classification. improvement effectiveness tested using two databases fingerprints. Correct recognition rates have exceeded 90 percent,...
Due to the physical nature of interference phenomenon, extracting phase an interferogram is a known sinusoidal modulation problem. In order solve this problem, new hybrid mathematical optimization model for extraction established. The combination frequency guide sequential demodulation and harmony search algorithms used demodulating closed fringes patterns in find applications. proposed algorithm tested four sets different synthetic interferograms, finding range average relative error...
The Ronchi test with a LCD amplitude sinusoidal grating is used for testing nominally flat surfaces. We prove that it possible to measure surfaces without using reference element by modifying the common optical set up. rulings are computer generated and displayed on LCD. By displaying various phase-shifted capturing corresponding images, phase obtained conventional phase-shifting algorithms. Theoretical experimental results shown.
A procedure to improve the quality of extracted phase by a passband filter within spatial frequency domain is proposed, using double-digital fringe projection method for obtaining contour surface different objects. This requires digital two patterns same object generate an interference pattern containing moiré fringes, which are related shape measured object. The proposed pretends remove remnant frequencies projected fringes keeping only pattern.