Papers by Ramon Vasquez Espinosa
International Journal of Remote Sensing, 2010
Texture Synthesis using Reaction-Diffusion
ABSTRACT
Logical Operators for Texture Image Analysis
Page 1. Logical Operators for Texture Image Analysis Vidya Manian and Ramón Vásquez ... Fig. 4. S... more Page 1. Logical Operators for Texture Image Analysis Vidya Manian and Ramón Vásquez ... Fig. 4. Selected logical operators where the vertical slit mask }Vv V ; 1 , integer ,:),{ 2 1 1 ≤≤ ≤≤ = Nu vuvu Vm If x and y are defined as bu aydv cx += += ; where 1 1 ...
Classifier performance for SAR image classification
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2000
Abstract - Classifier robustness is important for classification of remote sensing images. This p... more Abstract - Classifier robustness is important for classification of remote sensing images. This paper investigates the use of the supervised Maximum Likelihood (ML) classifier and the unsupervised K-means algorithm. Classifier adaptability to other data sets is considered. Also, a method ...
Summer station: initiating the undergraduate research experience in RS/GIS
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2000
The Partnership for Spatial and Computational Research (PaSCoR) was established in 1998 at the Un... more The Partnership for Spatial and Computational Research (PaSCoR) was established in 1998 at the University of Puerto Rico, Mayaguez through a PAIR-NASA grant. The PaSCoR program aims to develop an undergraduate curricular experience in remote sensing (RS) and geographical information system (GIS) that result in professional knowledgeable of the discipline in concepts and applications and with strengthened soft skills in
Scaled and Rotated Texture Classification Using a Class of Basis Functions
Pattern Recognition, 1998
... The basis algorithm is com-pared with co-occurrence and Laws methods ... Figure 8(b) shows th... more ... The basis algorithm is com-pared with co-occurrence and Laws methods ... Figure 8(b) shows the raffia texture at a scale of 1.9 and orientation of 60", with inlay nontextured ... The average energy and average residual features at inter-scales 3-4 of the decomposition are the best for ...
In this paper, we compare the performance of three different wavelet methods for color texture cl... more In this paper, we compare the performance of three different wavelet methods for color texture classification. Wavelet transforms are useful for extracting texture features of images. These features are used for texture recognition, and constitute energy, entropy values of sub - images computed using Pyramid structure Wavelet Transform (PWT) or tree structured Wavelet Transform (TWT). As color images have 3
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Abstract: There are various approaches to integrate hands-on learning into the curriculum. This p... more Abstract: There are various approaches to integrate hands-on learning into the curriculum. This paper describes two approaches undertaken by the University of Puerto Rico at Mayagüez (UPRM). One is the Learning Factoryimplemented by the Manufacturing ...
Education (NSF, NASA, …, 2001
Abstract-Industry partners are important stakeholders for the College of Engineering at the Unive... more Abstract-Industry partners are important stakeholders for the College of Engineering at the University of Puerto Rico at Mayagüez Campus (UPRM). They not only play an important role in curriculum revitalization but also provide important feedback on the skills, values ...
Remote sensing QPE uncertainties associated with sub-pixel rainfall variation
... SW Washington, DC 20591.]. 5. Young, CB, BR Nelson, AA Bradley, JA Smith, CD Peters-Lidard, A... more ... SW Washington, DC 20591.]. 5. Young, CB, BR Nelson, AA Bradley, JA Smith, CD Peters-Lidard, A. Kruger, and ML Baeck, 1999: An evaluation of NEXRAD precipitation estimates in complex terrain. J. Geophys. ... Robert J. Kuligowski: colleagues. Ramón Vasquez: colleagues. ...
Infrared Fluorescence Measurements of Gaseous Benzene with a New Home-Made Spectrometer
Production and characterization of organic molecules such as gas phase Polycyclic Aromatic Hydroc... more Production and characterization of organic molecules such as gas phase Polycyclic Aromatic Hydrocarbons (PAHs) are one of the major challenges in laboratory astrophysics. Infrared spectral signatures are emitted by molecules in interstellar clouds submitted to UV radiations from surrounding stars. These infrared bands, the so-called Aromatic Infrared Bands (AIBs), have been attributed to PAHs since now 27 years However, experimental
Summer station: initiating the undergraduate research experience in RS/GIS
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2000
The Partnership for Spatial and Computational Research (PaSCoR) was established in 1998 at the Un... more The Partnership for Spatial and Computational Research (PaSCoR) was established in 1998 at the University of Puerto Rico, Mayaguez through a PAIR-NASA grant. The PaSCoR program aims to develop an undergraduate curricular experience in remote sensing (RS) and geographical information system (GIS) that result in professional knowledgeable of the discipline in concepts and applications and with strengthened soft skills in
The soil moisture process exhibits spatial and temporal variability. Spatial variability is mostl... more The soil moisture process exhibits spatial and temporal variability. Spatial variability is mostly associated with climate, topography, soil and vegetation classes; where as, the temporal variability is closely related to rainfall and air temperature behavior. A transfer function model is proposed to express the spatial and temporal variability of the soil moisture. The spatial variability is modeled by identifying homogeneous
Mass spectrometry of interstellar dust analogs produced in a hydrocarbon rich flame
Polycyclic Aromatic Hydrocarbons (PAHs) are considered to be an important component of the inters... more Polycyclic Aromatic Hydrocarbons (PAHs) are considered to be an important component of the interstellar medium. However, no formal identification is possible at present, due to a lack of laboratory gas-phase spectral data for most of them. In order to characterize the PAHs formed in a hydrocarbon rich flame, we use a time-of-flight mass spectrometer. A large variety of conditions have
2005 6th International Conference on Information Technology Based Higher Education and Training, 2005
Engineering education is facing difficult times attracting women, African-Americans, and Hispanic... more Engineering education is facing difficult times attracting women, African-Americans, and Hispanics in academia in the United States. The problem worsens in graduate education as the statistics for women and minority faculty at engineering graduate schools across the country are depressingly low. As the quest for knowledge increases we must provide PhD students with new tools and resources to compete and succeed in the global economy. In 2002, a unique partnership between Syracuse University, Cornell University, Rensselaer Polytechnic Institute, and the University of Puerto Rico-Mayaguez was established under the name of "The Alliance for Graduate Education and The Professorate: Central New York-Puerto Rico" (AGEP: CNY-PR). The alliance has been successful in increasing the number of minorities and female obtaining PhD degrees in Science, Mathematics and Engineering while promoting research and education collaboration among the allied institutions.
Ever since the approval of the new Accreditation Board for Engineering and Technology (ABET) En... more Ever since the approval of the new Accreditation Board for Engineering and Technology (ABET) Engineering Criteria (EC 2000) by the Board of Directors of ABET on November 2, 1996, and its mandatory application as of Fall 2001 , educational institutions across the United States have had to assess and evaluate their undergraduate engineering programs from a different perspective. That is, ABET EC 2000 was designed to employ the philosophy and practice of continuous quality improvement to engineering programs. Engineering Criteria 2000 call for each engineering program to identify its constituencies and, based upon their feedback, to formulate the services that each program will provide. The first step is the development of program educational objectives -statements describing expected achievements of graduates in the early years of their careers after graduation as a result of their educational preparation. Usually, educational objectives are expectations of graduates' performance after they have left the school and been in the workforce for three to five years. Subsequently, the second step requires the more specific definition of program outcomes -skills, knowledge and behavior that would be expected of students at the time of their graduation. All this requires considerable time and effort, not only to clearly define the program educational objectives and program outcomes, but also to develop proper and continuous assessment methods and tools, the documentation, the processes, and the necessary culture and philosophy changes that would be introduced as a consequence of the cyclical processes. We, at the University of Puerto Rico at Mayaguez, realized the significance of EC 2000 early on and undertook planning and organizational steps fully four years prior to the actual site visit. All six of our undergraduate programs were evaluated during November 2002.
Towards the electronic spectroscopy of large PAHs in a fuel-rich flame
Polycyclic Aromatic Hydrocarbons (PAHs) are considered to be an important component of the inters... more Polycyclic Aromatic Hydrocarbons (PAHs) are considered to be an important component of the interstellar medium. However, no formal identification is possible at present, due to a lack of laboratory gas-phase spectral data for most of them. We present an exploration of our new chemical reactor, a low-pressure flame, from which a large amount of PAHs are produced. This step is necessary, if we want to perform UV-visible electronic spectra of such large carbonaceous molecules, which could be compared to astrophysical data.
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Abstract: There are various approaches to integrate hands-on learning into the curriculum. This p... more Abstract: There are various approaches to integrate hands-on learning into the curriculum. This paper describes two approaches undertaken by the University of Puerto Rico at Mayagüez (UPRM). One is the Learning Factoryimplemented by the Manufacturing ...
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Papers by Ramon Vasquez Espinosa