Wavelength-multiplexed matched spatial filters are used in an incoherent optical pattern recognition system. The system produces color-coded correlation responses which allow the simultaneous recognition of several objects and, in addition, reduces the requirements on filter positioning devices. Analysis of the system, comparison with previous systems, experimental results, and discussions are ...

Recognizing and foreseeing which credit clients will be "good or bad payers" is an important and di cult task for bank institutions and credit protection services. Using data from approximately 10,000 clients obtained from a large private Brazilian bank, we present a methodology to perform the credit scoring analysis. The methodology proposed is divided into 2 stages: statistical data analysis ...

We describe the implementation of the automatic spatial-frequency-selection filter for recognition of patterns obtained with a digital holographic microscope working with a partially coherent source. The microscope provides the complex-optical-amplitude field that allows a refocusing plane-by-plane of the sample under investigation by numerical computation of the optical propagation. By inserti...

Ongoing learning refers to the possibility of a system to increase knowledge from the experience obtained when working in the classification of new patterns. In this paper, we present an automatic classification system with ongoing learning capabilities and analyze the importance of using some size reduction algorithm to remove redundant training patterns.

The task of human vision is to reliably infer useful information about the external environment from images formed on the retinae. In general, the inference of scene properties from retinal images is not deductive; it requires knowledge about the external environment. Further, it has been suggested that the environment must be regular in some way in order for any scene properties to be reliably...

The interrelationships between sleep, ecological, and constitutional variables were assessed statistically for 39 mammalian species. Slow-wave sleep is negatively associated with a factor related to body size, which suggests that large amounts of this sleep phase are disadvantageous in large species. Paradoxical sleep is associated with a factor related to predatory danger, which suggests that ...