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The edge detection process can be broken down into four basic transformations, modifying the image from the original presentation to the final edges one. The adoption of this framework makes the process far more understandable, and offers an starting point for the combination and comparison of different edge detection methods. In this work we analyze the role of the third of the transformations, the...
Cellular Nonlinear Networks (CNN) establish a theoretical framework in which programmable focal-plane image processing arrays can be developed. The conventional support for its analog programmability in VLSI is the implementation of transconductor-based multiplication of the input, output and state variables times the corresponding template elements. However, some distributions of weights can be greatly...
A new electronic design for virtual matrix LED based screens is presented using D-Type Flip-Flops registers (HC logic) instead of constant current drivers. This design reduces in a significant way the cost and the complexity of the current large LEDs displays. It works as a write only memory on the basis: "it is seen what is saved". This design is adequate for variable brightness screens...
This paper analyses a MOS-based resistive network suitable for massively parallel image processing. The inclusion of MOS transistors biased in the ohmic region instead of true resistors permits certain control over the underlying spatial filtering while reducing the required area for VLSI implementation. However, it also leads to nonlinearities and thereby to errors with respect to an ideal resistive...
There is a multicore platform that is currently concentrating an enormous attention due to its tremendous potential in terms of sustained performance: the NVIDIA Tesla boards. These cards intended for general-purpose computing on graphic processing units (GPGPUs) are used as data-parallel computing devices. They are based on the Computed Unified Device Architecture (CUDA) which is common to the latest...
We review several results from geodetic observations carried out in La Palma Island during the period 1992-2007. A gravity survey was done for structural studies, and InSAR and GPS observations techniques were applied to study the existence of deformation areas in the Island. Gravity anomalies have been inverted using a non-linear three-dimensional gravity inversion approach to obtain the geometry...
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