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In order to generate photorealistic images, a central problem in computer graphics is the description of an object reflectance model. The reflectance field technique describes the object surface properties and can be used for photorealistic rendering. The reflection of surfaces can be described as a high dimensional reflectance function. For complex surfaces, an analytical model is not always easy...
The surveillance sphere (SS) is a servo-mechanism that is mounted on a aircraft model MI-17 for tasks of air surveillance (marine and terrestrial). Therefore the sphere is considered a servo-mechanism of two grades of freedom and its mathematical model it is obtained using Lagrange's equations. This paper it is about over model's obtaining only considering conservative forces.
In this work, implementation of a system-on-chip in a field programmable gate array (FPGA) is described. This system analyzes temporal phase-shift in a pattern of interference fringes, in order to measure displacements in real-time. The interferograms images are introduced to the FPGA through a charge coupled device (CCD). A pipeline architecture is used to the stages of phase analysis and display...
One of the most extended algorithms for image scaling is bicubic interpolation. In this paper, a hardware architecture for bicubic interpolation (HABI) is proposed. The HABI proposed is integrated by three main blocks: the first one generates the interpolation coefficients, which implements the bicubic function to be used in HABI; the second one performs the interpolation process and the third one...
In this paper, we present a system developed to identify metal nanoparticles at different orientations, using digital image processing and analysis. The correct identification is important in nanotechnology, where it is possible to build structures for different purposes at the nanometric level. The recognition system computes automatically different characteristics such as: nanoparticle area, polygons,...
Motion estimation of a scene is an interesting problem in computer vision since it is the basis for the dynamic analysis of a scene. However this task is computational intensive for conventional processors. In this work, a FPGA-based hardware architecture for real-time motion estimation is proposed. The technique used for motion estimation is a variation of the optical flow algorithm where the problem...
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