Visual illusion is the fallacious perception of reality or some actually existing object. In this paper, we imitate the mechanism of Ehrenstein illusion, neon color spreading illusion, watercolor illusion, Kanizsa ill...
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Visual illusion is the fallacious perception of reality or some actually existing object. In this paper, we imitate the mechanism of Ehrenstein illusion, neon color spreading illusion, watercolor illusion, Kanizsa illusion, shifted edges illusion, and hybrid image illusion using the Open Source Computer Vision Library (OpenCV). We also imitate these illusions using Cellular Neural Networks (CNNs). These imitations suggest that some illusions are processed by high-level brain functions. We next apply the morphological gradient operation to anomalous motion illusions. The processed images are classified into two kinds of images, which correspond to the central drift illusion and the peripheral drift illusion, respectively. It demonstrates that the contrast of the colors plays an important role in the anomalous motion illusion. We also imitate the anomalous motion illusions using both OpenCV and CNN. These imitations suggest that some visual illusions may be processed by the illusory movement of animations.
A new method for fabrication of diffractive structures, which we call quasi-direct writing, is illustrated. The diffractive structures can be generated by changing the pixel spacing along the direction of the cross sc...
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A new method for fabrication of diffractive structures, which we call quasi-direct writing, is illustrated. The diffractive structures can be generated by changing the pixel spacing along the direction of the cross scan ( with zero overlap) and keeping the pixel spacing constant along the other scan direction, with a normal overlap of 50% - 60%, while the substrate surface is scanned with a focused ion beam (FIB). Quasi-direct writing is a method for achieving special customer designs when the milling machine has no computer programming function. Diffractive structures with various periods and depths can be derived by controlling the parameters of pixel spacing, beam current, ion incidence angle, and the scan time or ion dose. The method is not restricted to any one material and can be used for metals, insulators, and semiconductors. (C) 2004 Optical Society of America.
Boundary scan is a widely adopted DFT (Design For Test). According to the characteristic of FPGA application, this paper presents a boundary scan circuit designed for FDEGA (Field-programmable Datapath Enhanced Gate A...
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ISBN:
(纸本)078037889X
Boundary scan is a widely adopted DFT (Design For Test). According to the characteristic of FPGA application, this paper presents a boundary scan circuit designed for FDEGA (Field-programmable Datapath Enhanced Gate Array), an FPGA new architecture of our group. This design emphasizes the function of PCB level test while considering chip level test function as well. We also integrate device-programming function into the circuit. In implementation of our design, "single DFF (D Flip-Flop) chain" structure is adopted to decrease area consumption. We finished the layout design in 0.6um CMOS process and integrated it into our FDEGA chip. Test result of fabricated chip meets the design requirement, and shows that the circuit can achieve the expected test function and programming function while observing IEEE1149.1 standard.
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