Advanced Materials Research Vol. 981

Abstract: A modified proportional 2-tuple was proposed to apply to the term sets in that the distance of the adjacent tems is not equal,and the comparison methods as well as the aggregation operators were proposed too.And the modified proportional 2-tuple fuzzy linguistic representation model is extended to uncertainty modified proportional 2-tuple fuzzy linguistic representation model,and the new comparison rule and aggregation operators were provided.

Abstract: This paper regards combinatorial techniques for electronic engineering design based on the mathematical apparatus of Non Redundant Scales theory (NRS theory).Combinatorial techniques is known to be of widespread applicability, and has been extremely effective when applied to the problem of finding the optimum ordered arrangement of structural elements in spatially or temporally distributed systems with non-uniform structure (e.g. line gages) with respect to resolving ability. These design techniques make it possible to configure electronic devices or systems with fever elements than at present, while maintaining on resolving ability and positioning precision. The NRS theory can be used to finding optimal design for wide classes of technological problems in measurement and radio electronic engineering based on combinatorial techniques.

Abstract: For the objective fact that elements with different membership degrees should have different contribution to the metric measure between fuzzy numbers, this paper presents Lp-type of fuzzy number metrics weighted by structured element. Firstly, we define a metric weighted by structured element on the family (B[-1,1]) of all the same monotone and standard bounded functions on closed interval [-1,1] , and discuss the completeness and separability of those metric spaces; Next, using the fuzzy functional induced by normal fuzzy structured element, we give out a method that the metric of the closed bounded fuzzy number space is induced by the metric on function space B[-1,1]. Furthermore, a fuzzy number metric weighted by structured element which is induced by is presented ,and analyze completeness and separability of the induced fuzzy number metric spaces; Lastly, the difference and relationship between and the metric defined by traditional method are shown.

Abstract: Voice activation detection is a very important part in speech related domain. The classic voice activation detection normally depends on feature parameters in time or frequency domain, or parameters from statistical model. An improved voice activation detection method based on energy acceleration parameters and support vector machine is proposed in this paper. The energy acceleration parameters are the voice activation detection parameters in ETSI Advanced front-end feature extraction algorithm. The training period of support vector machine is based on energy acceleration parameters and manually appended class labels of each frame. In the detection period, the detection result is derived from energy acceleration parameters and Lagrange parameters calculated from training period. The experimental result shows that the false alarm rate of proposed method is greatly decreased. It has been observed that the voice activation detection proposed is better than the voice activation detection in ETSI Advanced front-end feature extraction algorithm.

Abstract: Based on the principle of passive optical athermalization, a wide field medium wave infrared optical system is designed for working at -40℃-60℃. A 320×240 focal plane array (FPA) detector as image plane is used in the system. The system has a field-of-view of 30°×22.72° and a relative aperture of f/2 at 3-5 µm with 100% cold shield efficiency. The modulation transfer function (MTF) of each field is greater than 0.6 at the Nyquist frequency and the maximum distortion is less than 3% at -40℃-60℃. The system can meet the demand of the excellent image quality. This work is valuable for athermalization design of wide field medium wave infrared optical system.

Abstract: In this paper, the design and architecture of general digital image processing circuit (GFDIPC) based on a Xilinx Virtex-5 FPGA processor is presented. The GFDIPC applications on thermal imaging, image fusion, real-time video stabilization and time-delay test for image processing system are described. The design of FPGA in each application follows the principle of functional modularity, pipeline processing and parallel computing, which brings FPGA high efficiency and high real-time performance.

Abstract: Image contrast of fiber gyroscope fiber defects was low, at the same time object and background didn’t discriminate easily. Fuzzy image enhancement processing was studied and part low gray level was set zero, which leads to original image information loss using the Pal fuzzy algorithm. Combine minimum bias-normal distribution index and modified fuzzy algorithm was put forward and spacing point is counted by minimum bias-normal distribution index and then automatically affirms sub region and nonlinearity transformation was used in inverse process. This algorithm can engender different enhancement effect in different image region, which enhance contrast ratio in object and background, outstanding defect character. The algorithm was used for fiber gyroscope fiber defect infrared image processing. Experiment results show that the algorithm is effectiveness.

Abstract: A new algorithm for removing pixel crosstalk in CMOS image sensors with Bayer color filter array was proposed. The algorithm can estimate low/high frequency image and provide adaptive threshold based on the human visual characteristics. By simulation experimentation on Macbeth color checker, resolution checker and real image, the experimental results revealed that this algorithm can remove the pixel crosstalk effectively.

Abstract: We address the problem of producing an enlarged picture from a given digital image (zooming). We propose a method that tries to take into account the difficulty to apply the very fast clock in the digital zooming unit of an ISP system. The ISP system hardware is realized in the FPGA and the zooming algorithm is parabola interpolation architecture. This paper presents an optimization method by using a synchronization FIFO to greatly reduce the clock frequency of the digital zooming unit, and by this the power consumption is also decreased significantly.

Abstract: Point cloud registration is necessary to acquire full-view data in coded SL three-dimensional measurement, based on single-view measured data. Aiming at surface feature of metal parts or human body, matching point pair construction principle, and transition matrix optimization method are analyzed. First, auxiliary-stereo-target registration principle and device are presented to establish matching point pair, and least-squares ill solution and iterative misconvergence caused by coplanar matching points can be avoided. Second, ICP method is adopted for acquiring transition matrix, and then mismatch point pair rejection method based on orthogonal Gray code principle is designed to increase iterative convergence. Experimental results show, registration error is about 0.8mm, close to that of global camera method and higher than that of surface method. This method has no influence on measured surface, and simplifies measurement device.