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  • Charge-coupled photosensitive devices based image pre-processing system

    In this paper, we propose a method for expanding the functional range of image pre-processing systems (LUTs) and increasing sensitivity by reducing processing time. The main advantage of the implementation of preprocessing at FPSS is the implementation of spatio-temporal discrete-analog processing simultaneously with image formation. A disadvantage of the known methods for implementing image pre-processing systems is the low performance of the LDPE due to the fact that the processing is carried out step by step and the number of cycles is always the maximum regardless of the observation conditions. The purpose of the work is to expand the functional range of software and increase sensitivity, by reducing processing time. This goal was achieved by combining processing for the symmetric coefficients of the impulse response of a non-recursive filter. To assess the possibilities of improving the speed of the proposed processing method, noise suppression modeling on an X-ray image was simulated using low-pass filters with masks of size,,. Based on the difference between the original and processed images, it was concluded that the use of a mask is advisable. The use of a new processing method with a mask of dimension will allow to increase the performance by 2.778 times and, accordingly, the sensitivity of the software with 1.339 times.

    Keywords: pre-processing, spatio-temporal, images, charge-coupled photosensitive devices, non-recursive filter

  • Adaptive cuff-free method of measuring blood pressure

    Non-invasive cuff-free methods of blood pressure measurement are being developed actively that will make measuring in everyday life conditions comfortable. The method offered includes 4 steps: choice of a finger, calculation of a generalized skin option, presetting and measuring. To improve the accuracy of measurements, the finger with the greatest temperature sensitivity was revealed and the value of generalized skin option was defined during the experimental verification. In accordance with the developed algorithm the presetting step is meant to determine the coefficient of proportionality which is necessary for measuring blood pressure. This method enables the increase of accuracy of measurements due to taking into account the adaptation to changes in the ambient temperature and individual skin options.

    Keywords: control, blood pressure, temperature, distal phalanges, blood, environment, skin option

  • Working temperature model of the distal phalanges suitable for evaluating blood pressure

    Currently, there is a tendency to develop not cuff methods of blood pressure measurement, which reduces discomfort in the measurement and to ensure continuous monitoring of blood pressure. The proposed model allows us to estimate the temperature of the distal phalanges (DPF) and, therefore, blood pressure, both in stationary conditions and during the transients. As a result of experimental verification of the model demonstrated that the average value of the DPF temperature repeats the law of change in mean arterial pressure, and transient changes in temperature during the DPF blood pressure change and the ambient temperature are independent and subject to an exponential law.

    Keywords: control, blood pressure, temperature, distal phalanges, blood, environment.

  • Multispectral optical method formation and image processing formation at low contrast hypodermic priori uncertainty skin parameters

    The advanced multispectral method is developed for formation and recovery of the image of a hypodermic on the basis of function of a detuning and its algorithm realizing. The method reduces distorting influence of change of characteristics of skin on image formation. Use of function of a detuning allows to make processing without observance of rigid requirements to the accuracy of a choice of lengths of waves on which images and, respectively, providing a preset value of the relation of values of optical thicknesses of skin are formed.

    Keywords: Restore images, multispectral method, the function of detuning, the optical thickness, the reflection coefficient