The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a novel bioimpedance emulation method designed for electrical impedance tomography system validation. The proposed method can emulate the impedance frequency characteristics of various biological samples from user configurations. The bioimpedance emulation system is realized in a hardware prototype comprising current sensing circuitry, voltage generating circuitry, a USB controller...
According to the infrared imaging mechanism, this paper proposes a Nonuniformity Correction(NUC) enhancement method to improving the image quality of Infrared system. analyzing the connection between the responsivety and the nonuniformity of each pixel on infrared focal plane array (IRFPA), gain and offset coefficients were updated gradually, calculating the image of a scene threshold gray level information,...
This paper presented the design method of a digital-controlled variable voltage source with current monitor function. The hardware of system mainly consists of FPGA, DAC, programmable gain amplifier, current sensing circuit and comparator. By using high-speed analog comparator to convert over-current time to length of digital pulse, the FPGA could monitor the amplitude of current dynamically. In aspect...
This paper presented the design method of a novel digital phantom for electrical impedance tomography system calibration. By current sensing, voltage generating circuitry and digital processing algorithms implemented in FPGA, the digital phantom can simulate different impedances of tissues. The hardware of the digital phantom mainly consists of current sensing section, voltage generating section,...
This paper presented a high speed data acquisition system for real-time appLication. The hardware of system mainly consists of data acquisition, distribution and storage section. A 3Gsps ultra high-speed ADC is appLied in acquisition section. In distribution section, the original data stream will be distributed into four streams. Each data stream will be stored into one soLid-state storage card which...
A critical step in fingerprint recognition is to skeletonize the fingerprint image for minutiae extraction, which is recognized as "thinning" in image processing. The speed and reliability of the thinning process are important for the whole fingerprint identification system. In this paper, to accelerate the thinning process, a fast hardware thinning algorithm is implemented on the Xilinx...
In order to improve the subdivision precision and speed of grating moire fringe and meet the nanometer measurement requirement of grating displacement, the paper studies a new phase detection method that is the core technology of the classical phase-locked subdivision method and phase detection subdivision method. First, the output signal of grating sensor modulates the phase of the high frequency...
Image scaling plays an important role in digital image processing. It is widely applied in all sorts of display terminals. A new scaling method was proposed in this paper. The method combines traditional nearest neighbor and bilinear methods in a simple but effective way. The hybrid algorithm was discussed based on analysis of its idea origin. Multiple input interpolation method was put forward for...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.