35 results about "Peak finding" patented technology

A correlation function peak finding method for an image correlation displacement sensing system is provided. The method may include capturing a reference image and a displaced image, and searching for an initial peak correlation function value point (CFVP) with pixel-level resolution based on correlating the reference image and displaced images at a plurality of offset positions. Then a complete set of CFVPs may be determined at each offset position in an analysis region surrounding the initial peak CFVP. Then a preliminary correlation function peak location is estimated with sub-pixel resolution, based on CFVPs included in the analysis region. Finally, curve-fitting operations are performed to estimate a final correlation function peak location with sub-pixel accuracy, wherein the curve-fitting operations apply a windowing function and / or a set of weighting factors that is / are located with sub-pixel resolution based on the preliminary sub-pixel correlation function peak location.

In one embodiment, a method for automatically determining a position of one or more calorimetric peaks in a set of calorimetric data is provided. The method comprises a) providing a non-linear fit for the calorimetric data, b) calculating a residual by subtracting the non-linear fit from the calorimetric data, c) calculating an error based on the residual, d) comparing the error with a predetermined error, and e) providing another non-linear fit if the error is greater than the predetermined error.

A breakaway interface between radiological information systems, imaging equipment and picture archive and communications systems has automated filtering and handling of multiple study work orders or affiliated work orders, while passing single study work orders through unaltered. The work orders are processed by the breakaway interface to consolidate multiple procedure or multiple study work orders into a single super order, which is then communicated, preferably using DICOM standard protocol, to an imaging machine. The imaging machine returns a single image sequence, and the breakaway interface will then break images away from the single image sequence into a plurality of grouped image sequences. The preferred grouping is based upon anatomical regions, and separate but adjacent anatomical regions will preferably share one or more images at the boundary between the adjacent regions. The exact number of shared images may preferably be preset at the system level. A number of different techniques for analyzing the single image sequence are proposed individually or in combination, including histogram analysis, peak finding techniques, moments of order analysis, evaluating information from one or more previous analyses, and evaluating image sequence series information to distinguish discrete imaging procedures.

The invention discloses a Brillouin spectrum peak finding method based on incomplete spectrum splicing. The peak frequency of the real Brillouin spectrum is obtained on the basis of the incomplete spectrum by splicing data after measurement. The invention makes up for the insensitivity of the BOTDR to rapidly changing external disturbances, improves the sensing effect of the BOTDR in extreme environments, and is of great significance to practical engineering applications.

A method for localizing for GPS denied environments is provided with a plurality of broadcasting transmitters and a software-defined radio (SDR). A pre-processing stage and a query phase is executed for localizing an unknown location. The results from the preprocessing stage are made available to the query stage. A simulated power spectrum is computed for a region of interest during the pre-processing phase via the plurality of broadcasting transmitters. A transmitter location, a radius of influence, and a power contour plot of each of the plurality of broadcasting transmitters are used for computing the simulated power spectrum. Next, a peak-finding process, a filtering process, and a localization process is executed during the query phase in order to identify the unknown location.

The invention discloses a rapid peak searching method for radioactive material detection in the seawater. The method comprises the steps of collecting the data of all channels of a radioactive sensorwithin three hours; processing each data value, and filtering out interference data; ranking all data points in an interval according to the interval corresponding to all the data points in the rangeof the peak possible existence range of a preset nuclide, and selecting a data point with the largest numerical value as a preset peak value; searching valley points closest to numerical values at theleft side and the right side of the preset peak value and calculating to obtain boundary positions; respectively judging the monotonicity of data points on the left side and the right side, and judging the correctness of the peak searching; if peaks on the left side and the right side of the peak value are true peaks, ending the peak searching; if anyone of the peaks on the left side and the right side of the peak value is a false peak, judging that no peak of the radionuclide is found out and ending the peak searching. According to the peak searching method disclosed in the invention, the interval range of nuclide distribution can be rapidly and accurately found out. The accuracy and the real-time performance of the measurement result of radioactive materials in the seawater are improved.

The invention discloses a pulse amplitude measurement circuit and method for reducing counting losses. The related circuit includes: a shaping amplifier circuit, which is used to widen the random pulse signal output by the nuclear detector into a pulse shape with a flat top that is convenient for amplitude measurement, and Amplify the signal amplitude and output; high-speed AD conversion circuit, used to continuously sample the pulse signal output by the forming amplifier circuit and convert it into digital output; fast peak-seeking and discharge control circuit, used for high-speed AD conversion circuit output Calculate the amplitude of the digital signal waveform, store it after the amplitude calculation is completed, and output the discharge control signal to the signal fast recovery circuit; the signal fast recovery circuit is used to control the forming amplifier circuit according to the received discharge control signal The amplitude of the output pulse returns to the baseline level. The circuit and method disclosed by the invention can reduce the counting rate loss caused by the accumulation effect of the nuclear pulse signal under the condition of high counting rate, and the circuit structure is simple and reliable, and is easy to popularize.

The invention relates to a multi-peak self-adaption accurate peak searching method for a distributed FBG (Fiber Bragg Grating) sensing network and belongs to the technical field of signal processing of optical fiber sensing systems. The method comprises the following steps: smoothening a spectral signal by using a five-point sliding mean filtering method to eliminate the influence of signal noise on peak searching accuracy; processing the smoothened spectral signal by utilizing Hilbert conversion to obtain an initial peak positioning point of a multi-peak spectral signal; performing Gabor filtering on the smoothened signal to obtain a division point of a left sideband of a spectrum, and symmetrically obtaining a right division point of a spectrum peak by virtue of the initial peak positioning point; performing peak value area division on a multi-peak spectrum by taking the left and right division points of the spectrum as a boundary; integrating the divided spectrum peak by taking an initial positioning peak value point as the center to obtain the areas of a left half peak and a right half peak, and judging the offset situation of the spectrum peak by comparing the sizes of the left half peak and the right half peak; performing accurate peak searching on each spectrum peak by using an index correction Gauss fitting algorithm to obtain a multi-peak accurate peak value point by virtue of the peak shape of the spectrum peak. The method can be used for self-adaption peak value area division of the multi-peak spectral signal of the distributed sensing network and high-accurate peak value positioning.

In one embodiment, a method for automatically determining a position of one or more calorimetric peaks in a set of calorimetric data is provided. The method comprises a) providing a non-linear fit for the calorimetric data, b) calculating a residual by subtracting the non-linear fit from the calorimetric data, c) calculating an error based on the residual, d) comparing the error with a predetermined error, and e) providing another non-linear fit if the error is greater than the predetermined error.