Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
1999-02-16
2001-01-23
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S070000, C702S074000, C702S193000, C382S256000, C382S257000
Reexamination Certificate
active
06178387
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to field of signal processing. More specifically, the present invention relates to a method for the determination of peaks in a discrete signal.
BACKGROUND
Discrete signals or functions, such as image histograms or discrete digital information signals, for example, are comprised of a series of discrete components or values. Each discrete component of a discrete signal represents a specific segment of data or data value associated with the discrete signal. Therefore, each discrete component contained in the discrete signal is used to convey different information or data represented within the discrete signal.
In particular, peaks or informational peaks contained within discrete signals are generally used to convey different information or types of information. For instance, the informational peaks may be used to classify a particular discrete signal as conveying a particular type of information or data. Alternately, the informational peaks themselves may convey a particular type of information or data.
In operation, however, discrete signals may become distorted due to noise interference or other interference (e.g., electrical, magnetic, spectral, etc.), which results in the distortion of the discrete signal. Such interference can result in a series of interference induced spikes, also referred to as “false peaks”, being introduced into the discrete signal which are attributable to the interference. As such, the interference induced spikes or “false peaks” may convey false information or data as a result of the interference.
In such applications, such as image processing for example, the interference induced spikes or “false peaks” introduced in a representative discrete signal (e.g., image histogram) may result in the erroneous classification or processing of an image. Therefore, the interference induced spikes may convey false information regarding the type of data contained within the discrete signal.
It is therefore desirable to provide a technique for determining the valid informational peaks contained within a discrete signal from any interference induced spikes that may be introduced into, or contained in, the discrete signal.
SUMMARY OF THE INVENTION
An embodiment of the present invention provides for a method and computer readable medium for determining peaks in a discrete function. Initially, a closing function is applied to the discrete function to generate a closed discrete function. The peaks within the closed discrete function are then defined. Next, the defined peaks are sorted according to function value. Subsequently, a threshold is applied to each sorted defined peak in individual succession, wherein sorted defined peaks having a peak height value above the threshold value are retained within the closed discrete function.
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Blakely , Sokoloff, Taylor & Zafman LLP
Bui Bryan
Hoff Marc S.
Sony Corporation
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