Download e-book for kindle: Correlation Pattern Recognition by B. V. K. Vijaya Kumar

By B. V. K. Vijaya Kumar

ISBN-10: 0521571030

ISBN-13: 9780521571036

Correlation is a strong and normal procedure for trend attractiveness and is utilized in many purposes, similar to computerized aim acceptance, biometric popularity and optical personality attractiveness. The layout, research and use of correlation trend acceptance algorithms calls for history info, together with linear platforms idea, random variables and approaches, matrix/vector equipment, detection and estimation idea, electronic sign processing and optical processing. This booklet offers a wanted evaluation of this varied history fabric and develops the sign processing conception, the development acceptance metrics, and the sensible program knowledge from simple premises. It indicates either electronic and optical implementations. It additionally comprises expertise offered through the staff that constructed it and comprises case reviews of vital curiosity, akin to face and fingerprint reputation. compatible for graduate scholars taking classes in development acceptance thought, while achieving technical degrees of curiosity to the pro practitioner.

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However, they can be selected to be orthogonal. One example of the case of repeated eigenvalues is the identity matrix whose eigenvalues are all equal to 1. , [000100 . . 0]) as the eigenvectors. Let E denote a square matrix whose columns are ei, the normalized eigenvectors, and let L denote a diagonal matrix whose diagonal entries are the N eigenvalues. Then Eq. , A ¼ ET. If y ¼ Ax, then the new covariance is a diagonal matrix as shown below. CY ¼ ACX AT ¼ ET CX E ¼ ET EL ¼ L ¼ Diagfl1 ; l2 ; : : : ; lN g (2:108) Thus, using A ¼ ET results in new RVs y that are uncorrelated since the new covariance matrix is diagonal.

The variance 2 of an RV is defined as follows: n o Z 2 ¼ E ðX À mÞ2 ¼ ðx À mÞ2 f ðxÞdx ¼ Z x2 f ðxÞdx À 2m Z xf ðxÞdx þ m2 Z f ðxÞdx È É È É ¼ E X 2 À 2m2 þ m2 ¼ E X 2 À m2 (2:85) We have omitted the integration limits in the above expression since they are from À1 to þ1, as should be obvious from the context. Often, mean and variance prove to be adequate descriptors for an RV, although they do not necessarily provide a complete description. Moments for Gaussian PDF For the Gaussian PDF in Eq.

Together), we can use the joint CDF defined below. F ðx; yÞ ¼ PrfX x; Y yg (2:86) The joint CDF describes the joint random behavior of the two RVs, not just of each RV by itself, and in that sense is more informative. The joint CDF is nonnegative, non-decreasing and must approach 1 as both x and y approach infinity. Similarly, the CDF is zero if either x or y approaches negative infinity. Joint PDF RVs X and Y can be described using a joint PDF that is related to the joint CDF as below. q2 F ðx; yÞ f ðx; yÞ ¼ qxqy (2:87) Since the joint CDF is non-decreasing, the joint PDF must be non-negative.

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Correlation Pattern Recognition by B. V. K. Vijaya Kumar


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