Random computing method for importance degree of wavelet coefficient of two-dimensional image
A technology of importance degree and wavelet coefficient, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as roughness, and achieve the effect of accurate control
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[0018] The present invention will be further described below in conjunction with accompanying drawing.
[0019] The invention provides a convenient stochastic simulation method to calculate the importance degree of each coefficient of the image in the wavelet domain. Concrete steps vary with computing environments, and the concrete steps of the inventive method are:
[0020] Step (1). Initialization is a 0 matrix, and its number of rows and columns is the same as unanimous.
[0021] Step (2). Generate a random matrix r , whose number of rows and columns is the same as Consistent, its elements obey the uniform distribution on (-1,1).
[0022] Step (3). Order , where sgn is the sign function, Represents element-wise multiplication.
[0023] Step (4). Yes Perform wavelet transform W get : .
[0024] Step (5).Update : for each position p ,in representation matrix in position p element at.
[0025] Step (6). If no longer changes, then end, output ...
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