Francescomaria Marino

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—In this paper, we propose two architectures for the direct two–dimensional (2-D) discrete wavelet transform (DWT). The first one is based on a modified recursive pyramid algorithm (MRPA) and performs a " nonstandard " decomposition (i.e., Mallat's tree) of an image in approximately 2 2 3 clock cycles (ccs). This result consistently speeds up other known(More)
3179 [7] T. Yang and K. Yao, " Numerical error control in sliding window systems under finite precision arithmetics, " submitted for publication. [8] T. C. Yang, " Finite precision error control and array implementation of signal processing algorithms, " Ph. Dual-state systolic architecture for recursive least-squares updating and downdating, " in Proc.(More)
—Rail inspection is a very important task in railway maintenance and it is periodically needed for preventing dangerous situations. Inspection is operated manually by trained human operator walking along the track searching for visual anomalies. This monitoring is unacceptable for slowness and lack of objectivity, because the results are related to the(More)
ÐThis paper presents a modular algorithm which is suitable for computing a large class of multidimensional transforms in a general purpose parallel environment without interprocessor communication. Since it is based on matrix-vector multiplication, it does not impose restrictions on the size of the input data as many existing algorithms do. The method is(More)