Abstract
Estimation of differentials of discrete signals is almost mandatory in digital segmentation. We present a new fast method based on convolutions by a mask with a logarithmic number of constant layers. Then we compare it to other multigrid convergent methods in the field such as the Binomial Convolution, the Digital Straight Segment Tangent Estimator, and the Taylor Polynomial Fitting. Our convolution method’s main advantage is its complexity of O(2n.log2(m)), which makes it competitive to the convolution by Fast Fourier Transform (FFT) latest implementation. In the experimental part, we also tested the precision of the first order derivative estimation, its resistance to noise and its convergence rate.
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Gonzalez, D., Malgouyres, R., Esbelin, HA., Samir, C. (2012). Fast Level-Wise Convolution. In: Barneva, R.P., Brimkov, V.E., Aggarwal, J.K. (eds) Combinatorial Image Analaysis. IWCIA 2012. Lecture Notes in Computer Science, vol 7655. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-34732-0_17
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DOI: https://doi.org/10.1007/978-3-642-34732-0_17
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