Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved IIR Low-Pass Smoothers and Differentiators with Tunable Delay   Regression analysis using orthogonal polynomials in the time domain is used
to derive closed-form expressions for causal and non-causal filters with an
infinite impulse response (IIR) and a maximally-flat magnitude and delay
response. The phase response of the resulting low-order smoothers and
differentiators, with low-pass characteristics, may be tuned to yield the
desired delay in the pass band or for zero gain at the Nyquist frequency. The
filter response is improved when the shape of the exponential weighting
function is modified and discrete associated Laguerre polynomials are used in
the analysis. As an illustrative example, the derivative filters are used to
generate an optical-flow field and to detect moving ground targets, in real
video data collected from an airborne platform with an electro-optic sensor.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga