In an interesting article ([1], p. 70) Ramamoorthy has been shown a new method for computing the transfer functions in a linear discrete system. Although the basic idea of the method is clear, the derivation thereof is obscure and the results are given in a poorly applicable form being not stated explicitly. Moreover, many superfluous mutually cancelling terms appear in the resulting expression...

Manual opacity transfer function editing for volume rendering can be a difficult and counter-intuitive process. This paper proposes a logarithmically scaled editor, and argues that such a scale relates the height of the transfer function to the rendered intensity of a region of particular density in the volume almost directly, resulting in much improved, simpler manual transfer function editing.

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In computer assisted diagnostics nowadays, high-value 3-D visualization intake a supporting role to the traditional 2-D slice wise visualization. 3-D visualization may create intuitive visual appearances of the spatial relations of anatomical structures, based upon transfer functions mapping data values to visual parameters, e.g. color or opacity. Manual definition of these transfer functions h...

In previous studies of formant frequency discrimination, variation in the stimuli has mainly concerned the formant frequencies while other factors which may affect formant frequency discrimination have largely been ignored. In most studies, fundamental frequencies typical of adult male speakers have been used. In the study presented here, formant frequency discrimination as a function of fundam...

Abslmct-In an overparametrized model reference adaptive control & r ) = dt)r(') system, the measured signal n(t) cannot he persistently exciting (PE) I + rT(r )r ( t ) for any hounded reference input r ( t ) . The controller parameter vector for model-plant transfer function matching lies in a linear variety in the where = y ( t ) ~ y , , 3 ( t ) p ( t ) { ( t ) ~ , ( ~ ) p ( r ) ~ ( r l ,...

Critical examination of the slanted-edge method for color SFR measurement reveals inaccuracies in the estimated SFR, due to the use of demosaicing. The proposed method resolves these inaccuracies by eliminating the need for demosaicing during SFR measurement. OCIS codes: (110.4100) Modulation transfer function; (110.4850) Optical transfer functions

We present conditions which are necessary and sufficient for a transfer function (or transfer function matrix) to be strictly positive real. A counter example is given to illustrate that, in the rational matrix case, the conditions presented here differ from those previously presented in the literature, and that these same conditions represent an incomplete characterization of strict positive r...

Chaos in a fractional-order jerk model using hyperbolic tangent nonlinearity is presented. A fractional integrator in the model is approximated by linear transfer function approximation in the frequency domain. Resulting chaotic attractors are demonstrated with the system orders as low as 2.1.