GPU Pro 5

474 VI Compute

Figure 5.4. A 1D quadrature filter; the real part (green) is a line detector (a cosine

modulated with a Gaussian window) and the imaginary part (blue) is an edge detector

(a sine modulated with a Gaussian window).

and six edge detectors). The Morphon [Knutsson and Andersson 05] is an image

registration algorithm that uses quadrature filters to estimate the displacement

between two images or volumes. To improve the registration, estimation of a

structure tensor is performed in each iteration, thus requiring an efficient imple-

mentation of filtering. Monomial filters [Knutsson et al. 11,Eklund et al. 11] are

a good example of filters appropria ...