Abstract. Cloud free images are useful for applications where the user is more interested in the visual identification of variability of a phenomenon than in the actual values. The presence of clouds and their shadows hinder the visual interpretation in these applications. Median values in data sets are a better representation of the true value than the average when the data set is contaminated...

Several existing strategies for estimating the axial intensity derivative in the transport-of-intensity equation (TIE) from multiple intensity measurements have been unified by the Savitzky-Golay differentiation filter--an equivalent convolution solution for differentiation estimation by least-squares polynomial fitting. The different viewpoint from the digital filter in signal processing not o...

We describe the implementation of the automatic spatial-frequency-selection filter for recognition of patterns obtained with a digital holographic microscope working with a partially coherent source. The microscope provides the complex-optical-amplitude field that allows a refocusing plane-by-plane of the sample under investigation by numerical computation of the optical propagation. By inserti...

The performance of phase-only optical correlators is usually reduced if the filter-plane phase differs from that prescribed for the classical matched filter. Current spatial light modulators, which frequently produce less than 2π phase modulation, and interface circuits, which quantize or incorrectly amplify signals placed on the spatial light modulator, both can produce systematic phase errors...

With the aim of object tracking in video sequences, we suggest to estimate both the parameters (dynamics, shape) and the state (position), by a sequential Monte-Carlo method, the particle filter. We then model spatial information characterized by a small number of classes by fuzzy sets, which can be fixed or learned. For instance, an information of direction is modeled by four fuzzy sets repres...

Visuospatial attention and gaze control depend on the interaction of foveal and peripheral processing. The foveal and peripheral regions of the visual field are differentially sensitive to parts of the spatial-frequency spectrum. In two experiments, we investigated how the selective attenuation of spatial frequencies in the central or the peripheral visual field affects eye-movement behavior du...