We investigate the influence of the finite spatial resolution of a typical 4f pulse-shaping setup in a single- and double-pass configuration on the shaped waveforms. Specifically, we calculate and measure the space-frequency distribution at the focal plane of a lens following the shaping setup and show that steep amplitude or phase jumps, as they appear with pixelated spatial light modulators, ...

Abstract. The realism of VR visualisation is diminished when images look pixelated or forms are faceted instead of smooth. What constitutes acceptable visual quality by viewers? This paper presents the survey results of what is the acceptable visual quality of triangle complexity and texture resolution for full-size VR visualisation on a large screen and serves as a guide to create VR models mo...

We describe an eeective approach to object or feature detection in point patterns via noise modeling. This is based on use of a redundant or non-pyramidal wavelet transform. Noise modeling is based on a Poisson process. We illustrate this new method with a range of examples. We use the close relationship between image (pixelated) and point representations to achieve the result of a clustering m...

Abstract Hierarchical and periodic nanostructures of dielectrics or metals are highly demanded for wide applications in optical, electrical, biological, quantum devices. In this work, programmable plasmonic–photonic hierarchical fabricated using a facile effective method with high controllability stable reproducibility. The fabrication involves colloidal self-assembly, metal film deposition, pu...

Touch, such as a caress, can be interpreted as very pleasant. The emotional valence assigned to touch is likely related to certain bottom-up factors, such as optimal activation of C-tactile (CT) afferents. It is however unclear if besides somatosensory input, contextual factors related to the own body also play a role in the perceived pleasantness of touch. To test this, we manipulated visual a...

We have previously demonstrated the potential of multi-pinhole coded apertures when used in conjunction with compact pixelated detectors for high resolution, high sensitivity small animal SPECT. We are now constructing a prototype SPECT system with three such detectors mounted on a rotating gantry. Each detector comprises a 12 cm diameter circular array of NaI(Tl) crystals, each 1x1x5 mm3 on a ...

A 3-dimensional position sensitive CdZnTe gamma-ray spectrometer based on VAS3.1/TAT3 ASICs was developed and tested. The 3-D CZT spectrometer employs a 1.5 × 1.5 × 1 cm CdZnTe crystal with 11 by 11 pixelated anodes wire-bonded to the readout electronics. The signals from the anode pixels and the cathode were both read out through the ASICs. The pixel position provides the lateral 2-D coordinat...

We propose and demonstrate the concept of using a tuneable liquid crystal micro-lens (LCML) array to improve the image contrast of a pixelated thin film photo-transistor (TFPT) flat panel imager. Such a device can be used to image contents on paper-based media and display a magnified version on a flat panel display for elderly or visually impaired people. Practical aspects including device phys...

A pixelated silicon detector, developed originally for particle physics experiments, was used a beam profile measurement of cobalt-60 (Co-60) irradiator in water phantom. The compared to measured with pinpoint ionization chamber. differences the pixel detector and chamber relative profiles were within approximately 2% maximum, after calculating correction factors Monte Carlo simulations maximum...

normal 0 false false false en-us x-none ar-sa dear editor i read with interest the study conducted by karrari and colleagues regarding “iranian crystal a misunderstanding of the crystal-meth” published in your journal. [ 1 ] in this study, the authors have explained that the pattern of substances of abuse is varied in different parts of the world , also in iran, and the main ingredient of stree...