Given a blurred image of a known test grid and an accurate estimate of the unblurred image, it has been demonstrated that the underlying blur kernel (or point-spread function, PSF) can be reliably estimated. Unfortunately, the estimate of the sharp image can be sensitive to common imperfections in the setup used to obtain the blurred image, and errors in the image estimate result in an unreliab...

A precursor of phagocytosis-stimulating factor (PSF) was identified by immunoblot assay with purified anti-PSF antibodies. The purified anti-PSF antibodies recognized not only the PSF with a molecular weight of 16,000 (16K) but also the 36K protein with a pI of 6.5 in the granule fraction of polymorphonuclear neutrophils, indicating that this 36K protein has an antigenic determinant common to P...

BACKGROUND PET reconstruction incorporating spatially variant 3D Point Spread Function (PSF) improves contrast and image resolution. "Cardiac Motion Frozen" (CMF) processing eliminates the influence of cardiac motion in static summed images. We have evaluated the combined use of CMF- and PSF-based reconstruction for high-resolution cardiac PET. METHODS Static and 16-bin ECG-gated images of 20...

Prostacyclin (PGI2) synthesis by vascular endothelial cells (ECs) decreases in diabetic subjects, possibly leading to development of diabetic angiopathies including that in atherosclerosis. We identified a bioactive peptide, prostacyclin-stimulating factor (PSF), which stimulates PGI2 synthesis in cultured aortic ECs. Our previous studies demonstrated that PSF was predominantly expressed by art...

Abstract Wide-field small aperture optical telescopes are widely used in large-scale surveys currently and they have made great contributions a number of astronomical applications. However, specific challenges arise owing to the defects caused by system, image quality reduction precision negatively affected. An innovative method is proposed address these achieve high-precision source intensity ...

ABSTRACT We investigate cosmological parameter inference from realistic simulated weak lensing image data using only galaxy position angles, as opposed to full-ellipticity information. demonstrate that input shear fields can be accurately reconstructed the statistics of source angles and that, these fields, we successfully recover power spectra infer cosmology. This paper builds on previous wor...

We demonstrate an integrated holographic optical tweezers system with double-helix point spread function (DH-PSF) imaging for high precision three-dimensional multi-particle tracking. The tweezers system allows for the creation and control of multiple optical traps in three-dimensions, while the DH-PSF allows for high precision, 3D, multiple-particle tracking in a wide field. The integrated sys...

Photocatalytic membranes exhibit great potential for water treatment since they combine the filtration and photo degradation in a single unit. Although blending photocatalytic nanoparticles into polymeric thin film remains the simplest method to prepare the photocatalytic membrane, the entrapped photocatalyst showed less catalytic activity due to the agglomeration and shielding effects in the p...

We have shown that the left side null space of the autoregression (AR) matrix operator is the lexicographical presentation of the point spread function (PSF) on condition the AR parameters are common for original and blurred images. The method of inverse PSF evaluation with regularization functional as the function of surface area is offered. The inverse PSF was used for primary image estimatio...