The most popular application of holography is using the technique to make three-dimensional images [1]. This paper describes the basic of computationally generating holograms along with integral effect of image processing on hologram. The phrase, “digital holography", is common place in the optics community; it describes the methods used to reconstruct holographic images from physically recorde...

In recent years, still image compression technique plays an important role in many applications such as data transmission and data storage. For speeding up image propagation and reducing image storage efficiently, there are many image compression techniques were proposed. Among them, JPEG2000 is a new generation technique, which can encode images at very low bit-rate with acceptable quality. Be...

An imaging method to obtain arbitrary point-spread functions (PSFs) in phase-encoding dimensions is described. This method, called PSF-Choice, is particularly relevant for applications, such as spectroscopic imaging, in which only a very few phase encodes are acquired and ringing artifact can be a serious problem. PSF-Choice uses partial 2D RF excitations to produce aliased excitations that are...

SiC Schottky Barrier diodes (SiC-SBD) are known to oscillate/ring in the output terminal when used as free-wheeling diodes in voltage source converters. This ringing is due to RLC resonance between the diode capacitance, parasitic resistance and circuit stray inductance. In this paper, a model has been developed for calculating the switching energy of SiC diodes as a function of the switching r...

We provide background information to allow a heuristic understanding of two types of criteria used in selecting a model for making inferences from ringing data. The first type of criteria (e.g., AIC, AIC, QAIC and TIC) are estimates of (relative) Kullback-Leibler information or-distance and attempt to select a good approximating model for inference, based on the Principle of Parsimony. The seco...

Alarm bells have been ringing around the world about the decline in number of many amphibian populations and a new global study deepens concerns about the future of many species. Nigel Williams reports.

Various medical image compression techniques have been proposed for accelerating image propagation in many applications. JPEG2000 is a new generation technique that can encode near lossless ultrasound images at medium bit-rate with diagnostically acceptable quality. Because the coder of JPEG2000 is based on wavelet transform, the reconstructed image will contain some ringing artifacts. Some de-...