No Abstract is available

In this paper a method for digitally recording four quarter-reference-wave-holograms (by CCD) in a Mach-Zehnder interferometer setup, and reconstructing the object wave-front by numerical method is presented. The terms of direct transmission, auto-correlation and conjugate wave in the four wave reconstruction are cancelled out and only one original object wave is left after overlapping. Reconst...

Background and Purpose:  Due to the important role of imaging in the diagnosis and treatment plan in orthodontics, CBCT (Cone Beam Computed Tomography) images because of their three-dimensional nature, can minimize the disadvantages of two-dimensional images such as magnification, distortion, or superimposition. The purpose of this study was to evaluate the accuracy of conventional cephalograms...

We present an optoelectronic method to analyze three-dimensional (3D) scenes that is able to detect the presence, and also the position and orientation, of a reference 3D object. The data-acquisition procedure is based on digital holography. A phase-shifting interferometer records a single digital Fresnel hologram of the 3D scene with an intensity-recording device. Holographic information of th...

'The object tracking in video processing technology has been growing for numerous years. Currently, when people are in conversation with their networks through a visual handset or when people use picture propagation through Internet or digital music such as mp3, the suitability that the digital video developed conveys to us cannot be elapsed. This work establishes object tracking for real time ...

nowadays, standard seems to be very important and necessary in all aspects of the life including reference services in libraries. this article is to survey the role of standards in electronic reference services and also considers some sample application instructions which are presented in the dupont- university. by the end, the guide for digital reference services which is called ifla is presen...

The Digital Library Research Group at Cornell has Reference Linking as one of its projects. Typical projects within in the group take an object-oriented approach to handling digital information. To support reference linking, therefore, we designed a scheme whereby reference linking information is extracted from archives by surrogate objects and then presented to client applications or users by ...