This paper presents micropositioning system using feedback of multiple magnification images from CCD cameras mounted on an optical microscope. In order to guarantee of the accurate micropositioning to micro assembly system, high precise sensors are required. But many kinds of sensors, which are used in macro world, have insufficient resolution and size. The visual data from an optical microscop...

OBJECTIVE The purpose of this study was to evaluate the influence of the magnification factor of the radiographic image in angular, linear and proportional measurements. METHODS From a dried human skull where metallic spheres with predetermined size were fixed (1.0 mm), 14 radiographs were obtained in devices from three different manufacturers: Panoura, Instrumentarium and Tomeceph. The Pears...

Introduction: Mini Computed Tomography (mini-CT) was suggested in biomedical research to investigate tissues and small animals. We present designed and built a mini x-ray computed tomography (mini-CT) for small animals as well as industrial component imaging. Materials and Methods: The system used in this study includes a X-ray tube 20kV to 160kV and a flat pa...

For computing the 2 2× magnification matrix of a spectacle lens in front of an eye, there exist well-established methods in the most cases except for the general case of tilted surfaces. In this general case there are in principle two possibilities: either time-consuming numerical calculations have to be performed, or the linear optics approach involving 4 4× transference system matrices has to...

successful root canal treatment requires adequate knowledge regarding morphologic variations in root canal system of teeth. this report describes a six-canalled mandibular first molar with four mesial root canals requiring endodontic retreatment. the two additional canals in the mesial root were found during retreatment with the aid of illumination and magnification. in conclusion, the possibil...

We demonstrate a temporal imaging system based on parametric mixing that allows simple triggering from an external clock by using a time-lens-based pump laser. We integrate our temporal imaging system into a time-to-frequency measurement scheme and demonstrate the ability to perform characterization of temporal waveforms with 1.4-ps resolution and a 530-ps record length. We also integrate our s...

Automated grading of colon biopsy images across all magnifications is challenging because tailored segmentation and dependent features on each magnification. This work presents a novel approach robust magnification-independent cancer framework to distinguish into four classes: normal, well, moderate, poor. The contribution this research develop magnification invariant hybrid feature set compris...