INTRODUCTION Every imaging system starts with an image sensor. The signal from the sensor must be processed in the analog domain, converted to digital, and further processed in the digital domain. This allows the image to be analyzed, manipulated, and enhanced, prior to storage, display, transmission, and/or further processing. Imaging applications typically involve three chips—an image sensor,...

In order to better understand and exploit the rich information content of new remotely sensed datasets, there is a need for comparative land cover classification studies. In this study, the automatic classification of a suburban area was investigated by using (1) digital aerial image data; (2) digital aerial image data and laser scanner data; (3) a high-resolution optical QuickBird satellite im...

In this paper, a 3D scanner, based on tracking a laser stripe by a stereo vision sensor, is presented. The system is composed of a pair of digital cameras, a laser stripe generator and software to control the hardware and process the images. The measurement procedure is based on detecting laser stripe locations in the digital images with subpixel resolution. Stereo vision principles are then us...

combined pet/ct scanners now play a major role in medicine for in vivo imaging in oncology, cardiology, neurology, and psychiatry. as the performance of a scanner depends not only on the scintillating material but also on the scanner design, with regards to the advent of newer scanners, there is a need to optimize acquisition protocols as well as to compare scanner performances on an objective ...

The airborne imaging system DORIS has undergone significant advancements since its first development in 1996 at Alberta Research Council, Alberta Canada. The system, which combines a laser scanner digital elevation model with simultaneously captured digital images, is used primarily to produce highly accurate high-resolution ortho-rectified image map for Forest Inventory and Management System. ...

Bacterial colony counting is a significant technical hurdle for vaccine studies as well as various microbiological studies. We now show that an automated colony counter can process images obtained with a digital camera or document scanner and that any laboratory can efficiently have bacterial colonies enumerated by sending the images to a laboratory with a colony counter via internet.

This paper describes direct interactive relative orientation method between terrestrial digital images and laser scanner data. Traditionally, the orientation between images and 3D data requires interactive work and accurate reference points or visible features. Laser scanning data does not easily allow detection of breaklines or corner points. Due to the huge amount of data, however, it is poss...

In this paper, we introduce a novel approach intended to simplify the production of multimedia content from real objects for the purpose of knowledge sharing, which is particularly appropriate to the cultural heritage field. It consists in a pipeline that covers all steps from the digitization of the objects up to the Web publishing of the resulting digital copies. During a first stage, the dig...

INTRODUCTION A significant barrier to medical diagnostics in low-resource environments is the lack of medical care and equipment. Here we present a low-cost, cloud-connected digital microscope for applications at the point-of-care. We evaluate the performance of the device in the digital assessment of estrogen receptor-alpha (ER) expression in breast cancer samples. Studies suggest computer-ass...

Objective The objective of the present study was to compare patients' acceptability, comfort and stress with conventional and digital impressions. Materials and Methods Thirty young orthodontic patients (15 males and 15 females) who had no previous experience of impressions were enrolled in this study. Conventional impressions for orthodontic study models of the dental arches were taken using...