This paper studies how to provide support for ballot-level post-election audits. Informed by our work supporting pilots of these audits in several California counties, we identify gaps in current technology in tools for this task: we need better ways to count voted ballots (from scanned images) without access to scans of blank, unmarked ballots; and we need improvements to existing techniques t...

An image-based model reconstruction system is described in this paper where real images of a rigid object acquired under a simple but controlled environment are used to recover its three dimensional geometry and its surface texture. Based on a multi-image calibration method, an algorithm to extract the rotation axis of a turn-table has been developed. Furthermore, this algorithm can be extended...

Methods 150 consecutive subjects with suspected CAD completed paired vasodilator stress/rest perfusion MRI on a 1.5 Tesla scanner and coronary CT angiogram on a 320-slice scanner. Primary study endpoints are overall MOCO image quality categorized as excellent, good, fair, and poor based on type and extent of image artifacts and the diagnostic accuracy of MOCO stress/rest perfusion images. Both ...

ATLAS (Advanced Technology Laboratory Animal Scanner), a small animal PET scanner designed to image animals the size of rats and mice, is about to enter service on the NIH campus in Bethesda, Maryland. This system is the first small animal PET scanner with a depth-ofinteraction capability and the first to use iterative resolution recovery algorithms, rather than conventional filtered back proje...

In digital histopathology traditionally prepared and stained slides are scanned in a dedicated scanner to produce extremely high resolution images.The resultant image fidelity is affected bymany variables including the staining processes, scanner design/setup, and ultimately the image display. Little or no routine quality control is applied at any of these stages and as a result widely varying ...

Since 2002 the Commonwealth Science and Industrial Research Organisation (CSIRO) has been working with the Australian Customs Service to develop a scanner capable of directly imaging airfreight containers in 1-2 minutes [1-4]. The scanner combines fast neutron and gamma-ray radiography (FNGR) to provide high-resolution images that include information on material composition. By collecting trans...

Digital images can be captured or generated by a variety of sources including digital cameras and scanners. In many cases it is important to be able to determine the source of a digital image. This paper presents methods for authenticating images that have been acquired using flatbed desktop scanners. The method is based on using the pattern noise of the imaging sensor as a fingerprint for the ...

A novel method for intra-operative data acquisition using a laser range scanner is presented for applications in model-updated image-guided surgery. The scanner produces a point cloud containing true-color encoded range data of its field-of-view. This allows characterization of intra-operative conditions using both intensity and geometry information. Furthermore, a rigid-body registration algor...

Digital images can be captured or generated by a variety of sources including digital cameras and scanners. In many cases it is important to be able to determine the source of a digital image. Methods exist to authenticate images generated by digital cameras or scanners, however they rely on prior knowledge of the image source (camera or scanner). This paper presents methods for determining the...