INTRODUCTION The number of people in the United States living with dementia is projected to rise to over 7.1 million in the next 12 years, representing a 40% increase from current levels. This anticipated "dementia tsunami" has led to a recent state and national policy emphasis on early detection, improved care quality, reduced caregiver burden, and increased access to care. The ability to achi...

A key factor in designing 3D systems is to understand how different visual cues and distortions affect the perceptual quality of 3D video. The ultimate way to assess video quality is through subjective tests. However, subjective evaluation is time consuming, expensive, and in most cases not even possible. An alternative solution is objective quality metrics, which attempt to model the Human Vis...

This month, Canadian Family Physician is launching a new video series illustrating procedures and assessments that can be useful for family physicians. Check out this month’s instructional video—“Subacromial shoulder injection.” Shoulder pain, local inflammatory conditions, and local pathologies due to soft tissue trauma or repetitive overuse are frequently seen by family physicians. Local inje...

Damage assessment (DA) is an important part of the disaster recovery process, as it helps organizations like the American Red Cross provide assistance and relief to those most affected. Through it, homes are characterized by the damage they have received using five classes ranging from “Unaffected” to “Destroyed”. Rapid acquisition of damage assessment data may be achieved through crowdsourcing...

Video traces containing the sizes and (PSNR) qualities of the individual frames of a video encoding are a convenient video representation for the evaluation of video networking mechanisms. These video traces can be used to find the frame loss probabilities of a lossy networking mechanism, but can not give the PSNR video quality after lossy network transport. To date the video quality after loss...

Lossy video compression algorithms, such as those used in the H.261 and MPEG standards, result in quality degradation seen in the form of tiling, edge busyness, and mosquito noise. The number of bits required to encode a scene so as to achieve a given quality objective depends on the scene content; the more complex the scene is, the more bits are required. Therefore, in order to achieve a given...

Most image and video compression algorithms that have been proposed to improve picture quality relative to compression efficiency have either been designed based on objective criteria such as signal-to-noise-ratio (SNR) or have been evaluated, post-design, against competing methods using an objective sample measure. However, existing quantitative design criteria and numerical measurements of im...

There has been an increasing need recently to develop objective quality measurement techniques that can predict perceived video quality automatically. This paper introduces two video quality assessment models. The first one requires the original video as a reference and is a structural distortion measurement based approach, which is different from traditional error sensitivity based methods. Ex...