Check out this month’s instructional video—“Red reflex.” Testing the red reflex is a simple and efficient way for FPs and pediatricians to rapidly screen children for ophthalmic conditions that, if left untreated, could lead to irreversible visual loss, blindness, and even death. By using a direct ophthalmoscope, readily available in the primary care physician’s office, the practitioner illumin...

Perceptual video compression has been increasingly utilized to obtain higher compression gains by removing perceptual redundancies according to the Human Visual System (HVS). Due to non-linear complex mechanisms of the HVS, conventional quality metrics fail to assess the performance of perceptual video compressors. Therefore, subjective assessment is employed as the most reliable method for thi...

ad hoc networks are multi-hop wireless networks without a pre-installed infrastructure. such networks are widely used in military applications and in emergency situations as they permit the establishment of a communication network at very short notice with a very low cost. video is very sensitive for packet loss and wireless ad-hoc networks are error prone due to node mobility and weak links. h...

The trend towards video streaming with increased spatial resolutions and dimensions, SD, HD, 3D, and 4kUHD, even for portable devices has important implications for displayed video quality. There is an interplay between packetization, packet loss visibility, choice of codec, and viewing conditions, which implies that prior studies at lower resolutions may not be as relevant. This paper presents...

Face image quality can be defined as a measure of the utility of a face image to automatic face recognition. In this work, we propose (and compare) two methods for learning face image quality based on target face quality values from (i) human assessments of face image quality (matcher-independent), and (ii) quality values computed from similarity scores (matcherdependent). A support vector regr...

Face image quality can be defined as a measure of the utility of a face image to automatic face recognition. In this work, we propose (and compare) two methods for automatic face image quality based on target face quality values from (i) human assessments of face image quality (matcher-independent), and (ii) quality values computed from similarity scores (matcher-dependent). A support vector re...

Nowadays, with the continuous rise of Internet-based multimedia services, such as video sharing websites, web radios and IP-based telephony, multimedia communications are gaining more and more popularity. From the service provider's perspective, there is an increasing need in providing high-quality content; at the same time, from the network provider's view, the requirement is to design network...

Open online distance learning in higher education has quickly gained popularity, expanded, and evolved, with Massive Open Online Courses (MOOCs) as the most recent development. New web technologies allow for scalable ways to deliver video lecture content, implement social forums and track student progress in MOOCs. However, we remain limited in our ability to assess complex and open-ended stude...