A comparison of hallux valgus angles assessed with computerised plantar pressure measurements, clinical examination and radiography in patients with diabetes

Background Hallux valgus deformity is a common musculoskeletal foot disorder with a prevalence of 3.5% in adolescents to 35.7% in adults aged over 65 years. Radiographic measurements of hallux valgus angles (HVA) are considered to be the most reproducible and accurate assessment of HVA. However, in European countries, many podiatrists do not...

Using virtual reality to study paranoia in individuals with and without psychosis

A virtual reality environment was created to study psychotic symptoms of patients that experience psychosis. In the environment people could navigate through a bar with a gamepad while wearing a head mounted display. Their task was to find five virtual characters that have a small label number on their chest. The density and ethnic appearance of...

An argumentation framework for deriving qualitative risk sensitive preferences

Preferences are derived in part from knowledge. Knowledge, however, may be defeasible. We present an argumentation framework for deriving qualitative, multi-attribute preferences and incorporate defeasible reasoning about knowledge. Intuitively, preferences based on defeasible conclusions are not as strong as preferences based on certain...

Human Handheld-Device Interaction: An Adaptive User Interface

The move to smaller, lighter and more powerful (mobile) handheld devices, whe-ther PDAs or smart-phones, looks like a trend that is building up speed. With numerous embedded technologies and wireless connectivity, the drift opens up unlimited opportunities in daily activities that are both more efficient and more exciting. Despite all these...

Sensing what matters

Recently, the Royal Netherlands Navy (RNLN) is executing missions in coastal regions with a lot of civil traffic. Furthermore, the opponent of a typical modern mission is not as apparent as was the case during e.g., the Cold War. In the direct vicinity of naval vessels are many objects and it is increasingly complex to identify which of those...

No-Reference image quality assessment based on localized gradient statistics: Application to JPEG and JPEG2000

Studying the effect of optimizing the image quality in saliency regions at the expense of background content

Manufacturers of commercial display devices continuously try to improve the perceived image quality of their products. By applying some post processing techniques on the incoming image signal, they aim to enhance the quality level perceived by the viewer. Applying such techniques may cause side effects on different portions of the processed...

Comparing subjective image quality measurement methods for the creation of public databases

Influence of chroma variations on naturalness and image quality of stereoscopic images

The computational view on image quality of Janssen and Blommaert states that the quality of an image is determined by the degree to which the image is both useful (discriminability) and natural (identifiability). This theory is tested by creating two manipulations. Firstly, multiplication of the chroma values of each pixel with a constant in the...

Perception of detail in 3D images

A lot of current 3D displays suffer from the fact that their spatial resolution is lower compared to their 2D counterparts. One reason for this is that the multiple views needed to generate 3D are often spatially multiplexed. Besides this, imperfect separation of the left- and right-eye view leads to blurring or ghosting, and therefore to a...

Perceptually optimal boundaries for wide gamut TVs

Displays are coming on the market that can produce a larger range of colors over EBU and this has led to much research on the topic of how to use the additional color gamut volume provided by the displays. Some research has focused on different methods to map colors from small to large gamuts, whereas this paper focuses on defining the required...

Performance evaluation of 3D-TV systems

The image quality circle is a commonly accepted framework to model the relation between the technology variables of a display and the resulting image quality. 3D-TV systems, however, go beyond the concept of image quality. Research has shown that, although 3D scenes are clearly more appreciated by subjects, the concept ’image quality’ does not...

Visual discomfort in stereoscopic dsplays: A review

Visual discomfort has been the subject of considerable research in relation to stereoscopic and autostereoscopic displays, but remains an ambiguous concept used to denote a variety of subjective symptoms potentially related to different underlying processes. In this paper we clarify the importance of various causes and aspects of visual comfort....