A laboratory study of sign legibility has shown that a contrast of between 30 and 50 percent is required to maintain 75th percentile legibility. Legibility distance increased gradually with greater contrast to about 80 percent; above a luminance ratio of 5 to 1, legibility did not increase greatly. As ambient levels increased, legibility distance increased linearly with the logarithm of either ...

The timely provision of traffic sign information to drivers is essential for the drivers to respond, to ensure safe driving, and to avoid traffic accidents in a timely manner. We proposed a timely visual recognizability quantitative evaluation method for traffic signs in large-scale transportation environments. To achieve this goal, we first address the concept of a visibility field to reflect ...

The disadvantages for meaning filter and Kalman filter are that real-time culling and modified singular value can not be removed and achieved in WIFI indoor position. This paper proposes an improved dynamic RSSI signal processing method. In order to improve the accuracy of dynamic RSSI signal processing, this algorithm is based on average hop distance and improved method of generalized least sq...

Conservation of Neotropical game species must take into account the livelihood and food security needs of local human populations. Hunting management decisions should therefore rely on abundance and distribution data that are as representative as possible of true population sizes and dynamics. We simultaneously applied a commonly used encounter-based method and an infrequently used sign-based m...

We investigate a method for selecting recordings of human face and head movements from a sign language corpus to serve as a basis for generating animations of novel sentences of American Sign Language (ASL). Drawing from a collection of recordings that have been categorized into various types of non-manual expressions (NMEs), we define a method for selecting an exemplar recording of a given typ...

*Assistant Professor, **Professor, Department of Pulmonary Medicine, Medical College, Kolkata, West Bengal Received: 17.07.2012; Revised: 06.11.2012; Accepted; 09.01.2013 A fifty five year old male presented with episodes of scanty haemoptysis for two days, cough with expectoration for las t four years . Chest X – ray (CXR), posteroanterior view showed a homogeneous rounded opacity in left lowe...

The purpose of this study was to quantify real-world highway sign reading behavior while driving at night. Sign reading behavior was assessed using traditional self-report augmented by an in-vehicle eye tracking system. Good agreement was found between eye movement data (last-look distance) and verbal report measures of sign legibility distance (r = 0.9). Significant reductions in legibility di...

We first introduce matrix concepts in linear programming by developing a variation of the simplex method called the revised simplex method. This algorithm, which has become the basis of all commercial computer codes for linear programming, simply recognizes that much of the information calculated by the simplex method at each iteration, as described in Chapter 2, is not needed. Thus, efficienci...