In this work we address the problem of capturing human body motion under changing lighting conditions in a multiview setup. In order to account for changing lighting conditions we propose to use an intermediate image representation that is invariant to the scene lighting. In our approach this is achieved by solving time-varying segmentation problems that use frameand view-dependent appearance c...

In this work, we present a technique for capturing a time-varying human performance in such a way that it can be re-illuminated in postproduction. The key idea is to illuminate the subject with a variety of rapidly changing time-multiplexed basis lighting conditions, and to record these lighting conditions with a fast enough video camera so that several or many different basis lighting conditio...

Light conditions are known to affect the number of vehicle accidents and fatalities but the relationship between light conditions and vehicle speed is not fully understood. This study examined whether vehicle speed on roads is higher in daylight and under road lighting than in darkness, and determined the combined effects of light conditions, posted speed limit and weather conditions on driving...

BACKGROUND Vision and hearing impairments in the elderly (aged over 80 years) and poor indoor lighting conditions in a home-care setting are risk factors for functional decline, reduced social participation, withdrawal, and accidents. OBJECTIVE We aimed to evaluate the changes in vision, hearing, and lighting conditions in the homes of participants aged over 80 years after implementation of a...

Skin color is a useful means for human face detection. In this paper, we propose an efficient color compensation method for skin color segmentation under varying lighting conditions. One of the major problems of using skin color is that a face region may not be detected under poor or uneven lighting conditions. Our approach considers the distribution of the color components of skin pixels and t...

With the rapid technological advancement in vision systems, the advantages of vision based system as the sensing device have influenced the quality of the Robot Soccer game. This study presents an approach to produce a balanced image in terms of brightness under un-uniform lighting environment through the control of lens iris opening. Existing image processing module and CCD camera were used to...

Face detection is an important preprocessing stage for automated facial recognition systems. Imaging in real world environment experience substantial variation in lighting and weather conditions. Surveillance systems are a typical example of real world imaging systems. Face detection is based upon typical haar like patterns appearing in facial images. Performance of even most successful face de...

Face recognition in photographic positive and negative was examined in a same/different matching task in five lighting direction conditions using untextured 3-D laser-scanned faces. The lighting directions were +60, +30, 0, -30 and -60 degrees, where negative values represent bottom lighting and positive values represent top lighting. Recognition performance was better for faces in positive tha...

Research on eliminating organic pollutants in water by using heterogeneous photocatalysts such as nano-TiO2 abound. However, the question is whether metabolites, resulting from optical dispersion of environmental pollutants, are still toxic to aquatic organisms. Therefore, this study was designed to evaluate the effect of a co-exposure to paraquat and TiO2-NPs on blood biochemical indices of co...