The article discusses the dating and history of origin of a painting by Flemish painter Rogier va... more The article discusses the dating and history of origin of a painting by Flemish painter Rogier van der Weyden titled "Crucifixion of Scheut" painted around the year 1450 in reference to modern sources historical sources form the 16th century. The author discusses the authentication of the painting, Roger's relationship with the Carthusians, and the recipients of the painting including several charterhouses. The author also analyzes the influence of the painting by van der Weyden on French and Dutch art of the 15th century. Other topics mentioned in this article include the depiction of Saint John in late medieval art, the use of the picture as civic representation of the city Brussels, Belgium, and the depiction of the Virgin Mary in Christian art.
Development of computing power and cheap video cameras enabled today's traffic management systems... more Development of computing power and cheap video cameras enabled today's traffic management systems to include more cameras and computer vision based applications for monitoring and control of road transportation systems. Combined with image processing algorithms cameras are used as sensors to measure road traffic parameters like flow volume, origin-destination matrices, classify vehicles, etc. In this paper we propose a system for measurement of road traffic parameters (basic motion model parameters and macro-scopic traffic parameters). The system is based on Local Binary Pattern image features classification with a cascade of Gentle Adaboost classifiers to determine vehicle existence and its location in an image. Additionally, vehicle tracking and counting in a road traffic video is performed by using Extended Kalman Filter and virtual markers. The newly proposed system is compared with a system based on background subtraction. Comparison is performed by means of evaluating execution time and accuracy.
The writer discusses mirrors as metaphors for painting in northern European paintings of the 15th... more The writer discusses mirrors as metaphors for painting in northern European paintings of the 15th and early 16th century. Six paintings by Netherlandish artists or artists reflecting strong Netherlandish influences, dating from between 1470 and 1520, show the Madonna being painted by St Luke. In each work, a mirror reflecting St Luke at work, serves as an example of the mirror-like power of painting to represent reality.
... the more equal they seem to be, and the farther away from you the more they seem to be so clo... more ... the more equal they seem to be, and the farther away from you the more they seem to be so close together that one is on top of the ... of cities [...] I recognized in many, but above all in you, Filippo, and in our great friend the sculptor Donatello and in the others, Nencio, Luca and ...
The article discusses the dating and history of origin of a painting by Flemish painter Rogier va... more The article discusses the dating and history of origin of a painting by Flemish painter Rogier van der Weyden titled "Crucifixion of Scheut" painted around the year 1450 in reference to modern sources historical sources form the 16th century. The author discusses the authentication of the painting, Roger's relationship with the Carthusians, and the recipients of the painting including several charterhouses. The author also analyzes the influence of the painting by van der Weyden on French and Dutch art of the 15th century. Other topics mentioned in this article include the depiction of Saint John in late medieval art, the use of the picture as civic representation of the city Brussels, Belgium, and the depiction of the Virgin Mary in Christian art.
Development of computing power and cheap video cameras enabled today's traffic management systems... more Development of computing power and cheap video cameras enabled today's traffic management systems to include more cameras and computer vision based applications for monitoring and control of road transportation systems. Combined with image processing algorithms cameras are used as sensors to measure road traffic parameters like flow volume, origin-destination matrices, classify vehicles, etc. In this paper we propose a system for measurement of road traffic parameters (basic motion model parameters and macro-scopic traffic parameters). The system is based on Local Binary Pattern image features classification with a cascade of Gentle Adaboost classifiers to determine vehicle existence and its location in an image. Additionally, vehicle tracking and counting in a road traffic video is performed by using Extended Kalman Filter and virtual markers. The newly proposed system is compared with a system based on background subtraction. Comparison is performed by means of evaluating execution time and accuracy.
The writer discusses mirrors as metaphors for painting in northern European paintings of the 15th... more The writer discusses mirrors as metaphors for painting in northern European paintings of the 15th and early 16th century. Six paintings by Netherlandish artists or artists reflecting strong Netherlandish influences, dating from between 1470 and 1520, show the Madonna being painted by St Luke. In each work, a mirror reflecting St Luke at work, serves as an example of the mirror-like power of painting to represent reality.
... the more equal they seem to be, and the farther away from you the more they seem to be so clo... more ... the more equal they seem to be, and the farther away from you the more they seem to be so close together that one is on top of the ... of cities [...] I recognized in many, but above all in you, Filippo, and in our great friend the sculptor Donatello and in the others, Nencio, Luca and ...
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Papers by Yvonne Yiu