This paper describes a flexible experimental teleteaching system,which is established by integrating an additional document camerawith desktop H.320 system to present high resolution document imageto remote student si...This paper describes a flexible experimental teleteaching system,which is established by integrating an additional document camerawith desktop H.320 system to present high resolution document imageto remote student site. Special software architechture has beendesigned to manage the document image processing part, as well as thecommunication with the videoconferencing part. Based on the idea ofContent-based representation, the document im- age and video imageare synthesized into a single display, which is composed of two VideoObject Planes(VOP)with different resolutions. Automatic changedetection is used for document image processing, which makesefficient use of the transmission channel. Experimental resultsdemonstrate the performance of the system.展开更多
Weld seam inflection points are inevitable in tele-teaching process on many welding occasions. The inflection points identified accurately is one of the prerequisites of ensuring tele-teaching precision. On the basis ...Weld seam inflection points are inevitable in tele-teaching process on many welding occasions. The inflection points identified accurately is one of the prerequisites of ensuring tele-teaching precision. On the basis of the inflection point characters, the concept of inflection point direction coefficient is proposed, the human-simulation intelligent control model of inflection point is established. The algorithms above, the inflection point identifying of box workpiece can be well performed. The experimental results show that the identifying average error of inflection point can be reduced to less than O. 5 mm by using optimal treatment of robot off-line programming system. The identifying control can automatically identify weld seam inflection points which can meet tele-teaching requirements.展开更多
文摘This paper describes a flexible experimental teleteaching system,which is established by integrating an additional document camerawith desktop H.320 system to present high resolution document imageto remote student site. Special software architechture has beendesigned to manage the document image processing part, as well as thecommunication with the videoconferencing part. Based on the idea ofContent-based representation, the document im- age and video imageare synthesized into a single display, which is composed of two VideoObject Planes(VOP)with different resolutions. Automatic changedetection is used for document image processing, which makesefficient use of the transmission channel. Experimental resultsdemonstrate the performance of the system.
文摘Weld seam inflection points are inevitable in tele-teaching process on many welding occasions. The inflection points identified accurately is one of the prerequisites of ensuring tele-teaching precision. On the basis of the inflection point characters, the concept of inflection point direction coefficient is proposed, the human-simulation intelligent control model of inflection point is established. The algorithms above, the inflection point identifying of box workpiece can be well performed. The experimental results show that the identifying average error of inflection point can be reduced to less than O. 5 mm by using optimal treatment of robot off-line programming system. The identifying control can automatically identify weld seam inflection points which can meet tele-teaching requirements.
