A snake algorithm has been known that it has a strong point in extracting the exact contour of an object. But it is apt to be influenced by scattered edges around the control points. Since the shape of a moving object...A snake algorithm has been known that it has a strong point in extracting the exact contour of an object. But it is apt to be influenced by scattered edges around the control points. Since the shape of a moving object in 2D image changes a lot due to its rotation and translation in the 3D space, the conventional algorithm that takes into account slowly moving objects cannot provide an appropriate solution. To utilize the advantages of the snake algorithm while minimizing the drawbacks, this paper proposes the area variation based color snake algorithm for moving object tracking. The proposed algorithm includes a new energy term which is used for preserving the shape of an object between two consecutive images. The proposed one can also segment precisely interesting objects on complex image since it is based on color information. Experiment results show that the proposed algorithm is very effective in various environments.展开更多
The robot＇ s eyes through the background difference method were used to find broke into the visual range of a moving object and track and monitor the moving object. On the basis of geometry and according to the dista...The robot＇ s eyes through the background difference method were used to find broke into the visual range of a moving object and track and monitor the moving object. On the basis of geometry and according to the distance and deflection angle of the robot eyes positioning, the objects were captured and tracked by robots eyes. Geometry method precision was low, but simple calculation processing was quick. Thus, it can effectively meet the robot eyes preliminary positioning of the fast moving target.展开更多
MGAC (Motion Geometric Active Contours), a new variational framework of geometric active contours to track multiple nonrigid moving objects in the clutter background in image sequences is presented. This framework, in...MGAC (Motion Geometric Active Contours), a new variational framework of geometric active contours to track multiple nonrigid moving objects in the clutter background in image sequences is presented. This framework, incorporating with the motion edge information, consists of motion detection and tracking stages. At the motion detection stage, the motion edge map provides an approximate edge map of the moving objects. Then, a tracking stage, merely using the static edge information, is considered to improve the motion detection result. Force field regularization method is used to extend the capture range of the edge attraction force field in both stages. Experiments demonstrate that the proposed framework is valid for tracking multiple nonrigid objects in the clutter background.展开更多
Background difference method[l] is one of the effective paths of improving robot＇ s vision reaction ability, and robots use background difference method to find the moving object in vision range and conduct tracking ...Background difference method[l] is one of the effective paths of improving robot＇ s vision reaction ability, and robots use background difference method to find the moving object in vision range and conduct tracking monitoring of moving objects. Then it uses support vector to conduct learning fitting of moving object, which can effectively predict the moving trend of moving object, and then it fabricates corresponding decision programs to conduct intercept capture of moving objects.展开更多
Monolayer culture of spontaneously contracting rat heart cells was obtained from newborn SD rats andseeded intO culture plates. 1OOTCID50 of coxsackie virus B3 (CVB3) (Nancy strain )was added as the infectedgroup. The...Monolayer culture of spontaneously contracting rat heart cells was obtained from newborn SD rats andseeded intO culture plates. 1OOTCID50 of coxsackie virus B3 (CVB3) (Nancy strain )was added as the infectedgroup. The dynamics of taurine transport across membrane of normal heart cells and changes after infectionwere examined by using radioactive isotope tracing techniques. The results demonstrated that: (1)two uptake systems of taurine with different affinities and capacities were present in the Plasma membrane of cul-tured rat cardiOmyocytes,the K. of high and low affinity were 9. 5 X 10-5mol/l, and l. 3 X 1 O 2 mol/l,,respectively; (2)taurine transport across membrane was sodium-dependent with a positive linear relationshipbetween amount of taurine influx and extracellular concentration of sOdium;in addition,it was alsO regulat-ed by osmOlarity; (3) fyalanine,a carboxylic analog of taurine,could inhibit the uptake of taurine in dosedependently; (4)taurine influx was decreased in cultured rat cardiomyocytes after infected with CVB3. (5)the lnhibition ratio of taurine transport was enhanced as the infected time prolonged. This experiment pro-vides a basis fOr further investigation of kinetic test of taurine transport and more study should be carriedout to learn the effect of taurine in viral myocarditis.展开更多
文摘A snake algorithm has been known that it has a strong point in extracting the exact contour of an object. But it is apt to be influenced by scattered edges around the control points. Since the shape of a moving object in 2D image changes a lot due to its rotation and translation in the 3D space, the conventional algorithm that takes into account slowly moving objects cannot provide an appropriate solution. To utilize the advantages of the snake algorithm while minimizing the drawbacks, this paper proposes the area variation based color snake algorithm for moving object tracking. The proposed algorithm includes a new energy term which is used for preserving the shape of an object between two consecutive images. The proposed one can also segment precisely interesting objects on complex image since it is based on color information. Experiment results show that the proposed algorithm is very effective in various environments.
文摘The robot＇ s eyes through the background difference method were used to find broke into the visual range of a moving object and track and monitor the moving object. On the basis of geometry and according to the distance and deflection angle of the robot eyes positioning, the objects were captured and tracked by robots eyes. Geometry method precision was low, but simple calculation processing was quick. Thus, it can effectively meet the robot eyes preliminary positioning of the fast moving target.
文摘MGAC (Motion Geometric Active Contours), a new variational framework of geometric active contours to track multiple nonrigid moving objects in the clutter background in image sequences is presented. This framework, incorporating with the motion edge information, consists of motion detection and tracking stages. At the motion detection stage, the motion edge map provides an approximate edge map of the moving objects. Then, a tracking stage, merely using the static edge information, is considered to improve the motion detection result. Force field regularization method is used to extend the capture range of the edge attraction force field in both stages. Experiments demonstrate that the proposed framework is valid for tracking multiple nonrigid objects in the clutter background.
文摘Background difference method[l] is one of the effective paths of improving robot＇ s vision reaction ability, and robots use background difference method to find the moving object in vision range and conduct tracking monitoring of moving objects. Then it uses support vector to conduct learning fitting of moving object, which can effectively predict the moving trend of moving object, and then it fabricates corresponding decision programs to conduct intercept capture of moving objects.
文摘Monolayer culture of spontaneously contracting rat heart cells was obtained from newborn SD rats andseeded intO culture plates. 1OOTCID50 of coxsackie virus B3 (CVB3) (Nancy strain )was added as the infectedgroup. The dynamics of taurine transport across membrane of normal heart cells and changes after infectionwere examined by using radioactive isotope tracing techniques. The results demonstrated that: (1)two uptake systems of taurine with different affinities and capacities were present in the Plasma membrane of cul-tured rat cardiOmyocytes,the K. of high and low affinity were 9. 5 X 10-5mol/l, and l. 3 X 1 O 2 mol/l,,respectively; (2)taurine transport across membrane was sodium-dependent with a positive linear relationshipbetween amount of taurine influx and extracellular concentration of sOdium;in addition,it was alsO regulat-ed by osmOlarity; (3) fyalanine,a carboxylic analog of taurine,could inhibit the uptake of taurine in dosedependently; (4)taurine influx was decreased in cultured rat cardiomyocytes after infected with CVB3. (5)the lnhibition ratio of taurine transport was enhanced as the infected time prolonged. This experiment pro-vides a basis fOr further investigation of kinetic test of taurine transport and more study should be carriedout to learn the effect of taurine in viral myocarditis.
