Systems and methods for obtaining improved accuracy...

H - Electricity – 04 – N

Patent

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H04N 7/18 (2006.01) H04N 9/47 (2006.01)

Patent

CA 2644006

Reference markers (130 and 140 of fig. 1) are attached to rails (112 of fig. 1) and/or other dynamically moving components of railroad tracks, and/or located at fixed and stationary positions adjacent to the track. When images of railway rolling stock are obtained, the reference marker(s) appear in the image Accordingly, measurements of various aspects and parameters of various components of the railway rolling stock can be obtained at high precision and/or accuracy relative to the railroad track component to which the reference marker is attached and/or relative to the stationary position. The reference markers (130 and 140 of fig. 1) allow one or more images, obtained at some intervening time interval, to be accurately and precisely aligned relative to the reference marker(s) regardless of the dynamic motion of the railroad track component(s) (100 of fig. 1) and/or of the rolling stock that occurred as the images were captured. The reference markers can include optical, thermal or other indicia The indicia have known dimensions and/or known distances from an image capture device (120 of fig. 1 ).

L'invention concerne des marqueurs de référence fixés sur des rails et/ou d'autres pièces dynamiquement mobiles de voies ferroviaires, et/ou se trouvant en des positions fixes et stationnaires adjacentes à la voie. Quand des images de matériel roulant ferroviaire sont obtenues, les marqueurs de référence figurent sur l'image. Par conséquent, des mesures de différents aspects et paramètres de différentes pièces du matériel roulant ferroviaire peuvent être obtenues avec haute précision et/ou exactitude par rapport à la pièce de la voie ferroviaire sur laquelle le marqueur de référence est fixé et/ou par rapport à la position stationnaire. Les marqueurs de référence permettent d'aligner une ou plusieurs images, obtenues selon un intervalle de temps intermédiaire, de manière exacte et précise par rapport aux marqueurs de référence quel que soit le mouvement dynamique des pièces de la voie ferroviaire et/ou du matériel roulant au moment de la capture des images. Les marqueurs de référence peuvent comprendre des indices optiques, thermiques ou autres. Les indices ont des dimensions connues et/ou sont à des distances connues par rapport à un dispositif de capture d'images.

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