Electro-optical step-frame camera system with image motion...

G - Physics – 01 – C

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G01C 11/02 (2006.01) G02B 27/64 (2006.01) H04N 5/225 (2006.01) H04N 5/232 (2006.01) H04N 7/18 (2006.01) H04N 13/00 (2006.01) H04N 3/15 (2006.01) H04N 5/335 (2006.01)

Patent

CA 2219813

An electro-optical step-frame camera system in which succesive overlapping frames of scene imagery are generated by an electro-optical imaging array, and in which electronic image motion compensation is performed by the array during the generation of at least some of the frames of imagery (100). The succesive frames of imagery are made in a stepping pattern that is repeated in a series of cycles of steps, each step separated by a framing interval in which a frame of imagery is obtained (142). The stepping cycles of the camera generate sweeping coverage of the terrain of interest. As the velocity of height to ratio of the reconnaissance aircraft changes, the stepping cycle and electronic image motion compensation are continually adjusted, so as to ensure maximum scene coverage and preservation of image resolution (24).

Système électro-optique de photographie image par image à compensation de filage dans lequel une mosaïque électro-optique génère des images consécutives, qui se chevauchent, correspondant à l'imagerie d'une scène et réalise la compensation électronique de filage durant la génération d'au minimun quelques images (100). Les images consécutives sont prises selon le schéma d'échelonnement répété en une série de cycles d'échelonnement, chaque échelon étant séparé du suivant par un intervalle de cadrage durant lequel une image est prise (142). Les cycles d'échelonnement de l'appareil génèrent un balayage du terrain observé. La vitesse changeant en fonction de l'altitude de l'avion de reconnaissance, le cycle d'échelonnement et la compensation électronique de filage sont réglés en continu, de façon à assurer le maximum de couverture de la scène et la conservation de la résolution de l'image (24).

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