초록 ▼

An optical flow detection system is employed in conjunction with a target cuer system, which includes a sensor carried on a platform, for the purpose of either removing undesirable sensor motion or for the purpose of removing undesirable background motion so that targets may be more easily identifie

An optical flow detection system is employed in conjunction with a target cuer system, which includes a sensor carried on a platform, for the purpose of either removing undesirable sensor motion or for the purpose of removing undesirable background motion so that targets may be more easily identified. The optical flow detection system includes an optical flow estimator which receives a plurality of pixels and generates therefrom an instantaneous pixel velocity value and a predicted pixel velocity value. The instantaneous pixel velocity values and predicted pixel velocity values are then manipulated to remove undesirable features included in the image sequence generated by the sensor. Methods for operating the optical flow detection system are also provided.

대표청구항 ▼

An optical flow detection system for receiving a plurality of pixels so as to derive an instantaneous pixel velocity value and a predicted pixel velocity value for each pixel, comprising: sensor means for supplying an imaging sequence which includes potential targets represented by at least one pixe

An optical flow detection system for receiving a plurality of pixels so as to derive an instantaneous pixel velocity value and a predicted pixel velocity value for each pixel, comprising: sensor means for supplying an imaging sequence which includes potential targets represented by at least one pixel; an image queue for storing said imaging sequence; gradient means for receiving and comparing said imaging sequence to said stored imaging sequence so as to generate a pixel intensity gradient value for each of said pixels; calculation means for receiving said pixel intensity gradient values and a predicted pixel velocity value so as to generate an instantaneous pixel velocity value for each pixel; and smoothing means for receiving said instantaneous pixel velocity values which are employed in a least squares fitting to generate coefficients which are used in a set of quadratic equations to generate said predicted pixel velocity values.