Patent ID: 7388603
Filing Date: 2008-06-17
Classification: H04N

Abstract:
1. An airborne target identification system comprising: a frame processing system to receive input frames from an input device and generate output frames for an output device; and a target size discriminator to determine a size of a target within the input frames and to change a threshold for pixels that comprise the target based on the size of the target and to adjust an integration factor used by a selected integration process for integrating pixels that comprise the target based on the size and motion of the target, wherein the frame processing system comprises: a pixel motion comparison element to compare a pixel of a current input frame and a corresponding pixel from a frame memory; an integrator to perform the selected integration process on the pixel of the current input frame; and an integrator source selection element responsive to a control signal from the pixel motion comparison element to provide the pixel from the current frame to the integrator instead of the pixel from the frame memory when a difference between the pixel of the current input frame and a corresponding pixel from the frame memory exceeds the threshold, wherein when the difference does not exceed the threshold, the integrator performs the selected integration process using the pixel from the current input frame and the corresponding the pixel from the frame memory to generate an output frame, wherein when the difference exceeds the threshold, the integrator performs the selected integration process using the pixel from the current input frame in place of the pixel from the frame memory to generate the output frame, and wherein the changing of the threshold and the adjustment of the integration factor by the target size discriminator enhances the target's hang time on the output device for improved target identification and detection.