Ever wonder how blurry surveillance video images can be admissible as evidence in court? Software tools like Sarnoff Corp.'s VideoDetective mine the hidden data in such images to reconstruct their details clearly in still shots. But such tools are affordable only by large corporations and government agencies. Now a service called Sarensix permits private contractors to "farm out" the forensic evidence they gather from surveillance videos. The service was created by Sarnoff (Princeton, N.J.), a government contractor that fabricates custom ICs and ultrasmall video systems and software. Using data fused from video, infrared and other sensors, Sarnoff's security systems guard government installations and assist troops in the field. VideoDetective reconstructs video into stills that gather information from many frames, thereby creating sharp, telling still images from indistinct video. Smaller customers can use Sarensix to get their surveillance videos processed in VideoDetective by a Sarnoff-trained professional.