Abstract: A system for estimating daytime visibility conditions includes a camera configured to capture a video sequence over a period time, an odometry sensor configured to monitor motion of the camera, and a video processing unit in communication with the camera and with the odometry sensor. The video processing unit is configured to receive the video sequence from the camera, detect an object within the video sequence, estimate a distance between the camera and the object for each frame of the video sequence, determine a mean perceived brightness of the object for each image frame, and estimate an ambient visibility using the estimated distance and mean perceived brightness of the object.

Abstract: Methods and apparatus for displaying a near-focus one-dimensional marker on a head up display (HUD) such that the parallax disparity between the marker and a distant far-focus visual target is not apparent to a viewer looking at the visual target through the HUD. The one-dimensional marker is oriented at the same angle as the interocular line of the viewer's eyes, as captured by a digital camera facing the viewer. Additionally, a dashed one-dimensional marker is disclosed to reduce the visual noticeability of small inaccuracies in orientation.

Abstract: Methods and apparatus for displaying a near-focus one-dimensional marker on a head up display (HUD) such that the parallax disparity between the marker and a distant far-focus visual target is not apparent to a viewer looking at the visual target through the HUD. The one-dimensional marker is oriented at the same angle as the interocular line of the viewer's eyes, as captured by a digital camera facing the viewer. Additionally, a dashed one-dimensional marker is disclosed to reduce the visual noticeability of small inaccuracies in orientation.

Abstract: A system for estimating daytime visibility conditions includes a camera configured to capture a video sequence over a period time, an odometry sensor configured to monitor motion of the camera, and a video processing unit in communication with the camera and with the odometry sensor. The video processing unit is configured to receive the video sequence from the camera, detect an object within the video sequence, estimate a distance between the camera and the object for each frame of the video sequence, determine a mean perceived brightness of the object for each image frame, and estimate an ambient visibility using the estimated distance and mean perceived brightness of the object.

Abstract: A code pattern detector including at least one pattern definition expressed in a pattern language, and a code analyzer operative to employ the pattern definition to analyze a code base, the code analyzer including a representation builder operative to construct a representation of the code base, a pattern detector operative to process the representation in conjunction with the pattern definition to find a pattern within the representation, and an inference engine operative to express any of the found patterns as an abstract relationship within the code base.