Surveillance system
First Claim
1. An adaptive learn mode method applied to the digital, time tagged, video data of a traffic surveillance system which eliminates or minimizes the need for operator intervention during setup or use of the surveillance system and the surveillance system'"'"'s data processing, wherein the adaptive learn mode method comprises a set of steps to establish and update functions that scale and align a coordinate system defined in object space to that of the coordinate system defined in surveillance camera'"'"'s pixel space, or image plane, so that a-priori limits, boundaries, images and criteria established in object space may be applied to the acquired data in pixel space, wherein the said adaptive learn mode method comprises:
- a. executing one set of steps if installation site-specific data files are present;
b. executing a different set of steps if installation site-specific data files are not present and the data processing determines that the parallelism of object motion, or traffic lanes, are within a specified limit, i.e., the slopes of all best fit matrix equations are within the equivalent of some angle implying that an intersection is not present; and
c. executing a different set of steps if installation site-specific data files are not present and the data processing determines that the parallelism of object motion, or traffic lanes, exceeds a specified limit, i.e., the slopes of all best fit matrix equations equals or exceeds the equivalent of some angle implying that a standard intersection is present.
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Accused Products
Abstract
A Single optical element that also provides the structural support between optical elements, the alignment stability between optical elements, the weatherized window (environmental enclosure), and minimizes, or eliminates, central obscuration for a distortion free, wide field of view (a panoramic ±80°) optical surveillance system is disclosed. Simultaneously, the logic for a learn mode eliminates the need for programming "the location of detection zones" in the data processing system e.g. for a traffic surveillance and control systems, during or after installation of the system or for the off-line data processing. The synergism of these features enables complete real-time, e.g. within seconds after learn mode adaptation, traffic analysis and reporting of an entire multi-lane, omni-directional, non-orthogonal, traffic intersection, traffic circle or roadway from a single video surveillance system with no or minimal, programming knowledge on the part of the system installer or operator.
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Citations
9 Claims
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1. An adaptive learn mode method applied to the digital, time tagged, video data of a traffic surveillance system which eliminates or minimizes the need for operator intervention during setup or use of the surveillance system and the surveillance system'"'"'s data processing, wherein the adaptive learn mode method comprises a set of steps to establish and update functions that scale and align a coordinate system defined in object space to that of the coordinate system defined in surveillance camera'"'"'s pixel space, or image plane, so that a-priori limits, boundaries, images and criteria established in object space may be applied to the acquired data in pixel space, wherein the said adaptive learn mode method comprises:
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a. executing one set of steps if installation site-specific data files are present; b. executing a different set of steps if installation site-specific data files are not present and the data processing determines that the parallelism of object motion, or traffic lanes, are within a specified limit, i.e., the slopes of all best fit matrix equations are within the equivalent of some angle implying that an intersection is not present; and c. executing a different set of steps if installation site-specific data files are not present and the data processing determines that the parallelism of object motion, or traffic lanes, exceeds a specified limit, i.e., the slopes of all best fit matrix equations equals or exceeds the equivalent of some angle implying that a standard intersection is present. - View Dependent Claims (2, 3, 4, 5)
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- 6. A refractive optical element of a catadioptric optical system comprising at least one refractive optical element and at least one mirror, wherein the said refractive optical element provides the structural support and alignment stability between other optical elements and a mirror, and also provides the protective environmental enclosure of the optical elements and the mirror, and introduces no obscuration and/or vignetting of images for the field of view about the optical axis, and where one surface of the refractive optical element is the last surface, excluding films and coating surfaces, of the optical system, and where the said refractive optical element has the form where the radial distances from the optical axis to the inner and outer surfaces are symmetrical about the optical axis and varies as function of axial position to form a walled cylinder or the partial shell of a truncated cone, sphere, or asphere.
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8. A solid, three optical surface, catadioptric element of an optical system, wherein the said catadioptric element provides the structural support and alignment stability between other optical elements and a mirror of the said optical system, and also provides the protective environmental enclosure of the optical elements and the mirror, and introduces no obscuration and/or vignetting of images for the field of view about the optical axis and where one surface of said catadioptric element is the last surface, excluding films and coating surfaces, of the optical system, and where the said catadioptric element'"'"'s three effective surfaces listed sequentially from the focal plane side, comprise:
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a. a first surface, normal to and symmetric about the optical axis, primarily optimized for aberration correction, focus control and secondarily for field angle magnification between image and object space; b. a second surface which is a mirror normal to and symmetric about the optical axis and optimized as the primary transfer function between radial distance in the focal plane and the object surface and with the mirror surface redirecting the rays between the first surface and a third surface in accordance with basic reflection equations where the reflected and incident angles are of equal magnitude relative to the instantaneous surface normal; and c. a third surface, which is part of the physical surface connecting the first and the second optical surfaces, which is nominally parallel with, and a radial function of, the axial distance along the optical axis and is optimized as the secondary transfer function between radial distance in the focal plane and the object surface, said third surface redirecting the rays between the second surface of the catadioptric element and the object surface in accordance with Snell'"'"'s basic refraction equation of n1 Sin θ
1 =n2 Sin θ
2, where n is the media'"'"'s index of refraction, θ
is the ray angle relative to the instantaneous surface normal and the subscripts 1 and 2 indicate the media of the ray, and the shape of this surface also provides modification for aberration correction and focus control.
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9. A solid, four optical surface, catadioptric element of an optical system, wherein the said catadioptric element provides the structural support and alignment stability between other optical elements and a mirror of the said optical system, and also provides the protective environmental enclosure for the optical elements and the mirror, and introduces no obscuration and/or vignetting of images for the field of view about the optical axis and where one surface of said catadioptric element is the last surface, excluding films and coating surfaces, of the optical system, and where the said catadioptric element'"'"'s four optical surfaces listed sequentially from the focal plane side, comprises:
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a. a first physical surface which is normal to and symmetric about the axis and has two optical surfaces herein identified as the first optical surface and third optical surface, where; i. the first optical surface is a transparent central core and may be the system'"'"'s aperture stop at or near the vertex of a third optical surface; ii. the third optical surface is a reflective aspheric surface, about the first surface, and is the second reflective element after the aperture stop, where this mirror is optimized as the primary transfer function between radial distance in the focal plane and the object surface, and this surface redirects the rays between the second optical surface, which is also a mirror, and a fourth optical surface in accordance with basic reflection equations where the reflected and incident angles are of equal magnitude relative to the instantaneous surface normal; b. a second optical surface which is a mirror that is normal to and symmetric about the axial axis, and may be flat or optimized as either, or both, a low power aspheric or an axicon, where its primary function is to redirect the rays of the first optical surface to the third optical surface in accordance with basic reflection equations where the reflected and incident angles are of equal magnitude relative to the instantaneous surface normal; and c. a fourth optical surface, which is part of the physical surface connecting the second and the third optical surfaces, and which is nominally parallel with, and a radial function of, the axial distance along the optical axis and optimized as a transfer function between radial distance in the focal plane and the object surface by redirecting the rays between the catadioptric element'"'"'s third optical surface and the object'"'"'s surface in accordance with Snell'"'"'s basic refraction equation of n1 Sin θ
1 =n2 Sin θ
2, where n is the media'"'"'s index of refraction, θ
is the ray angle relative to the instantaneous surface normal and the subscripts 1 and 2 indicate the media of the ray, and the shape of this surface also provides modifications for aberration correction and focus control.
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Specification