Abstract:
The present invention relates to a system and method of detecting polarized identification indicia in real-time. A frame of image data is provided (110) having a plurality of pixels, wherein each pixel includes polarized light intensity information. An intensity value is determined for each of the pixels from the polarized light intensity information (120). A first portion of the pixels having intensity values within an intensity range is selected (130, 140). The pixels in the first portion having similar angle of linear polarization values within a tolerance range are analyzed (180), thereby detecting the polarized identification indicia in the image data (190).
Abstract:
A control system for use with one or more video surveillance cameras forming a video surveillance system. The control system includes a video database module wherein a database entry includes at least one sensor condition defining an alarm state for each camera. Additionally, there is an alarm condition module that receives one or more sensor signals from one or more sensors associated with a camera and retrieves the sensor condition defining an alarm state for the camera. The alarm condition module outputs an alarm signal if the alarm condition module determines that the one or more sensor signals meets the one or more sensor conditions. The control system is modular and may be distributed in a network environment. The control system also monitors the network bandwidth and can adjust the throughput of digital data representing the digital images in order to avoid any bandwidth limitations.
Abstract:
A method of preparing a composite image from images of a video data stream and for identifying changed features in two composite images. Frames from the video data stream are transformed to a projected ZD image, aligned with adjacent frames and overlapping areas are averaged to provide a higher apparent resolution. A composite image is formed from non-overlapping portions of the images and the averaged overlapping portions of the images. The composite image can be stored in real-time. As a second composite image is prepared of the same location at a later time, portions of the second image can be compared to corresponding portions of the stored image after the intensities of the images are equalized. Image areas whose absolute difference exceeds a threshold are again intensity equalized. Areas that are again above threshold can be flagged for further scrutiny, either by a human or by a machine that performs object recognition. In this way, composite video images of a scene can be prepared and compared in real-time.
Abstract:
Forming a single image from multiple images is described. A first image and a second image partially overlap to define a common overlap region, and each image has multiple pixels. A boundary between the first image and the second image is automatically calculated based on processed pixel values in the common overlap region. Then the first and second image may be integrated along the boundary to form a single image.
Abstract:
A method for generating a composite image includes receiving a separate image into a computer system, comparing the separate image to the composite image so as to generate a mismatch value, and modifying at least one of the composite image and the separate image to reduce the mismatch value. The method is used for identfication of persons in police investigation.
Abstract:
The invention relates to image stabilization of recorded material. The recorded material is image stabilized in order to ascertain more information about an object moving in the image. The method begins by obtaining a first digital video image and a second digital video image. A subsection of the second image is selected which has the same addressable location as the subsection from the first image. The subsection of the second image is shifted in a predetermined direction. After the region is shifted, an error value is calculated based upon a comparison of the subsection of the first image and the shifted subsection of the second image. If the error is below a predetermined threshold, the digital data of the second image is readressed such that the data of the newly defined subsection would overlay the subsection from the first image.
Abstract:
A method for positioning a cursor relative to a reference position on the display using the pointing device includes the steps of positioning the cursor at a position on a display with a pointing device, selecting the position as the reference position, the reference position associated with an object, moving the cursor to a plurality of cursor positions not associated with the object on the display with the pointing device, and displaying a plurality of offset values on the display, the offset values being calculated in response to the reference position and the plurality of cursor positions.