Image processing method
DC CAFC
First Claim
1. A process of tracking a target in an input signal implemented using a system comprising an image processing system, the input signal comprising a succession of frames, each frame comprising a succession of pixels, the target comprising pixels in one or more of a plurality of classes in one or more of a plurality of domains, the process performed by said system comprising, on a frame-by-frame basis:
- forming at least one histogram of the pixels in the one or more of a plurality of classes in the one or more of a plurality of domains, said at least one histogram referring to classes defining said target; and
identifying the target in said at least one histogram itself,wherein forming the at least one histogram further comprises determining X minima and maxima and Y minima and maxima of boundaries of the target.
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Abstract
A method and apparatus for localizing an area in relative movement and for determining the speed and direction thereof in real time is disclosed. Each pixel of an image is smoothed using its own time constant. A binary value corresponding to the existence of a significant variation in the amplitude of the smoothed pixel from the prior frame, and the amplitude of the variation, are determined, and the time constant for the pixel is updated. For each particular pixel, two matrices are formed that include a subset of the pixels spatially related to the particular pixel. The first matrix contains the binary values of the subset of pixels. The second matrix contains the amplitude of the variation of the subset of pixels. In the first matrix, it is determined whether the pixels along an oriented direction relative to the particular pixel have binary values representative of significant variation, and, for such pixels, it is determined in the second matrix whether the amplitude of these pixels varies in a known manner indicating movement in the oriented direction. In each of several domains, histogram of the values in the first and second matrices falling in such domain is formed. Using the histograms, it is determined whether there is an area having the characteristics of the particular domain. The domains include luminance, hue, saturation, speed (V), oriented direction (D1), time constant (CO), first axis (x(m)), and second axis (y(m)).
50 Citations
6 Claims
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1. A process of tracking a target in an input signal implemented using a system comprising an image processing system, the input signal comprising a succession of frames, each frame comprising a succession of pixels, the target comprising pixels in one or more of a plurality of classes in one or more of a plurality of domains, the process performed by said system comprising, on a frame-by-frame basis:
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forming at least one histogram of the pixels in the one or more of a plurality of classes in the one or more of a plurality of domains, said at least one histogram referring to classes defining said target; and identifying the target in said at least one histogram itself, wherein forming the at least one histogram further comprises determining X minima and maxima and Y minima and maxima of boundaries of the target. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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- Resources
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Current AssigneeImage Processing Technologies, LLC (General Patent Corporation), Southern District of Florida
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Original AssigneeImage Processing Technologies, LLC (General Patent Corporation)
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InventorsPirim, Patrick
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Primary Examiner(s)Seth, Manav
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Application NumberUS14/215,358Publication NumberTime in Patent Office365 DaysField of SearchUS Class Current382/103CPC Class CodesG06T 2207/10016 Video; Image sequenceG06T 2207/20104 Interactive definition of r...G06T 2207/30241 TrajectoryG06T 5/70 Denoising; SmoothingG06T 7/10 Segmentation; Edge detectio...G06T 7/20 Analysis of motion motion e...G06T 7/246 using feature-based methods...G06T 7/70 Determining position or ori...G06T 7/73 using feature-based methodsG06V 10/255 Detecting or recognising po...G06V 10/50 by performing operations wi...G06V 20/52 Surveillance or monitoring ...H04N 23/69 Control of means for changi...
