Enhanced visualization techniques using reconstructed time waveforms
AssigneeRdi Technologies, Inc.
InventorsJeffrey R. Hay, Mark William Slemp, Kenneth Ralph Piety
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Abstract
A source video of a scene showing moving objects, undergoing periodic motion in a field of view which may be located in a region of interest, is filtered and processed by constructing a representation such as a frequency spectrum plot of some of the frequencies of motion in the scene or region of interest and enabling a selection of frequency peaks representing one or more pixels in the field of view from which to generate reconstructed waveforms, then applying the reconstructed waveform at each pixel to a reference frame to produce a modified video recording.
Claims12
A system for evaluating a collection of moving objects undergoing periodic motion using at least one video acquisition device that acquires samples in the form of sampling data as a plurality of video images of a field of view of the moving objects, wherein the video images are divisible into individual video image frames, with each frame being divisible into a plurality of pixels, comprising:
- a video acquisition device to obtain a source video of the moving objects, wherein video images are acquired at a sampling rate that is sufficient to capture periodic motion at a plurality of frequencies occurring in one or more of the moving objects;
- a processor and a memory for storage of the source video including individual video frames;
- and
- a computer program operating in said processor to:
- construct at least one of a frequency spectrum plot or table of at least a subset of the plurality of frequencies of periodic motion in the source video or a composite frequency spectrum plot or table of the plurality of frequencies at a selected location in the source video;
- produce a reconstructed waveform using a time domain fabrication method for one or more pixels in a subset of pixels in the field of view or a region of the field of view, and
- apply the reconstructed waveform for the subset of pixels or region to a reference frame to produce a modified video recording.
A system for evaluating a collection of moving objects undergoing periodic motion using at least one video acquisition device that acquires samples in the form of sampling data as a plurality of video images of a field of view of the moving objects, wherein the video images are divisible into individual video image frames, with each frame being divisible into a plurality of pixels, comprising:
- a video acquisition device to obtain a source video of the moving objects, wherein video images are acquired at a sampling rate that is sufficient to capture periodic motion at a plurality of frequencies occurring in one or more of the moving objects;
- a processor and a memory for storage of the source video including individual video frames;
- and
- a computer program operating in said processor to:
- construct at least one of a frequency spectrum plot or table of at least a subset of the plurality of frequencies of periodic motion in the source video or a composite frequency spectrum plot or table of the plurality of frequencies at a selected location in the source video;
- locate a maximum peak and the largest N peaks in the frequency spectrum and discard one or more peaks that are a factor of K less than the maximum peak, resulting in a set of M remaining peaks;
- produce a reconstructed waveform using a time domain fabrication method for one or more pixels in a subset of pixels in the field of view or region of the field of view where periodic motion is associated with one of the M remaining peaks;
- and
- apply the reconstructed waveform for the subset of pixels or region to a reference frame to produce a modified video recording.
Dependencies are inferred from the claim text.