System and method to detect a transition in an image stream
First Claim
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1. A method for segmenting an image stream captured within a gastrointestinal tract by an in vivo device inserted into said gastrointestinal tract, said device comprising an imager and being designed to pass through said gastrointestinal tract and to capture a stream of images thereof, the method comprising:
- receiving a first image and a second image of the image stream captured using said imager during a single pass of the device through the gastrointestinal tract, wherein the first image and the second image correspond to first and second chronological points in a time scale of the image stream, respectively;
computing, using a computer, average pixel color values of the first image and of the second image;
computing average tissue color based on RGB images with a predetermined number of pixels that pass at least one condition selected from;
pixel ratio of red pixels to green pixels which passes a predetermined threshold, and pixel ratio of green pixels to blue pixels which passes a predetermined threshold;
detecting, using a computer, a transition between organs of the gastrointestinal tract based on a change in the average pixel color values; and
segmenting the image stream at the points in the time scale of the image stream that correspond to transitions between the organs of the gastrointestinal tract.
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Abstract
A system and method may detect a transition in an image stream captured within a body lumen. One or more parameters may be computed at points corresponding to a time scale of the image stream. Transition in the values of the parameters may be identified and may indicate a location along the body lumen. The image stream may be segmented at the transition points identified.
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Citations
19 Claims
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1. A method for segmenting an image stream captured within a gastrointestinal tract by an in vivo device inserted into said gastrointestinal tract, said device comprising an imager and being designed to pass through said gastrointestinal tract and to capture a stream of images thereof, the method comprising:
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receiving a first image and a second image of the image stream captured using said imager during a single pass of the device through the gastrointestinal tract, wherein the first image and the second image correspond to first and second chronological points in a time scale of the image stream, respectively; computing, using a computer, average pixel color values of the first image and of the second image; computing average tissue color based on RGB images with a predetermined number of pixels that pass at least one condition selected from;
pixel ratio of red pixels to green pixels which passes a predetermined threshold, and pixel ratio of green pixels to blue pixels which passes a predetermined threshold;detecting, using a computer, a transition between organs of the gastrointestinal tract based on a change in the average pixel color values; and segmenting the image stream at the points in the time scale of the image stream that correspond to transitions between the organs of the gastrointestinal tract. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for segmenting an image stream captured within a gastrointestinal tract comprising:
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an in vivo device comprising an imager to capture the image stream from within the gastrointestinal tract during a single pass of said device through the gastrointestinal tract, wherein the image stream comprises a first image and a second image that correspond to first and second chronological points in a time scale of the image stream, respectively; a parameter computing unit to compute average pixel color values of the first image and the second image and to compute average tissue color based on RGB images with a predetermined number of pixels that pass at least one condition selected from;
pixel ratio of red pixels to green pixels which passes a predetermined threshold, and pixel ratio of green pixels to blue pixels which passes a predetermined threshold;a transition detecting unit to detect a transition between organs of the gastrointestinal tract by identifying a change in the average pixel color values between the first image and the second image; and a segmentation unit to segment the image stream at the points in the time scale of the image stream that correspond to transitions between organs of the gastrointestinal tract. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification