Video image segmentation
First Claim
Patent Images
1. An apparatus comprising:
- an image input unit configured to receive as input a video image having a first image frame and a second image frame, the second image frame being consecutive to the first image frame; and
an image processing unit configured to segment the second image frame based at least in part on information on the first image frame,wherein the image processing unit comprises a foreground segmentation unit configured to segment the first image frame to determine a boundary between a foreground and a background of the first image frame, an attenuation vector generating unit configured to generate an attenuation vector from the segmented first image frame, and a contrast attenuating unit configured to attenuate a contrast of the second image frame by using the attenuation vector, andthe attenuation vector generating unit is configured to generate the attenuation vector based on a difference between the contrast for a pixel in the second image frame and the contrast for a pixel of the boundary of the first image frame,the attenuation vector generating unit is configured to measure a difference between a contrast at a pixel of the second image frame and a contrast at a certain point of the boundary of the first image frame to generate a component of the attenuation vector, andthe attenuation vector generating unit is configured to measure distances between the pixel of the second image frame and two different points of the boundary, and generates the component of the attenuation vector according to the distances and the inner product of components of the contrast at the pixel of the second image frame.
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Abstract
Techniques for segmenting an image of an object are provided. In some embodiments, an image segmentation apparatus includes an image input unit and an image processing unit. The image input unit is configured to receive as input a video image having a first image frame and a second image frame that is consecutive to the first image frame. The image processing unit is configured to segment the second image frame based at least in part on information on the first image frame.
10 Citations
15 Claims
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1. An apparatus comprising:
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an image input unit configured to receive as input a video image having a first image frame and a second image frame, the second image frame being consecutive to the first image frame; and an image processing unit configured to segment the second image frame based at least in part on information on the first image frame, wherein the image processing unit comprises a foreground segmentation unit configured to segment the first image frame to determine a boundary between a foreground and a background of the first image frame, an attenuation vector generating unit configured to generate an attenuation vector from the segmented first image frame, and a contrast attenuating unit configured to attenuate a contrast of the second image frame by using the attenuation vector, and the attenuation vector generating unit is configured to generate the attenuation vector based on a difference between the contrast for a pixel in the second image frame and the contrast for a pixel of the boundary of the first image frame, the attenuation vector generating unit is configured to measure a difference between a contrast at a pixel of the second image frame and a contrast at a certain point of the boundary of the first image frame to generate a component of the attenuation vector, and the attenuation vector generating unit is configured to measure distances between the pixel of the second image frame and two different points of the boundary, and generates the component of the attenuation vector according to the distances and the inner product of components of the contrast at the pixel of the second image frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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receiving a video image having a first image frame and a second image frame, the second image frame being consecutive to the first image frame; and processing the video image to segment the second image frame based at least in part on information on the first image frame, wherein processing the video image comprises segmenting the first image frame to determine a boundary between a foreground and a background of the first image frame, generating an attenuation vector from the segmented first image frame, and attenuating the contrast of the second image frame by using the attenuation vector, the attenuation vector is generated based on a difference between the contrast for a pixel in the second image frame and the contrast for a pixel of the boundary of the first image frame, the generating an attenuation vector includes measuring a difference between a contrast at a pixel of the second image frame and a contrast at a certain point of the boundary of the first image frame to generate the component of the attenuation vector, and the generating an attenuation vector includes measuring distances between the pixel of the second image frame and two different points of the boundary, and generating the component of the attenuation vector according to the distances and the inner product of components of the contrast at the pixel of the second image frame. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A non-transitory computer-readable storage medium having stored thereon computer instructions that, when executed by a computer, cause the computer to perform a method comprising:
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receiving a video image having a first image frame and a second image frame, the second image frame being consecutive to the first image frame; and processing the video image to segment the second image frame based on information on the first image frame, wherein processing the video image comprises segmenting the first image frame to determine a boundary between a foreground and a background of the first image frame, generating an attenuation vector from the segmented first image frame, and attenuating the contrast of the second image frame by using the attenuation vector, the attenuation vector is generated based on a difference between the contrast for a pixel in the second image frame and the contrast for a pixel of the boundary of the first image frame, the generating an attenuation vector includes measuring a difference between a contrast at a pixel of the second image frame and a contrast at a certain point of the boundary of the first image frame to generate the component of the attenuation vector, and the generating an attenuation vector includes measuring distances between the pixel of the second image frame and two different points of the boundary, and generating the component of the attenuation vector according to the distances and the inner product of components of the contrast at the pixel of the second image frame.
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Specification