Boundary line detecting method and apparatus, image processing method and apparatus, non-boundary line detecting method and apparatus
AssigneeGE Medical Systems Global Technology Company, LLC
InventorShigeru Matsumura
Life of this patent
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Abstract
To detect a boundary line between different objects in contact which appear to be the same object as their structural consistencies are identical or substantially identical, there are provided a motion vector detecting unit which calculates motion vectors in plural parts from plural images obtained at different times, a boundary block extracting unit which extracts a boundary block from the difference of motion vectors, and a boundary line estimating unit which estimates a boundary line based on the extracted boundary block.
Claims10
A processing apparatus comprising:
- means for detecting motion vectors of a plurality of parts having nearly the same consistencies in a first image or a second image from said first image obtained by imaging at a first time and from said second image obtained by imaging at a second time, said means for detecting comprising:
- means for forming a first high frequency component image and a second high frequency component image and for generating said motion vectors therefrom, and
- means for averaging said motion vectors;
- means for extracting a moving boundary between said first image and said second image from differences between said motion vectors of said plurality of parts, said means for extracting comprising:
- means for dividing said first image or said second image into a plurality of blocks,
- means for calculating average motion vectors for each block;
- and
- means for selecting a target block when said average motion vector thereof is a different sign;
- and
- means for estimating a boundary line between two or more objects which appear to be the same object in said first image or said second image, with different motion vectors based on said extracted moving boundary part.
A processing method comprising the steps of:
- detecting motion vectors of a plurality of parts having nearly the same consistencies in a first image or a second image from said first image obtained by imaging at a first time and from said second image obtained by imaging at a second time, said detecting step comprising the sub-steps of:
- forming a first high frequency component image and a second high frequency component image and for generating said motion vectors therefrom, and
- averaging said motion vectors;
- extracting a moving boundary between said first image and said second image from differences between said motion vectors of said plurality of parts, said extracting step comprising the sub-steps of:
- dividing said first image or said second image into a plurality of blocks,
- calculating average motion vectors for each block, and
- selecting a target block when said average motion vector thereof is a different sign;
- and
- estimating a boundary line between two or more objects which appear to be the same object in said first image or said second image, with different motion vectors based on said extracted moving boundary part.
Dependencies are inferred from the claim text.