초록 ▼

A region extraction system includes a temporary region extractor for temporarily extracting a to-be-extracted region from measured data with a region growing technique, an initial position determiner for determining an initial position of a standard model for the to-be-extracted region using the to-

A region extraction system includes a temporary region extractor for temporarily extracting a to-be-extracted region from measured data with a region growing technique, an initial position determiner for determining an initial position of a standard model for the to-be-extracted region using the to-be-extracted region temporarily extracted, and a to-be-extracted region extractor for extracting the to-be-extracted region from the measured data with a model fitting technique using the standard model.

대표청구항 ▼

1. A region extraction system comprising: an operation unit for designating a specified point by a user;a temporary candidate region determiner for temporarily determining a candidate region of a to-be-extracted region from measured data with a region growing technique wherein the candidate region i

1. A region extraction system comprising: an operation unit for designating a specified point by a user;a temporary candidate region determiner for temporarily determining a candidate region of a to-be-extracted region from measured data with a region growing technique wherein the candidate region is determined by expanding an area from the specified point;an initial position determiner for determining an initial position of a standard model based on said candidate region temporarily determined;a characteristic point extractor for extracting a characteristic point of said candidate region temporarily determined; anda to-be-extracted region extractor for extracting said to-be-extracted region from said measured data with a model fitting technique using said standard model,wherein said initial position determiner determines said initial position of said standard model on the basis of the degree of matching between said characteristic point of said candidate region temporarily determined and a corresponding characteristic point in said standard model and determines said initial position of said standard model so as to obtain a minimum sum of distances each between the corresponding characteristic point after the determination of said initial position of said standard model and each of a plurality of corresponding characteristic points of said to-be-extracted region. 2. The region extraction system according to claim 1, wherein said measured data is three-dimensional measured data, andsaid temporary candidate region determiner temporarily determines said candidate region as a three-dimensional region from said three-dimensional measured data with a three-dimensional region growing technique. 3. The region extraction system according to claim 1, wherein said temporary candidate region determiner starts region growing with said region growing technique from a plurality of starting points. 4. The region extraction system according to claim 1, wherein said initial position determiner aligns a position of gravity center of said standard model with a position of gravity center of said candidate region temporarily determined, to thereby determine said initial position of said standard model. 5. The region extraction system according to claim 1, wherein said model fitting technique associates a boundary pixel of said candidate region temporarily determined with a control point of said standard model, to thereby carry out a fitting process. 6. The region extractor according to claim 1, wherein said measured data is medical image data. 7. A computer-implemented method of extracting a to-be-extracted region from measured data, wherein the computer performs the method comprising the steps of: a) temporarily determining a candidate region of the to-be-extracted region from measured data with a region growing technique, wherein the candidate region is determined by expanding an area from a specified point designated by a user;b) determining an initial position of a standard model based on said candidate region temporarily determined;c) extracting said to-be-extracted region from said measured data with a model fitting technique using said standard model; andd) extracting a characteristic point of said candidate region temporarily determined,wherein said step b) includes the step of determining said initial position of said standard model on the basis of the degree of matching between said characteristic point of said candidate region temporarily determined and a corresponding characteristic point in said standard model and the step of determining said initial position of said standard model so as to obtain a minimum sum of distances each between the corresponding characteristic point after the determination of said initial position of said standard model and each of a plurality of corresponding characteristic points of said to-be-extracted region. 8. The computer-implemented method according to claim 7, wherein said measured data is three-dimensional measured data, andsaid step a) includes the step of temporarily determining said candidate region as a three-dimensional region from said three-dimensional measured data with a three-dimensional region growing technique. 9. The computer-implemented method according to claim 7, wherein said step a) includes the step of starting region growing with said region growing technique from a plurality of starting points. 10. The computer-implemented method according to claim 7, wherein said step b) includes the step of aligning a position of gravity center of said standard model with a position of gravity center of said candidate region temporarily determined, thereby determining said initial position of said standard model. 11. A non-transitory computer-readable medium encoded with computer-readable instructions capable of performing a region extraction by causing a computer to execute steps comprising: a) temporarily determining a candidate region of a to-be-extracted region from measured data with a region growing technique, wherein the candidate region is determined by expanding an area from a specified point designated by a user;b) determining an initial position of a standard model based on said candidate region temporarily determined;c) extracting said to-be-extracted region from said measured data with a model fitting technique using said standard model; andd) extracting a characteristic point of said candidate region temporarily determined,wherein said step b) includes the step of determining said initial position of said standard model on the basis of the degree of matching between said characteristic point of said candidate region temporarily determined and a corresponding characteristic point in said standard model and the step of determining said initial position of said standard model so as to obtain a minimum sum of distances each between the corresponding characteristic point after the determination of said initial position of said standard model and each of a plurality of corresponding characteristic points of said to-be-extracted region. 12. The non-transitory computer-readable medium according to claim 11, wherein said measured data is three-dimensional measured data, andsaid step a) includes the step of temporarily determining said candidate region as a three-dimensional region from said three-dimensional measured data with a three-dimensional region growing technique. 13. The non-transitory computer-readable medium according to claim 11, wherein said step a) includes the step of starting region growing with said region growing technique from a plurality of starting points. 14. The non-transitory computer-readable medium according to claim 11, wherein said step b) includes the step of aligning a position of gravity center of said standard model with a position of gravity center of said candidate region temporarily determined, thereby determining said initial position of said standard model. 15. A region extraction system comprising: an operation unit for designating a specified point by a user;a temporary candidate region determiner for temporarily determining a candidate region of a to-be-extracted region from measured data with a region growing technique wherein the candidate region is determined by expanding an area from the specified point;an initial position determiner for determining an initial position of a standard model based on said candidate region temporarily determined; anda to-be-extracted region extractor for extracting said to-be-extracted region from said measured data with a model fitting technique using said standard model,wherein said initial position determiner determines said initial position of said standard model on the basis of the degree of overlap between said standard model and said candidate region temporarily determined and determines said initial position of said standard model so as to increase the value of a predetermined function defined based on a total sum of the degree of overlap in said standard model and the degree of overlap in said to-be-extracted region regarding overlapping portions of said standard model and said to-be-extracted region. 16. A computer-implemented method of extracting a to-be-extracted region from measured data, wherein the computer performs the method comprising the steps of: a) temporarily determining a candidate region of the to-be-extracted region from measured data with a region growing technique, wherein the candidate region is determined by expanding an area from a specified point designated by a user;b) determining an initial position of a standard model based on said candidate region temporarily determined; andc) extracting said to-be-extracted region from said measured data with a model fitting technique using said standard model,wherein said step b) includes the step of determining said initial position of said standard model on the basis of the degree of overlap between said standard model and said candidate region temporarily determined and the step of determining said initial position of said standard model so as to increase the value of a predetermined function defined based on a total sum of the degree of overlap in said standard model and the degree of overlap in said to-be-extracted region regarding overlapping portions of said standard model and said to-be-extracted region. 17. A non-transitory computer-readable medium encoded with computer-readable instructions capable of performing a region extraction by causing a computer to execute steps comprising: a) temporarily determining a candidate region of a to-be-extracted region from measured data with a region growing technique, wherein the candidate region is determined by expanding an area from a specified point designated by a user;b) determining an initial position of a standard model based on said candidate region temporarily determined; andc) extracting said to-be-extracted region from said measured data with a model fitting technique using said standard model;wherein said step b) includes the step of determining said initial position of said standard model on the basis of the degree of overlap between said standard model and said candidate region temporarily determined and the step of determining said initial position of said standard model so as to increase the value of a predetermined function defined based on a total sum of the degree of overlap in said standard model and the degree of overlap in said to-be-extracted region regarding overlapping portions of said standard model and said to-be-extracted region.