Method for retrieving database of image information
First Claim
1. A method of retrieving image information from a database, comprising the steps of:
- entering a retrieving keyword from a retrieval display unit for processing data input and output;
reading an index, representing position information corresponding to said retrieving keyword by using said retrieving keyword, from a data file unit storing image data;
retrieving candidate image data first by using said index;
retrieving detailed image data next by using said index;
wherein said step of retrieving said candidate image data and said step of retrieving detailed image data constitute a two-stage retrieving step, and wherein said two-stage retrieving step retrieves image data corresponding to said index from said data file unit; and
displaying said retrieved image data on said retrieval display unit;
wherein said step of retrieving said detailed image data includes a step of representing by a polynomial information a quadrangle area of said image data stored in said data file unit, said quadrangle area being defined by four corner coordinates thereof, and a step of judging through a polynomial judgment whether said retrieving keyword is included within an area defined by said polynomial.
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Abstract
A retrieving key representing position information is used to retrieve image information containing the retrieving key information at a high speed and high precision. First a retrieving key is inputted to display retrieval information. The retrieving key is used to retrieve an image having a large size relative to a geometric distortion error, and the longitude/latitude conversion coefficients of the retrieved image are corrected. By using the corrected longitude/latitude conversion coefficients, an image having a small size relative to the geometric distortion error is retrieved, and the retrieved image is subject to distortion correction and image magnification.
70 Citations
25 Claims
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1. A method of retrieving image information from a database, comprising the steps of:
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entering a retrieving keyword from a retrieval display unit for processing data input and output; reading an index, representing position information corresponding to said retrieving keyword by using said retrieving keyword, from a data file unit storing image data; retrieving candidate image data first by using said index; retrieving detailed image data next by using said index; wherein said step of retrieving said candidate image data and said step of retrieving detailed image data constitute a two-stage retrieving step, and wherein said two-stage retrieving step retrieves image data corresponding to said index from said data file unit; and displaying said retrieved image data on said retrieval display unit; wherein said step of retrieving said detailed image data includes a step of representing by a polynomial information a quadrangle area of said image data stored in said data file unit, said quadrangle area being defined by four corner coordinates thereof, and a step of judging through a polynomial judgment whether said retrieving keyword is included within an area defined by said polynomial. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of retrieving image information from a database, comprising the steps of:
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entering a retrieving keyword representing the position of an object from a retrieval display unit for processing data input and output; providing a data file unit storing image data of the object, reference image data, a relevant information table, an index approximately corresponding to said retrieving keyword, and a latitude/longitude conversion coefficient therein; reading said index from said data file unit; designating a macro object having a large size relative to a geometric distortion error of said image data, by using said index; retrieving said image data including said macro object and said reference image data including said macro object; displaying said retrieved image data and reference image data in a juxtaposed layout; entering, from the retrieval display unit, positions of a same object for said retrieved image data and reference image data displayed in said juxtaposed layout; measuring a retrieval error between said two entered positions; correcting said latitude/longitude conversion coefficient registered in said relevant information table by using said retrieval error; registering said corrected latitude/longitude conversion coefficient again in said data file unit; correcting a local geometric distortion error of said image data by using said registered corrected latitude/longitude conversion coefficient; and displaying said image data corrected for said local geometric distortion error on said retrieval display unit. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of retrieving image information from a database, comprising the steps of:
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entering a retrieving keyword representing a position of an object from a retrieval display unit for processing data input and output; providing a data file unit storing image data, reference image data, a relevant information table, object position information corresponding to said retrieving keyword, and a latitude/longitude conversion coefficient therein; retrieving, from said data file unit, a position of a macro object having a large size relative to a geometric distortion error of said image data by using said retrieving keyword; measuring a retrieval error through comparison between said image data and reference image data regarding said retrieved position of said macro object; correcting a local geometric distortion error of said image data by correcting said latitude/longitude conversion coefficient by using said retrieval error; and retrieving, from said data file unit, a position of a micro object having a small size relative to a geometric distortion error of said image data, by using said retrieving keyword and said corrected latitude/longitude conversion coefficient.
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Specification