Method for texturizing virtual three-dimensional objects
First Claim
1. Method for texturing a virtual three-dimensional object with a photographic image of a real object, the method comprising:
- obtaining a photographic image;
projecting the photographic image onto a virtual surface of the virtual three-dimensional object to generate a raw texture;
localizing a raw texture element within the raw texture by using a classification method;
describing the localized raw texture element in a computerized manner by a formal attribute set for the raw texture element;
comparing the formal attribute set of the raw texture element with an attribute set of predetermined library elements and determining similarity measures between the raw texture element and a library element; and
replacing the localized raw texture element with at least one library element if a predefined similarity measure is present, wherein the raw texture is transformed into a generalized texture of the virtual object by replacing all localized raw texture elements with library elements.
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Abstract
The invention relates to a method for texturizing virtual three-dimensional objects, particularly virtual three-dimensional building objects and city models with a photographic image (1) of a real object, particularly of a picture of a façade. The method is characterized by the following steps: Projecting the photographic image (1) onto a virtual surface (2) of the virtual three-dimensional object to produce a raw texture; localizing a raw texture element (3) in the raw texture by using a classification method; computer-compatible description of the localized raw texture element by a formal feature set for the raw texture element, particularly a feature vector; comparing the formal feature set of the raw texture element with each feature set of predefined library elements (4), and determining degrees of similarity between the raw texture element and each library element; replacing the localized raw texture element with at least one library element when a predefined degree of similarity is present, and reshaping the raw texture into a generalized texture (5) of the virtual object by replacing all raw texture elements with library elements.
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Citations
19 Claims
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1. Method for texturing a virtual three-dimensional object with a photographic image of a real object, the method comprising:
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obtaining a photographic image; projecting the photographic image onto a virtual surface of the virtual three-dimensional object to generate a raw texture; localizing a raw texture element within the raw texture by using a classification method; describing the localized raw texture element in a computerized manner by a formal attribute set for the raw texture element; comparing the formal attribute set of the raw texture element with an attribute set of predetermined library elements and determining similarity measures between the raw texture element and a library element; and replacing the localized raw texture element with at least one library element if a predefined similarity measure is present, wherein the raw texture is transformed into a generalized texture of the virtual object by replacing all localized raw texture elements with library elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification