Method and system for identifying illumination fields in an image
AssigneeTandent Vision Science, Inc.
InventorsCasey Smith, Richard Friedhoff, Bruce Maxwell
Life of this patent
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Abstract
In a first exemplary embodiment of the present invention, an automated, computerized method is provided for determining an illumination field in an image. The method comprises the steps of identifying uniform and linear tokens in the image and utilizing the uniform and linear tokens to identify an illumination field.
Claims16
An automated, computerized method for determining an illumination field in an image, comprising the steps of:
- identifying linear tokens in the image;
- and
- utilizing the linear tokens to identify an illumination field.
An automated, computerized method for determining shadow/lit pixels of an image, comprising the steps of:
- identifying uniform tokens in the image;
- and
- utilizing the uniform tokens to identify shadow/lit pixels of the image.
An automated, computerized method for determining a shadow in an image, comprising the steps of:
- calculating a characteristic spectral ratio for the image;
- and
- utilizing the characteristic spectral ratio to identify a shadow in the image.
An automated, computerized method for determining a material edge in an image, comprising the steps of:
- calculating an illumination gradient for the image;
- and
- utilizing the illumination gradient to identify a material edge in the image.
An automated, computerized method for determining an illumination field in an image, comprising the steps of:
- identifying tokens in the image;
- clustering the identified tokens into groups;
- and
- utilizing the token groups to identify an illumination field.
Dependencies are inferred from the claim text.