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US 2003/0206183 A1Published application
Method of digitally distorting an image while preserving visual integrity
OwnerD. Amnon Silversteininventor
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OwnerD. Amnon Silversteininventor
Estimating the term…
Methods of modifying source images and image streams are described. These methods may be used, for example, to remove embedded digital data from images or to prevent splicing modified portions of the images to recreate the source image. One method includes the receiving a request for a selected portion of a source image stream comprising a plurality of source image frames. A distorted grid is applied to the selected portion to generate a modified selected portion. The grid is distorted spatially, temporally, or both. The modified selected portion of the source image stream in response to the request. The distortion is designed to introduce frequency domain distortion sufficient to render any embedded data unrecoverable without introducing significant visually perceptible changes to the source image or image stream.
A method of modifying an image, comprising the steps of:
The method of 1 wherein step b) further comprises the step of interpolating values for each pixel of the modified image from corresponding pixels of the source image.
A method of modifying an image stream, comprising the steps of:
The method of 7 wherein step b) further comprises the step of performing a weighted spatial interpolation to determine a value for each pixel of a selected frame of the modified image stream from the spatially nearest pixels of a corresponding selected frame of the source image stream.
The method of 7 wherein step b) further comprises the step of performing a weighted temporal interpolation to determine a value for each pixel of a selected frame of the modified image stream from the spatially nearest pixels of the nearest frames of the source image stream.
A method of providing a portion of an image comprising the steps of:
A method of providing a portion of an image stream comprising the steps of:
Dependencies are inferred from the claim text.