Extension persistence mechanism for a digital image format
First Claim
Patent Images
1. A method for creating an image file that supports and selectively maintains extensions, comprising the step of:
- providing a header, image data, non-image data and a plurality of extension portions; and
said extension portions including extension data having a size and an extension persistence value selected to indicate if extension data is to be maintained as part of the image file when modifications have been made to the image data portions of the image file.
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Abstract
An image file structure that supports and selectively maintains extensions is disclosed incorporating, a header, image data, non-image data and extension portions. Each extension portion includes extension data and an extension persistence value that is selected to indicate if extension data is to be maintained as part of the image file when modifications have been made to the image data portions of the image file or not.
38 Citations
11 Claims
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1. A method for creating an image file that supports and selectively maintains extensions, comprising the step of:
providing a header, image data, non-image data and a plurality of extension portions; and
said extension portions including extension data having a size and an extension persistence value selected to indicate if extension data is to be maintained as part of the image file when modifications have been made to the image data portions of the image file.- View Dependent Claims (2, 3, 4, 5)
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6. A computer system for executing an image file that supports and selectively maintains extensions, comprising:
means for reading and executing a header, image data, non-image data and extension portions of the image file wherein said extension portions including extension data and an extension persistence value selected to indicate if extension data is to be maintained as part of the image file when modifications have been made to the image data portions of the image file.
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7. A storage media having stored thereon an image file comprising:
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a header; image data; extension data; and an extension persistence property having one state for disassociating said extension data from said image data when said image data is modified, and a second state for maintaining said extension data with said image data independent of modifications to said image data. - View Dependent Claims (8, 9, 10, 11)
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Specification