Method and apparatus for hiding one image or pattern within another
February 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAdaptive block transform image coding method and apparatus Adaptive scaling for decoding spatially periodic self-clocking glyph shape codes Convolution filtering for decoding self-clocking glyph shape codes Binary image processing for decoding self-clocking glyph shape codes Methods and means for reducing bit error rates in reading self-clocking glyph codes Self-clocking glyph code for encoding dual bit digital values robustly Method and apparatus for halftoning and inverse halftoning and the transmission of such images Method and apparatus for compressing and decompressing image data Spatial filter for an image processing system Method and apparatus for determining visually perceptible differences between images InventorApplicationNo. 596818 filed on 02/05/1996US Classes:382/284, Combining image portions (e.g., portions of oversized documents)358/1.9, Attribute control358/501, Image reproduction358/532, Sharpness emphasizing382/232, IMAGE COMPRESSION OR CODING382/260, Image filter382/270Variable threshold, gain, or slice levelExaminersPrimary: Boudreau, Leo H.Assistant: Mariam, Daniel G. Attorney, Agent or FirmInternational ClassesG06K 9/3/69./38 9/40 9/46 AbstractA method of hiding a first image in a second image to produce a combined image includes the steps of: a) modifying the first image according to the content of the second image, so that when the modified first image is added to the second image to produce the combined image, no visible differences will exist between the second image and the combined image; and b) adding the modified first image to the second image to produce the combined image.Other References
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