초록 ▼

To permit scaling or rotation of an image to be discerned--even if the original image is not available--certain marker signals are steganographically encoded in the image. In one particular implementation, encoding is effected by adding an overlay signal to the image. The overlay signal--when repres

To permit scaling or rotation of an image to be discerned--even if the original image is not available--certain marker signals are steganographically encoded in the image. In one particular implementation, encoding is effected by adding an overlay signal to the image. The overlay signal--when represented in the spatial frequency domain--includes a pattern of spots. If the image is scaled or rotated, this pattern changes in known ways. By examining the change in this pattern, the distortion (i.e., scale/rotation) of the image can be inferred. This technology finds particular application in conjunction with watermarking systems, permitting recovery of watermark data from images that have been scaled or rotated subsequent to watermarking.

대표청구항 ▼

To permit scaling or rotation of an image to be discerned--even if the original image is not available--certain marker signals are steganographically encoded in the image. In one particular implementation, encoding is effected by adding an overlay signal to the image. The overlay signal--when repres

To permit scaling or rotation of an image to be discerned--even if the original image is not available--certain marker signals are steganographically encoded in the image. In one particular implementation, encoding is effected by adding an overlay signal to the image. The overlay signal--when represented in the spatial frequency domain--includes a pattern of spots. If the image is scaled or rotated, this pattern changes in known ways. By examining the change in this pattern, the distortion (i.e., scale/rotation) of the image can be inferred. This technology finds particular application in conjunction with watermarking systems, permitting recovery of watermark data from images that have been scaled or rotated subsequent to watermarking. ly of claim 1, wherein said base end of said shell comprises a bottom ledge for securing said base cap within said shell. 9. The battery assembly of claim 8, wherein said bottom ledge is formed by crimping said base end inwardly over said base cap. 10. The battery assembly of claim 8, wherein said bottom ledge is formed by a metal ring welded circumferentially at said base end. 11. The battery assembly of claim 1, wherein said base end of said metal shell comprises a circumferential groove for placement of said base cap thereover during the manufacture of said battery assembly. 12. The battery assembly of claim 11, wherein said base cap is crimped circumferentially over said groove within said base cap. 13. The battery assembly of claim 1 further comprising a cathode assembly positioned at the base end of said battery assembly. 14. The battery assembly of claim 13, wherein said base cap comprises one or more holes for air access into said cathode assembly. 15. The battery assembly of claim 13, wherein said cathode assembly comprises an air diffusion-limiting element. 16. The battery assembly of claim 13, wherein said cathode assembly comprises an air distribution element. 17. The battery assembly of claim 13, wherein said cathode assembly comprises an air-permeable hydrophobic element for allowing air access into the interior of said battery assembly while minimizing moisture penetration of said battery assembly. 18. The battery assembly of claim 1, wherein an electrical terminal of said battery assembly is formed by a conductive surface on the exterior of said battery assembly which is adapted to be contacted by an electrically conductive contact pad associated with said hearing device. 19. The battery assembly of claim 1, wherein an electrical terminal is formed by an external electrical wire soldered or welded onto an external conductive surface of said battery assembly. 20. The battery assembly of claim 1, wherein an electrical terminal is formed by a protruding pin soldered or welded onto an external conductive surface of said battery assembly. 21. The battery assembly of claim 1, wherein said shell comprises a retention ledge at the top of its base end for securing a cathode assembly and a grommet within said base end. 22. The battery assembly of claim 21, wherein said retention ledge is formed by a ring welded to the interior walls of said shell. 23. The battery assembly of claim 21, wherein said retention ledge is formed by a ring brazed to the interior walls of said shell. 24. The battery assembly of claim 21, wherein said retention ledge is formed by a collapsed bead along said shell. 25. A metal-air battery assembly associated with a canal hearing device, said battery assembly comprising: an anode can cylindrically elongated and medially tapered with length (L) along the longitudinal axis of an ear canal when said hearing device is positioned within the ear canal, said anode can having an oval cross section with a long diameter (DL) and short diameter (DS) across its cross section, said length (L) being greater than said short diameter (DS), said anode can laterally comprising a base end having an opening therein forming a cavity within said anode can; a cathode cup covering said opening of said anode can, said cathode cup comprising one or more air holes for air access into said battery assembly; and a sealing element comprising an insulator material inserted in a sealing manner between said base end of said anode can and said cathode cup; said cathode cup being concentrically positioned within said base end of said anode can and secured therein partially by an inward ledge within said base end of said anode can. 26. The battery assembly of claim 25, wherein said anode can has thickness of less than 0.2 mm. 27. The battery assembly of claim 25, wherein the ratio of long diameter (DL) to short diameter (DS) is about 1.5. 28. The battery assembly of claim