×

Image encrypting method and device, image decrypting method and device, and recording medium

  • US 6,456,985 B1
  • Filed: 08/25/1999
  • Issued: 09/24/2002
  • Est. Priority Date: 08/25/1998
  • Status: Active Grant
First Claim
Patent Images

1. An image encrypting method comprising the steps of:

  • decomposing original image data into a plurality of components;

    encrypting a plurality of desired components from among said components;

    preparing encrypting information representing the contents of the encryption;

    generating an encrypted image file from said encrypted components which have been encrypted, and non-encrypted components which have not been encrypted; and

    attaching said encrypting information to the encrypted image file;

    wherein said components are any of;

    resolution image data obtained by decomposing said original image data into a plurality of resolutions;

    luminance image data and chromaticity information data of said original image data;

    frequency data representing the spatial frequency components of said original image data.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×