Image encryption method using line interlacing and image decryption apparatus therefor
AssigneeKorea Advanced Institute of Science and Technology
InventorsHeung Kyu Lee, Sang Keun Ji, Ji Hyeon Kang
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Abstract
An image encryption method. The method includes generating an adjusted secret image by adjusting an intensity range to be the same for each RGB channel of a secret image; generating a modulated image by repeating pixel modulation in block units on the adjusted secret image; and generating an interlaced image by interlacing odd-numbered lines of the adjusted secret image with even-numbered lines of the modulated image or interlacing even-numbered lines of the adjusted secret image with odd-numbered lines with the modulated image.
Claims20
An image encryption method, comprising:
- generating an adjusted secret image by adjusting an intensity range to be the same for each RGB channel of a secret image;
- generating a modulated image by repeating pixel modulation in block units on the adjusted secret image;
- and
- generating an interlaced image by interlacing odd-numbered lines of the adjusted secret image with even-numbered lines of the modulated image or interlacing even-numbered lines of the adjusted secret image with odd-numbered lines with the modulated image.
An image decryption apparatus, comprising:
- a decryption screen disposed between an encryption object including an interlaced image and a viewing position,
- wherein the interlaced image is generated by generating an adjusted secret image by adjusting an intensity range to be the same for each RGB channel of a secret image;
- generating a modulated image by repeating pixel modulation in block units on the adjusted secret image;
- and
- interlacing odd-numbered lines of the adjusted secret image with even-numbered lines of the modulated image or interlacing even-numbered lines of the adjusted secret image with odd-numbered lines with the modulated image.
A non-transitory computer-readable storage medium storing a computer program, wherein the computer program, when being executed by a processor, comprises:
- generating an adjusted secret image by adjusting an intensity range to be the same for each RGB channel of a secret image;
- generating a modulated image by repeating pixel modulation in block units on the adjusted secret image;
- and
- generating an interlaced image by interlacing odd-numbered lines of the adjusted secret image with even-numbered lines of the modulated image or interlacing even-numbered lines of the adjusted secret image with odd-numbered lines with the modulated image.
Dependencies are inferred from the claim text.