High Capacity Information Hiding Method Based on Pixel-value Adjustment with Modulus Operation

• Teng Li,
• Yu Zhang,
• Sha Wang,
• Jun-jie Sun,

Vol. 15, No. 4, April 30, 2021
10.3837/tiis.2021.04.018, Download Paper (Free):

• Cover-image
• Hiding Capacity
• Information Hiding
• Modulus Operation
• stego-image

Abstract

Through information hiding technique, secret message can be hidden in pictures. Stego-image quality and hiding capacity are two important metrics for information hiding. To enhance these metrics, many schemes were proposed by scholars in recent years. Some of them are effective and successful, but there is still a room for further improvement. A high capacity information hiding scheme (PAMO, Pixel-value Adjustment with Modulus Operation Algorithm) is introduced in this paper. PAMO scheme uses pixel value adjustment with modulus operation to hide confidential data in cover-image. PAMO scheme and some referenced schemes are implemented in Python and experiments are carried out to evaluate their performance. In the experiments, PAMO scheme shows better performance than other methods do. When secret message length is less than 72000 bits, the highest hiding capacity of PAMO can reach 7 bits per pixel, at the same time the PSNR of stego-images is greater than 30 dB.

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