Quality Measurements of Lossy Image Steganography Based on H-AMBTC Technique Using Hadamard Transform Domain

Steganography is a type of image information concealing technique which hides a secret message in a different media such as image, video and audio etc, called cover file. The main idea of steganography is to provide security to private or public data. In this paper we combined among Hadamard transformation and Absolute Moment Block Truncation Coding to make a new concept called (H-AMBTC), this concept used for compressing the cover file and conceal the secret data into the cover file. The H-AMBTC compression is not only image compression, but it is more than the AMBTC technique as only half of the number of pixels in the binary converted image are transmitted. In this paper, the comparison process of the H-AMBTC technique is done for 2x2, 4x4, 8x8 and 16x16 block sizes. HAMBTC is a lossy technique as the cover image and the secret image can be recovered completely. Keywords— H-AMBTC, AMBTC, PSNR, Hadamard transform, Image information concealing, Steganography.