Bit Plane Coding based Steganography Technique for JPEG2000 Images and Videos

In this paper, a Bit Plane Coding ( BPC ) based steganography technique for JPEG 2000 images and Motion JPEG 2000 video is proposed. Embedding in this technique is performed in the lowest significant bit planes of the wavelet coefficients of a cover image. In JPEG 2000 standard, the number of bit planes of wavelet coefficients to be used in encoding is dependent on the compression rate and are used in Tier -2 process of JPEG 2000. In the proposed technique, Tier -1 and Tier -2 processes of JPEG 2000 and Motion JPEG 2000 are executed twice on the encoder side to collect the information about the lowest bit planes of all code blocks of a cover image, which is utilized in embedding and transmitted to the decoder. After embedding secret data, Optimal Pixel Adjustment Process ( OPAP ) is applied on stego images to enhance its visual quality. Experimental results show that proposed technique provides large embedding capacity and better visual quality of stego images than existing steganography techniques for JPEG 2000 compressed images and videos. Extracted secret image is similar to the original secret image.