Reversible data hiding of full color JPEG2000 compressed bit-stream preserving bit-depth information

We present a lossless data hiding method for JPEG2000 compressed data based on the reversible information hiding for binary images we have proposed. In JPEG2000 compression, full color images with RGB three colors are transformed to YCrCb color space, and then, for each color component, wavelet transform, quantization and entropy coding are performed independently. The wavelet coefficients of each color component are quantized, therefore, a least significant bit plane (LSB) would be extracted. The proposed method embeds additional information to be hidden into the quantized wavelet coefficients of the Y color component in a reversible way. To realize this, we embed not only secret data and a JBIG2 bit-stream of a part of the LSB plane but also the bit-depth of the quantized coefficients on some code-blocks. Experimental results demonstrate the feasibility of an application of the proposed method to image alteration detection for JPEG2000 compressed data.