Portable real-time DCT-based steganography using OpenCL

An Improved Image Steganography Scheme Based on Partial Preservation Embedding Algorithm for Wireless Visual Sensor Networks

“…(2) According to the embedding method described in equations (7) and (8), the proposed scheme could make the revised coefficients have regional distribution. at is to say, compared with the binarization treatment method designed in [19], the absolute value of stego coefficients in ISS-PPEA is larger, and the probability of misjudgement in the process of extracting sign is surely lower for the same AWGN. In other words, ISS-PPEA could improve the accuracy of information reconstruction.…”

“…By comparing ISS-PPEA with the similar embedding method proposed by Poljicak et al [19], it could be found that (1) In the scheme proposed by Poljicak, the binarization treatment for the coefficients selected by the embedding operation was carried out on the basis of the average of the medium-frequency DCT coefficient, which significantly affected the SSIM for the stego image and the cover image. In ISS-PPEA, the coefficients chosen by the embedding operation are modified by the partial preservation treatment method described in equations (7) and (8) based on the region adjustment parameter according to specific requirements for applications.…”

“…As mentioned above, the ISS-PPEA designed by this paper could improve the reconstruction precision for the scene information under noisy environment, comparing with current schemes based on hiding secret data in the LSB of the cover image in the spatial domain or embedding data into the coefficients of the high-frequency band in the transformational domain. When comparing with the binarization embedding treatment method designed in the literature [19], the partial preservation scheme is better at improving the imperceptibility and reconstruction accuracy of scene information, which is equivalent to improving the anti-interference performance.…”

“…In conclusion, the BCS-based steganography method exhibits low practical value because of its low embedding rate and poor universality. Later, some other research studies were proposed to hide secret images in the space of the medium-frequency band to boost the maximum embedding capacity and antijamming performance [18,19]. However, it would lead to a sharp decrease in the similarity between the stego image and cover image, which affected the imperceptibility of the secret image.…”

Special Issue: Real-Time Data Hiding and Visual Cryptography

“…The paper entitled ''Portable Real-Time DCT Based Steganography Using OpenCL'' by Poljicak et al [8] presents steganographic method with increased robustness to unintentional image processing attacks. The method is based on a discrete cosine transform (DCT) where the values of DCT coefficients are modified in order to hide data.…”