Search

Advanced internet technology allows unauthorized individuals to modify and distribute digital images. Image watermarking is a popular solution for copyright protection and ensuring digital security. This research presents an embedding scheme with a set of conditions using non-subsampled Shearlet transform (NSST), lifting wavelet transform (LWT), and discrete cosine transform (DCT). Red and green channels are employed for the embedding process. The red channel is converted by NSST-LWT. The low-frequency area (LL) frequency is then split into small blocks of 8×8, each partition block is then transformed by DCT. The DCT coefficient of (3,4), (5,2), (5,3), (3,5), called matrix M1, and (2,5), (4,3), (6,2), (4,4), called matrix M2 are selected for singular value decomposition (SVD) process. With a set of conditions, the watermark bits are incorporated into those singular values. The green channel is cropped to get the center image before splitting into 4×4 pixels. The block components are then selected based on the least entropy value for the embedding regions. The selected blocks are then computed using LWT-SVD. A set of conditions for U(1,1) and U(2,1) are used to incorporate the watermark logo. The experimental findings reveal that the suggested scheme achieves high imperceptibility and resilience under various evaluating attacks with an average peak signal-to-noise ratio (PSNR) and correlation value (NC) values are up to 43.89 dB and 0.96, respectively. [ABSTRACT FROM AUTHOR]

Due to the expression of sharing information, there has been an increase in interest in safeguarding multimedia information and copyrights in recent times. Attackers are attempting to obtain sensitive information from a variety of sources, emphasizing the significance of data security. Singular value decomposition (SVD) is used to ensure data confidentiality and authenticity, and several researchers used strategies to obscure hidden information. The false-positive error problem of SVD is diminished due to the presence of an embedded watermark image and there is no possibility of counterfeit. By integrating with discrete wavelet transform (DWT), the performance is improved as well as the error is minimized. The secure watermarks has been hidden based on singular value decomposition discrete wavelet transform for 2 dimension (SVD-DWT2D). Then this secure watermark symbols are analysed using reversible data concealing alongside other watermarking techniques which are used frequently for securing the data privacy. The best threshold value is determined for evaluating the originality and the complicated frames are selected after the testing process. The video quality is predicted based on the threshold value. The UCF101 dataset is determined to validate the efficiency of the proposed method and, thus, enhanced the video quality. The proposed method achieves greater ability and video quality of 69db PSNR value and 0.362 MSE value, respectively. Based on the experimental analysis the proposed SVD-DWT2D based reversible data concealing model attained optimal results in securing the digital video by incorporating featured watermarks in the video sequence. [ABSTRACT FROM AUTHOR]

The modern internet technology enables unauthorized individuals to alter the content of digital images. This work introduces a method for enhancing the robustness of an embedded watermark in images using Lifting Wavelet Transform (LWT) and Hessenberg Decomposition. This study utilizes Hessenberg Decomposition (HD) to insert a watermark image into the LL-sub band of the LWT transform. Singular Value Decomposition (SVD) is employed to convert the H value of HD. Subsequently, the watermark image is put into the singular value. The suggested system underwent testing against a range of image processing assaults, including compression, filters, and noise additions. The testing was conducted using multiple watermark sizes, specifically 256×256, 128×128, and 64×64 pixels. The experimental results demonstrate exceptional imperceptibility, with an average PSNR value of 39.5640 dB and a SSIM value of 0.9993. The results demonstrate a high level of resilience, as indicated by the NC value of 0.96390.

With the increasing awareness of citizen copyright, more and more images containing watermarks are appearing in daily life. However, existing research shows that images with watermarks can cause neural network misclassification, posing a significant threat to the popularization and application of neural networks. Adversarial training is one of the defensive methods to solve this problem, but it requires a large number of watermark adversarial samples as training data. To address this issue, this paper proposes a visible watermark adversarial attack method based on intelligent evolutionary algorithm to generate high-intensity watermark adversarial samples. This method can not only quickly generate watermark adversarial samples, but also maximize the attack on the neural network. In addition, this method incorporates image quality evaluation metrics to constrain the visual loss of the image, making the watermark adversarial samples more visually appealing. The comprehensive experimental results show that the proposed method has lower time complexity than the benchmark watermark attack method, and has a higher attack rate on neural networks compared to the benchmark black box attack. [ABSTRACT FROM AUTHOR]

This paper proposes a new robust scheme to provide copy protection services to Deep Nural Network (DNN) models using digital watermarks. The rationale of the proposed technique is that robustness can be achieved by embedding a large watermark that can span the whole watermark. If an adversary attempts to destroy the watermark, he will end up destroying the DNN model. However, maximizing the embedding capacity will strongly degrade the performance of the DNN model. To control the performance-capacity-robustness trade-of, the proposed scheme utilizes the Discrete Cosine Transform (DCT) due to its strong compaction property, which becomes even stronger when applied to correlated segments of data. Therefore, the proposed technique extracts the DNN weights and groups them within correlated segments before applying the DCT. The experimental results have proven the effectiveness of the proposed DNN watermarking scheme as it was able to embed 1.73 Mb of data with only a 1.4% drop in the classification accuracy of a standard Residual Neural Network with 21 Convolutional layers. [ABSTRACT FROM AUTHOR]

Most frequency-domain remote sensing image watermarking algorithms embed watermarks at random locations, which have negative impact on the watermark invisibility. In this study, we propose an adaptive watermarking scheme for remote sensing images that considers the information complexity to select where to embed watermarks to improve watermark invisibility without affecting algorithm robustness. The scheme converts remote sensing images from RGB to YCbCr color space, performs two-level DWT on luminance YY, and selects the high frequency coefficient of the low frequency component (HH2Y) as the watermark embedding domain. To achieve adaptive embedding, HH2Y is divided into several 8*8 blocks, the entropy of each sub-block is calculated, and the block with the maximum entropy is chosen as the watermark embedding location. During embedding phase, the watermark image is also decomposed by two-level DWT, and the resulting high frequency coefficient (HH2W) is then embedded into the block with maximum entropy using α- blending. The experimental results show that the watermarked remote sensing images have high fidelity, indicating good invisibility. Under varying degrees of geometric, cropping, filtering, and noise attacks, the proposed watermarking can always extract high identifiable watermark images. Moreover, it is extremely stable and impervious to attack intensity interference. [ABSTRACT FROM AUTHOR]

Present age is the age of technology where we are all flooded with digital data. As the use of data is increasing day by day, the techniques and algorithms for data manipulation are also increasing at a rapid rate. The advancement in technology has brought about a revolution which has led to identification of various ways and techniques for modification and enhancement of images. On the other hand it also brings various challenges with respect to the prevention of tampering, forging or misuse of electronic data in form of image, audio or video. Digital watermarking can prove to be a very useful technique in prevention of any such scenario. Verifying the integrity of delicate images, such as medical photos, is crucial since even the smallest distortion or alteration might lead to a wrong diagnosis. Especially in digital images, watermarking techniques give protection from any such attack to a large extent. This research paper proposes a novel approach to digital image watermarking using a combination of Fibonacci scrambling, rotational embedding, and the Discrete Cosine Transform (DCT). The objective of the proposed algorithm is to bolster the security and resilience of the watermarking process through the incorporation of supplementary encryption and obfuscation mechanisms. We have implemented the code for this algorithm in Python. [ABSTRACT FROM AUTHOR]

Digital watermarking is an essential tool for numerous applications, and the quality of watermarked images must be assessed using accurate criteria. Peak Signal-to-Noise Ratio (PSNR), a widely used image assessment metric, has limits when evaluating images containing noise, such as watermarks. To tackle such kind of issues this, this study investigates a different assessment metric, the Neutrosophic Similarity Measure, and assesses its performance in evaluating watermarked images when compared to PSNR. Similarities to ascertain whether the neutrosophic similarity Measure has a higher noise tolerance and offers a more accurate evaluation of watermarked images. The results show that Neutrosophic Similarity Measure overcomes PSNR in capturing the influence of additive watermarks and demonstrating superior noise tolerance through experimental evaluation on a dataset of watermarked images. These findings highlight the possibility of adopting new assessment metric, such as neutrosophic similarity measure, for assessing watermarked images, thereby enhancing the effectiveness of evaluating watermarked Images.

Watermarking is an important copyright protection technology which generally embeds the identity information into the carrier imperceptibly. Then the identity can be extracted to prove the copyright from the watermarked carrier even after suffering various attacks. Most of the existing watermarking technologies take the nature images as carriers. Different from the natural images, document images are not so rich in color and texture, and thus have less redundant information to carry watermarks. This paper proposes an end-to-end document image watermarking scheme using the deep neural network. Specifically, an encoder and a decoder are designed to embed and extract the watermark. A noise layer is added to simulate the various attacks that could be encountered in reality, such as the Cropout, Dropout, Gaussian blur, Gaussian noise, Resize, and JPEG Compression. A text-sensitive loss function is designed to limit the embedding modification on characters. An embedding strength adjustment strategy is proposed to improve the quality of watermarked image with little loss of extraction accuracy. Experimental results show that the proposed document image watermarking technology outperforms three state-of-the-art methods in terms of the robustness and image quality. [ABSTRACT FROM AUTHOR]

This paper introduces the Watermark Imaging System (WImSy) which can be used to photograph, document, and study sheets of paper. The WImSy provides surface images, raking light images, and transmitted light images of the paper, all in perfect alignment. We develop algorithms that exploit this alignment by combining several images together in a process that mimics both the “surface image removal” technique and the method of “high dynamic range” photographs. An improved optimization criterion and an automatic parameter selection procedure streamline the process and make it practical for art historians and conservators to extract the relevant information to study watermarks. The effectiveness of the method is demonstrated in several experiments on images taken with the WImSy at the Metropolitan Museum of Art in New York and at the Getty Museum in Los Angeles, and the results are compared with manually optimized images.

Secure data transmission is critical in public video surveillance applications such as tracking missing persons in large crowd gatherings. It may help the security personnel to monitor & record the live feeds from multiple cameras. However, this live streaming could be falsified. Various cryptographic techniques have been proposed to ensure the integrity of transmitted images, but continuous attacks still pose serious challenges to ensuring the integrity and authenticity of transmitted images. This work proposes a new chaotic-based watermarking technique to ensure the integrity of the transmitted video frames, and since the frames come from multiple cameras, the scheme should be as simple as possible and as fast as possible, the simplicity manifests in designing a fragile watermarking scheme therefore, the watermark is to be embedded in the spatial domain by direct manipulation of the values of the cover’s pixels. To ensure the security of the proposed scheme, chaotic maps have been deployed to reach an acceptable level of security with minimum computational overhead. The proposed scheme is novel in design in terms of the chaotic maps used and it is tested in challenging large gathering scenario. Experimental results demonstrate that the proposed method successfully locates any falsification in the transmitted images, and the performance of the scheme evaluates different types of attacks. Our testing results in good rate tamper of detection with TPR=99.2005, TNR=99.0777 and with a good quality of imperceptibility for the watermarked image with PSNR=43.82dB, SSIM=00.9955.

A zero-watermarking algorithm for color image based on lifting wavelet transform (LWT), singular value decomposition (SVD) and chaotic system is proposed in this paper. Firstly, the characteristics of a 5-D chaotic system are analyzed by phase diagrams, Lyapunov exponent spectrums and bifurcation diagrams. The initial conditions of the chaotic system are changed by hash value calculated from the watermark image. Then, feature information of low-frequency region of color image is extracted by LWT, and the maximum singular value is obtained by improved SVD. Based on chaos correction factor, the feature matrix can be extracted and encrypted by SVD simultaneously. And the watermark image is composed of meaningful single watermark or combined watermark. Finally, zero-watermarking is generated by encryption and logical operation of feature matrix and watermark image. During authentication, the watermark image can be extracted from the color image and the registered zero-watermarking, and the copyright ownership can be determined according to the registration time. This algorithm can effectively protect image copyright without changing image and has good robustness. Experiments verify the effectiveness of the algorithm and its ability to resist filtering, compression, rotation, noise and clipping attacks, and the NC value of each attack is higher than 89%. [ABSTRACT FROM AUTHOR]

The move to a digital environment, where consumers may utilise, process, store, and transfer their data, has occurred in recent years. Furthermore, the quick and ongoing evolution of the Internet of Things (IoT) has resulted in a massive increase in the utilisation of digital signals and images. The Internet of Things (IoT) is a huge and varied network of connected devices, everyday objects, and gadgets that can communicate with one another over the Internet. The Internet of Things has a lot of potential to become a part of everyday life and improve people's lives. In recent decades, digital tattooing has been offered as a great way to handle numerous elements of IoT security. This technology works by embedding a digital signal called a digital tattoo into another digital signal called a host signal, which can be text, image, audio, or video. The principle of this approach is to detect changed pixels using the Cyclic Redundancy Check (CRC) code. The CRC is a data integrity check that is both powerful and simple to use. It is the most used method of mistake detection in telecommunications. For these reasons, it has been used in the context of the fragile tattoo to determine whether or not the picture has been altered. The experimental results show that the proposed schemes perform well in contrast to the existing scheme and use traditional evaluation criteria, proving that the new scheme is distinctive. [ABSTRACT FROM AUTHOR]

Copyright of Baghdad Science Journal is the property of Republic of Iraq Ministry of Higher Education & Scientific Research (MOHESR) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Protecting the integrity of images has become a growing concern due to the ease of manipulation and unauthorized dissemination of visual content. This article presents a comprehensive approach to safeguarding images' authenticity and reliability through watermarking techniques. The main goal is to develop effective strategies that preserve the visual quality of images and are resistant to various attacks. The work focuses on developing a watermarking algorithm in Python, implemented with embedding in the spatial domain, transformation in the frequency domain, and pixel modification techniques. A thorough evaluation of efficiency, accuracy, and robustness is performed using numerical metrics and visual assessment to validate the embedded watermarks. The results demonstrate the algorithm's effectiveness in protecting the integrity of the images, although some attacks may cause visible degradation. Likewise, a comparison with related works is made to highlight the relevance and effectiveness of the proposed techniques. It is concluded that watermarks are presented as an additional layer of protection in applications where the authenticity and integrity of the image are essential. In addition, the importance of future research that addresses perspectives for improvement and new applications to strengthen the protection of the goodness of pictures and other digital media is highlighted. [ABSTRACT FROM AUTHOR]

This paper introduces the Watermark Imaging System (WImSy) which can be used to photograph, document, and study sheets of paper. The WImSy provides surface images, raking light images, and transmitted light images of the paper, all in perfect alignment. We develop algorithms that exploit this alignment by combining several images together in a process that mimics both the "surface image removal" technique and the method of "high dynamic range" photographs. An improved optimization criterion and an automatic parameter selection procedure streamline the process and make it practical for art historians and conservators to extract the relevant information to study watermarks. The effectiveness of the method is demonstrated in several experiments on images taken with the WImSy at the Metropolitan Museum of Art in New York and at the Getty Museum in Los Angeles, and the results are compared with manually optimized images. [ABSTRACT FROM AUTHOR]

At the dawn of the 20th century, the development of the X‐ray and new‐found visions of the interior of bodies inspired artists including Marcel Duchamp. Visual artist and architect Paul O Robinson explores these 'bones and organs' within contemporary contexts, artistically exploiting the shadowy, invisible world of interiority, visible exterior form and the uncanny correspondence between them through transformative spatial and material manifestations. [ABSTRACT FROM AUTHOR]

In the era of big data, data sharing not only boosts the economy of the world but also brings about problems of privacy disclosure and copyright infringement. The collected data may contain users' sensitive information; thus, privacy protection should be applied to the data prior to them being shared. Moreover, the shared data may be re-shared to third parties without the consent or awareness of the original data providers. Therefore, there is an urgent need for copyright tracking. There are few works satisfying the requirements of both privacy protection and copyright tracking. The main challenge is how to protect the shared data and realize copyright tracking while not undermining the utility of the data. In this article, we propose a novel solution of a reversible database watermarking scheme based on order-preserving encryption. First, we encrypt the data using order-preserving encryption and adjust an encryption parameter within an appropriate interval to generate a ciphertext with redundant space. Then, we leverage the redundant space to embed robust reversible watermarking. We adopt grouping and K-means to improve the embedding capacity and the robustness of the watermark. Formal theoretical analysis proves that the proposed scheme guarantees correctness and security. Results of extensive experiments show that OPEW has 100% data utility, and the robustness and efficiency of OPEW are better than existing works. [ABSTRACT FROM AUTHOR]

Illegal distribution of digital data is a common danger in the film industry, especially with the rapid spread of the Internet, where it is now possible to easily distribute pirated copies of digital video on a global scale. The Watermarking system inserts invisible signs to the video content without changing the content itself. The aim of this paper is to build an invisible video watermarking system with high imperceptibility. Firstly, the watermark is confused by using the Arnold transform and then dividing into equal, non-overlapping blocks. Each block is then embedded in a specific frame using the Discrete Wavelet Transform (DWT), where the HL band is used for this purpose. Regarding the method of selecting the host frames, the chaotic map (tent map) was used to choose a number of frames which are greater or equal to the number of blocks of the watermark. The host frame selection method makes the discovery of the watermark information by illegal means very complicated. The experimental results show that the proposed method can produce excellent transparency with robustness against some attacks where the average_ PSNR reaches to 72.806. [ABSTRACT FROM AUTHOR]

Two of the most important task metrics that measure data-mining performance specific to big data: one is real-time and the other is accuracy. The stream data flows from data generation to message queue and then into Flink through data source for calculation. In this process, due to different network transmission speed and different computing performance of different nodes, the sequence of stream data entering the computing framework and the time sequence of events generated by data will be partially out of order. The traditional watermark mechanism for window-facing operations cannot consider the real-time performance and accuracy of the operation results in the case of streaming data with uncertain out-of-order degree. To solve this problem, a stream data microcluster model is established. Based on the local out-of-order degree of stream data event time, the out-of-order degree of stream data representing the current moment is calculated by the local out-of-order degree algorithm. A dynamic watermark adjustment strategy is designed to adjust the watermark dynamically according to the degree of flow data disorder. Finally, the dynamic watermark adjustment strategy based on event time window is implemented in Apache Flink framework. Experimental results show that the dynamic watermark adjustment strategy based on event time window can effectively consider the accuracy and real-time performance of window operation under the condition of elastic or uncertain chaotic flow data. [ABSTRACT FROM AUTHOR]

A novel dual watermarking scheme with potential applications in identity protection, media integrity maintenance and copyright protection in both electronic and printed media is presented. The proposed watermarking scheme uses the owner's signature and fingerprint as watermarks through which the ownership and validity of the media can be proven and kept intact. To begin with, the proposed watermarking scheme is implemented on continuous-tone/greyscale images, and later extended to images achieved via multitoning, an advanced version of halftoning-based printing. The proposed watermark embedding is robust and imperceptible. Experimental simulations and evaluations of the proposed method show excellent results from both objective and subjective view-points. [ABSTRACT FROM AUTHOR]

Uploading an identity card as an image for the account verification process or transactions online can be a threat to application users. Identity card theft can be carried out by irresponsible persons if the application can be hacked. Therefore, protection of the image is required for authentication. In this study, the proposed technique is watermarking. A watermark in the form of a binary image will be embedded into the image as ownership using a Discrete Cosine Transform. The Discrete Cosine Transform works in the frequency domain. The location of the embedding of different watermarks was analysed in each 8×8 DCT block. The results of the analysis to assess the imperceptibility of original images and watermarked images using PSNR (Peak Signal to Noise Ratio) and SSIM (Structural Similarity Index Measure), while assessing the watermark robustness embedded using NCC (Normalized Cross Correlation). The results show PSNR (Peak Signal to Noise Ratio) = 54 dB with a watermark strength of 0,1 and an average SSIM (Structural Similarity Index Measure) = 0,9 on 4 scanned images in BMP format with a resolution of 100 DPI. A good watermark embedding is done on the green component at middle frequencies to maintain a balance between imperceptibility and robustness. In contrast, the red component at low frequency is vulnerable to attacks in the form of brightness +20 and contrast +50 with an average NCC (Normalized Cross Correlation) = 0,85. [ABSTRACT FROM AUTHOR]

with the rapid spread of the use of video files cross the world before and during the pandemic, and the availability of capabilities and tools to create, store and transmit video files of high quality. The latest studies illustrate that video files are the highest data types that had been transmitted over the internet, during video transmission or broadcast from one point to the other or over the internet, videos may be damaged for several reasons, such as packet loss or jitter, in this paper, a proposed approach of Ridgelet transformation is presented to improve received video file quality, based on embedded watermark quality present in video frames. It is implemented by extracting three-color channels of video frames, i.e., Red (R), Green (G), and Blue (B). A selected watermark is included in blue channel (B) along with transmitting the video file from source to destination. However, the quality of watermark is measured with execution regarding watermark. Peak Signal-to-Noise Ratio (PSNR) and Mean Square Error (MSE) were adopted as measurement criteria. The evaluation results show interesting comparative values without noise, in comparison to applying salt, pepper, and Gaussian noise to video frames.

According to the ever-growing supply and demand of IoT content, IoT big data in diversified applications are deemed a valuable asset by private and public sectors. Their privacy protection has been a hot research topic. Inspired by previous work on bounded-error-pruned IoT content market, we observe that the anonymity protection with robust watermarking can be developed by further pruning data for better resource-efficient IoT big data without violating the required quality of sensor service or quality of decision-making. In this paper, resource-efficient anonymity protection with watermarking is thus proposed for data consumers and owners of IoT big data market via blockchain. Our proposed scheme can provide the IoT data with privacy protections of both anonymity and ownership in IoT big data market with resource efficiency. The experiments of four different-type IoT datasets with different settings included bounded-errors, sub-stream sizes, watermark lengths, and ratios of data tampering. The performance results demonstrated that our proposed scheme can provide data owners and consumers with ownership and anonymity via watermarking the IoT big data streams for lossless compressibility. Meanwhile, the developed DApp with our proposed scheme on the Ethereum blockchain can help data owners freely share and trade with consumers in convenience with availability, reliability, and security without mutual trust. [ABSTRACT FROM AUTHOR]

Every day, a tremendous amount of image data is generated as a result of recent advances in imaging and computing technology. Several content-based image retrieval (CBIR) approaches have been introduced for searching image collections. These methods, however, involve greater computing and storage resources. Cloud servers can address this issue by offering a large amount of computational power at a low cost. However, cloud servers are not completely trustworthy, and data owners are concerned about the privacy of their personal information. In this research, we propose and implement a secure CBIR (SCBIR) strategy for searching and retrieving cipher text image databases. In the proposed scheme, the extract aggregated feature vectors to represent the related image collection and use a safe Asymmetric Scalar-Product-Preserving Encryption (ASPE) approach to encrypt these vectors while still allowing for similarity computation. To improve search time, all encrypted features are recursively clustered using the k-means method to create a tree index. The results reveal that SCBIR is faster at indexing and retrieving than earlier systems, with superior retrieval precision and scalability. In addition, our paper introduces the watermark to discover any illegal distributions of the images that are received by unlawful data users. Particularly, the cloud server integrates a unique watermark directly into the encrypted images before sending them to the data users. As a result, if an unapproved image copy is revealed, the watermark can be extracted and the unauthorized data users who spread the image can be identified. The performance of the proposed scheme is proved, while its performance is demonstrated through experimental results. [ABSTRACT FROM AUTHOR]

The techniques of data hiding have turned out to be one of the prominent factors to ensure security and confidentiality of the communication network adopting untrustworthy and insecure means to transfer delicate information. This paper proposes a novel watermarking scheme that has used Differential Evolution(DE) optimization algorithm to efficiently hide data. The key factors of any watermarking scheme are imperceptibility and robustness. The present work has tried to gain the relevant degree of optimization between these two disagreeable factors by using the optimization technique of DE. The novelty of this paper lies in: (i) the proposed method applies DE on the pixel intensities of host image to locate the cognitively insignificant regions, (ii) the scaling factor of DE is so chosen, that when the same mathematical value of scaling factor is applied to embed watermark, it can keep the trade-off between imperceptibility and robustness. The resultant covert regions are capable to uphold a high level of transparency and are robust enough to survive against attacks. The method is carried out in the spatial domain. Experimental output depicts that the proposed method maintains competent image quality. Nevertheless, the watermark can still be recognized after various attacks even if it is distorted by a significant amount. [ABSTRACT FROM AUTHOR]

This article presents a method for transparent watermarking of high-capacity watermarked video under H.265/HEVC (High-Efficiency Video Coding) compression conditions while maintaining high-quality encoded image. The aim of this paper is to present a method for watermark embedding using neural networks under conditions of subjecting video to lossy compression of the HEVC codec using the YUV420p color model chrominance channel for watermarking. This paper presents a method for training a deep neural network to embed a watermark when a compression channel is present. The discussed method is characterized by high accuracy of the video with an embedded watermark compared to the original. The PSNR (peak signal-to-noise ratio) values obtained are over 44 dB. The watermark capacity is 96 bits for an image with a resolution of 128 × 128. The method enables the complete recovery of a watermark from a single video frame compressed by the HEVC codec within the range of compression values defined by the CRF (constant rate factor) up to 22. [ABSTRACT FROM AUTHOR]

Mobile devices have been increasingly used to take pictures without leaving a trace. However, the application system can lead to confidential information leaks. A framework for screen-shooting-resilient watermarking via deep networks (SSDeN) in the frequency domain is put forward in this study to solve this problem. The proposed framework can extract the watermark from the leaked photo for copyright protection. SSDeN is an end-to-end process that combines convolutional neural network (CNN) with residual block to embed and extract watermarks in the DCT domain. We simulate some screen-shooting attacks to ensure the networks embed the watermark robustly. Our framework achieves the state-of-the-art performance on existing learning architectures for screen-shooting-resilient watermarking. [ABSTRACT FROM AUTHOR]

A new robust video watermarking method is presented. Its main idea consists in adding a temporal sinusoidal sequence with its individual phase to each pixel of the video signal. The two-dimensional field of these phases corresponds to the image of the embedded watermark. Simple and fast algorithms for embedding and extracting watermarks are described. The results of experimental studies demonstrate a high quality of watermark extraction at their visual indistinguishability, robustness to some attacks, including temporal desynchronization, and a high visual quality of the protected video. [ABSTRACT FROM AUTHOR]

Research on the feature of speech and image signals are carried out from two perspectives, the time domain and the frequency domain. The speech and image signals are a non-stationary signal, so FT is not used for the non-stationary characteristics of the signal. When short-term stable speech is obtained by windowing and framing the subsequent processing of the signal is completed by the Discrete Fourier Transform (DFT). The Fast Discrete Fourier Transform is a commonly used analysis method for speech and image signal processing in frequency domain. It has the problem of adjusting window size to a for desired resolution. But the Fractional Fourier Transform can have both time domain and frequency domain processing capabilities. This paper performs global processing speech encryption by combining speech with image of Fractional Fourier Transform. The speech signal is embedded watermark image that is processed by fractional transformation, and the embedded watermark has the effect of rotation and superposition, which improves the security of the speech. The paper results show that the proposed speech encryption method has a higher security level by Fractional Fourier Transform. The technology is easy to extend to practical applications. [ABSTRACT FROM AUTHOR]

Currently, many digital data transmitted over the Internet are often attacked by intruders. This leads to information leakage and creates serious problems in the field of copyright protection, property rights protection, authentication, etc. In recent years, the technology of digital watermarks for application in content protection problems has attracted great attention from users and researchers. A particularly demanding area of digital marking is the marking of documents, which are very sensitive to any changes of text. This article reviews the current trends in watermarking and watermarking technologies on digital documents to identify state-of-the-art techniques and their limitations. Also, a general architecture of the algorithm for applying and extracting reliable and imperceptible watermarks into a document, based on changing text glyphs, is being developed to solve the problem of tracking the source of information leakage. Using this algorithm, we can extract watermark information from document screenshots. Compared to previous algorithms for watermarking documents, the proposed scheme guarantees content-independent embedding, as well as the invisibility of the digital mark. In addition, the proposed marking scheme shows a high extraction accuracy.

Steganography is a technique that embeds secret information in a suitable cover file such as text, image, audio, and video in such a manner that secret information remains invisible to the outside world. The study of the literature relevant to video steganography reveals that a tradeoff exists in attaining the acceptable values of various evaluation parameters such as a higher capacity usually results in lesser robustness or imperceptibility. In this article, we propose a technique that achieves high capacity along with required robustness. The embedding capacity is increased using singular value decomposition compression. To achieve the desired robustness, we constrain the embedding of the secret message in the region of interest in the cover video file. In this manner, we also succeed in maintaining the required imperceptibility. We prefer Haar-based lifting scheme in the wavelet domain for embedding the information because of its intrinsic benefits. We have implemented our suggested technique using MATLAB. The analysis of results on the prespecified parameters of the steganography justifies the effectiveness of the proposed technique.