Statistical feature-based steganalysis for pixel-value differencing steganography

Pixel-value differencing (PVD) steganography is a popular spatial domain technology. Several PVD-based studies have proposed extended PVD steganography methods. The majority of these studies have verified their security against the regular-singular (RS) analysis. However, RS analysis is aimed at the feature of the least significant bit substitution method, which is relatively less significant for PVD steganography. The pixel difference histogram (PDH) is generally utilized to attack PVD steganography. If the embedding capacity is high, then the features on the PDH are evident; otherwise, the features are less obvious. In this paper, we propose a statistical feature-based steganalysis technique for the original PVD steganography. Experimental results demonstrate that, compared with existing steganalysis technique with weighted stego-image (WS) method, the proposed method effectively detects PVD steganography at low embedding ratios, such that there is no need of using the original embedding parameters. Furthermore, the accuracy and precision of the method are better than those of existing PVD steganalysis techniques. Therefore, the proposed method contributes to the security analysis of the original PVD steganography as an alternative to the commonly used RS, PDH and WS attack techniques.

Statistical Feature–Based Steganalysis for Pixel-Value Differencing Steganography

The security and embedding capacity of pixel-value differencing (PVD) steganography is superior to that of least significant bit replacement steganography. Several studies have proposed extended PVD steganography methods that use the original concept of PVD steganography. The majority of the studies have verified their security against regular-singular detection analysis or pixel difference histogram attacks. Weighted stego image steganalysis is the state-of-the-art technology for PVD steganography. This study proposed a suitable parameter for the estimator based on different relative embedding ratios and the size of normal embedding blocks. The experimental results revealed that the proposed technology does not require advance knowledge of the original image. In addition, the proposed method is accurate and precise at any embedding ratio. In the future, this method may be utilized to analyze the security of extended PVD steganography.

Pulse deinterleaving based on fusing PDWs and PRI extraction process for radar-assisted edge devices considering computational costs

Deinterleaving or radar pulse separation is a very important goal in terms of radar sources for identifying and implementing electronic warfare systems. In order to separate radar pulses, parameters measured by electronic warfare receivers such as electronic warfare support measures (ESM) and electronic signals intelligence (ELINT) are used in pulse separation. This paper presents a multi-parameter improved method for separating the pulse sequence of radar signals based on time of arrival (TOA) processing with sorting the other pulse descriptor words (PDW) parameters. In the proposed method, after extracting all the pulse repetition intervals (PRIs) based on TOA, the parameters of the angle of arrival, pulse width and carrier frequency (RF) are being used in pulse sorting to separate the received interleaved pulse sequences. The sequential difference histogram (SDIF) algorithm or cumulative difference histogram (CDIF) algorithm is used to extract all pulse repetition intervals. Also, in order to separate the sequence of the received pulses from all surroundings emitters, in addition to matching the potential PRI among the TOAs of the pulses and the similarity measurement in the other parameters of the pulse sequence (pulse sorting) have been used. This proposed algorithm is implemented in the integrated and complete design for deinterleaving of the radar pulses. The proposed method by considering low-cost computing sources considers a fast and low-complexity solution that can be used for edge-enabled distributed processors in aerial radar platforms as edge devices for military/combat unmanned aerial vehicles or networked missiles. The simulation results show that our method is completely effective.

A Novel Approach for Detection of Moving Objects in Complex Scenes Using Fuzzy Colour Difference Histogram

Background subtraction schematic is widely used for motion detection. For effective automation of this process, a robust algorithm with high accuracy is needed. One of the major challenges of such algorithms is the identification of objects from an environment with composite elements that may be a dynamic background, frames with a camouflaged background and foreground pixels, and consecutive frames with varying illumination. The existing system uses a multi-color space histogram superposition principle having the biggest challenge of choosing appropriate color components in suitable proportion. Overcoming this challenge, a novel approach, MODITBS, processed in a differential domain, is proposed. A fuzzified color difference histogram-based background modeling is done to significantly deal with complex background scenes followed by principal component analysis-based feature extraction. The foreground objects detected are enhanced using a Kalman filter. The results show that MODITBS attains an accuracy of 95.16% in comparison to the existing system having an accuracy of 91.25%.

Pengenalan Batik Indonesia Menggunakan Ciri Warna dan Tekstur

<p>Upaya pelestarian budaya bangsa melalui pengenalan batik merupakan hal yang harus selalu ditingkatkan. Terlebih dengan diakuinya budaya batik Indonesia oleh UNESCO sebagai bagian dari warisan budaya tak berwujud (<em>intangible)</em>. Hal inilah yang mendasari dilakukannya sejumlah penelitian terkait pengenalan batik. Hasil kinerja yang sangat baik telah dicapai oleh berbagai sistem pengenalan batik. Namun, berbagai penelitian yang dilakukan tersebut masih terbatas pada jumlah motif batik yang sedikit. Oleh karena itu, pada penelitian ini dibangun sistem pengenalan batik dengan menggunakan 114 motif batik dari 14 daerah di propinsi Jawa Barat. Ciri gabungan dibangun dengan mengkombinasikan ciri tekstur dan warna. Ciri tekstur didapatkan dari <em>Gray Level Co-occurrence Matrix</em> (GLCM) sedangkan ciri warna didapatkan dari <em>Color Difference Histogram</em> (CDH). Penulis juga menambahkan variasi dalam dataset yang berupa <em>rotate</em> dan <em>f</em><em>lip</em> untuk memperbesar variasi <em>intra-class</em>. Hasil utama dari kinerja sistem yang dibuat adalah akurasi sebesar 99,128 % dan <em>F1-Score</em> sebesar 98,9999% pada pengenalan batik berdasarkan daerah, sedangkan pada pengenalan batik berdasarkan motif didapatkan akurasi sebesar 98,2456% dan <em>F1-Score</em> sebesar 98,3208%. </p>