Chaotic systems produce pseudo-random sequences with good randomness; therefore, these systems are suitable to efficient image encryption. In this paper, a low complexity image encryption based on Nested Piece Wise Linear Chaotic Map (NPWLCM) is proposed. Bit planes of the grey or color levels are shuffled to increase the encryption complexity. A security analysis of the proposed system is perf...

This paper proposes a new video coding system which transmits functionally layered data for “awareness” communication. The system can display “awareness”, which is defined as a “blurred” and “semi-transparent” person region, by transmitting minimum data necessary for displaying the awareness. The minimum data contains (1) person region (foreground) and (2) lower frequency band signals of the re...

This paper draws together two methodologies for the detection of bit replacement steganography: the principle of maximum likelihood, which is statistically well-founded but has lead to weak detectors in practice, and so-called structural detection, which is sensitive but lacks optimality and can suffer from complicated exposition. The key novelty is to extend structural analysis to include a hy...

125 AbstractSpiht-Set Partitioning in Hierarchical Trees algorithm is widely used as a compression and encoding algorithm for satellite image compression and transmission. Though it provides efficient lossless compression with high PSNR the associated complexity of algorithm is very high which makes it unfeasible for many practical hardware implementations. Based on the SPIHT algorithms, we def...

This paper presents a new image indexing and retrieval algorithm by integrating color (HSV color histogram) and texture (directional binary wavelet patterns (DBWP)) features. For color feature, first the RGB image is converted to HSV image, and then histograms are constructed from HSV spaces. For texture feature, an 8-bit grayscale image is divided into eight binary bit-planes, and then binary ...

A 20-plane wire chamber spectrometer utilizing capacitors as memory elements and suitable for operation in a magnetic field is described. The (parallel) wire planes are separated by N 1 cm. The active areas of the chambers range in size from 120 X I20 cm2 t0 200 x 240 cm2, The wire separation is 1 mm. Each readout wire is connected to a separate capacitor resulting in a 30 K-bit memory for the ...

Fast and efficient image compression can be achieved with the progressive wavelet coder (PWC) introduced in this paper. Unlike many previous wavelet coders, PWC does not rely on zerotrees or other ordering schemes based on parent-child wavelet relationships. PWC has a very simple structure, based on two key concepts: (1) data-independent reordering and blocking, and (2) lowcomplexity independen...

the main task of drilling the formation by the bit is done via scraping, crushing and grinding. discharging the fluid from the bit nozzles is done with high pressure which assists to break the rocks. different parameters affect the bit selection and design for each drilling formation, but the most important one is drillability that depends on hardness of the formation. in this paper, the design...

We present a method that extends lossless compression with the feature of finegranularity scalable near-lossless compression while preserving the high compression efficiency and low complexity exhibited by dedicated lossless compression methods when compared to the scalable compression methods developed for lossy image compression. The method operates by splitting the image pixel values into th...