This paper presents a 12-bit 150-MHz current steering DAC with hierarchical symmetrical switching sequence that compensates gradient errors. The circuit of the DAC employs segmented architecture; the least significant bits (LSBs) steer a binary weighted array, while the most significant bits (MSBs) are thermometer decoded and steer a unary array. The measured differential nonlinearity and integ...

Abstract An active matrix organic light emitting diode (AMOLED) pixel structure is proposed to improve image quality of high resolution small sized displays. The proposed pixel structure increases luminance uniformity by decreasing the distortion of the voltage in the storage capacitors using negative feedback structure. The simulation results show that the distortion of the voltage in the stor...

In the paper, we advocate a new approach to blind steganalysis based on classifying higher-order statistical features derived from an estimation of the stego signal in the wavelet domain. The proposed approach is flexible and enables reliable detection of presence of stego messages embedded using a wide range of steganographic methods that include ±1 embedding (LSB matching), LSB embedding, Sto...

This paper introduces a new, principled approach to detecting LSB steganography in digital signals such as images and audio. It is shown that the length of hidden message embedded in the least significant bits of signal samples can be estimated with relatively high precision. The new steganalytic approach is based on some statistical measures of sample pairs that are highly sensitive to LSB emb...

A scheme is proposed for representing 2’s-complement binary numbers in which there are two least-significant bits (LSBs). Benefits of the extra LSB include making the number representation range symmetric (i.e. from 22 to 2 for k-bit integers), allowing sign change by simple bitwise logical inversion, facilitating multiprecision arithmetic and enabling the truncation of results in lieu of round...

In this paper we have described a steganalytic tool to detect the presence of hidden message in LSB steganography. It is a stego -only attack in LSB insertion for uncompressed color images encoded in 24 bit BMP format. The detection theory is based on statistical analysis of pixel pairs using their RGB components. The necessity of a variable threshold to mark the stego images is explained .The ...

In this paper, we present a novel method to embedding secret message in the cover-image. The basic concept of the proposed method is by simple Least Significant Bit (LSB) substitution. We propose a steganography method that applies a technique to embedding a wavelet compressed secret message within the Least Significant Bit (LSB) of the cover image pixels in a specific pattern. The proposed met...

BACKGROUND AND OBJECTIVE Calciphylaxis is a painful complication of end-stage renal disease and secondary hyperparathyroidism. Calcification most commonly affects skin and soft tissue of the lower extremities resulting in excruciatingly painful skin ulcers. Treatment involves correction of hypercalcemia and hyperphosphatemia, parathyroidectomy, and supportive measures. METHODS The literature ...

The information-hiding ratio is a well-known metric for evaluating steganalysis performance. In this paper, we introduce a new metric of image complexity to enhance the evaluation of steganalysis performance. In addition, we also present a scheme of steganalysis of least significant bit (LSB) matching steganography, based on feature mining and pattern recognition techniques. Compared to other w...