Results 181 to 190 of about 1,535 (206)

Spectrum-estimation based lossless information recovery for sparse array patterns

Telecommunication Systems, 2010
One of the open problems in lossless information hiding research is how to get adaptively better difference image architectures for given applications. In this paper we propose a simple and efficient approach to predict high-similar interpolation image from its sparse pattern and spectral expansion. After difference operator, peak value of the spike is
Guorui Feng, Zhenxing Qian, Xinpeng Zhang 0001   +2 more
openaire   +1 more source

Visual secret sharing based on random grids with abilities of AND and XOR lossless recovery

Multimedia Tools and Applications, 2013
In this paper, a visual secret image sharing threshold scheme based on random grids and Boolean operations with the abilities of AND and XOR decryptions is proposed. When no light-weight computation device the secret could be revealed by human visual system with no cryptographic computation based on Boolean AND operation (stacking).
Xuehu Yan, Shen Wang 0004, Ahmed A. Abd El-Latif 0001, Xiamu Niu   +3 more
openaire   +1 more source

Image secret sharing method with two-decoding-options: Lossless recovery and previewing capability

Image and Vision Computing, 2010
Visual cryptography scheme (VCS) is a research area in image secret sharing, where one can easily stack shadow images and decode a black-and-white secret image through the human visual system without computation. Although VCS does not provide a competitive reconstruction quality, its stacking-to-see property clearly has the intended applications.
Ching-Nung Yang, Chuei-Bang Ciou
openaire   +1 more source

JPEG2000 ROI coding method with perfect fine-grain accuracy and lossless recovery

2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers, 2009
Medical images have high spatial and high bit-depth resolution (12 bits per sample or more). These high resolutions allow computer-aided diagnosis, which are exploited by radiologists to identify relevant medical areas, known as Regions of Interest (ROI). In image compression, ROI coding allows to recover the ROI earlier than the rest of the image.
Joan Bartrina-Rapesta, Joan Serra-Sagrista, Francesc Auli-Llinas, Juan Munoz Gomez   +3 more
openaire   +1 more source

Lossless snubber circuits for current doubler rectifiers to reduce reverse-recovery losses

IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468), 2004
Current doubler rectifier (CDR) is one of the best candidates for high output current DC-DC converters. In this paper, several conventional CDR snubber circuits are evaluated, and two passive lossless snubber circuits for the CDR are proposed to reduce the reverse-recovery-related losses and clamp the voltage spikes across the rectifiers.
null Hong Mao, J.A. Abu-Qahouq, null Weihong Qiu, null Yangyang Wen, I. Batarseh   +4 more
openaire   +1 more source

Secret image sharing using (t,n) threshold scheme with lossless recovery

2012 5th International Congress on Image and Signal Processing, 2012
Secret image sharing is a means of hiding an image within another image to generate similar images. In 1979, Shamir proposed a method of secret image sharing known as the (t, n) threshold scheme. (t, n) threshold schemes can generate n shadow images and any t of n shadow images can be used to reconstruct the secret image and cover image.
Ming-Chun Chien, Jen-Ing G. Hwang
openaire   +1 more source

Passive lossless turn-on snubber energy recovery in high frequency power converters

Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics, 2002
This paper describes three passive lossless circuits for recovering turn-on snubber energy, which are applicable to high frequency power converters. The inductive trapped energy, which is load current dependent, is recovered into the DC supply, load or both, at switch turn-off.
X. He, B.W. Williams, S.J. Finney, T.C. Green   +3 more
openaire   +1 more source

Interactive Encoding and Decoding for One Way Learning: Near Lossless Recovery With Side Information at the Decoder

IEEE Transactions on Information Theory, 2010
A source coding paradigm called interactive encoding and decoding (IED) is considered for a source network where a finite alphabet source X is to be encoded, and another finite alphabet source Y correlated with X is available only to the decoder as a helper.
En-Hui Yang, Da-ke He
openaire   +1 more source

Cropping Resilient Secret Image Sharing Scheme with Lossless Recovery

2023 IEEE 22nd International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom), 2023
Shengyang Luo, Yaqi Liu, Xuehu Yan, Chao Huang   +3 more
openaire   +1 more source

Lossless hidden data recovery using bit depth data embedding- a new concept

2009 International Conference on Emerging Trends in Electronic and Photonic Devices & Systems, 2009
This paper presents a new concept of exploiting bit depth data embedding using second level biorthogonal wavelet horizontal coefficients of a JPEG2000 compressed greyscale image as cover media. Based on the performance comparisons of the potential wavelets and discrete wavelet transform (DWT) based data hiding techniques it is expected that the bit ...
Rajeev Nayan Tripathi, Anand Mohan, S P Singh   +2 more
openaire   +1 more source