79 research outputs found
Performance improvement of JPEG2000 steganography using QIM
This paper presents a modified QIM-JPEG2000 steganography which improves the previous JPEG2000 steganography using quantization index modulation (QIM). Since after-embedding changes on file size and PSNR by the modified QIM-JPEG2000 are smaller than those by the previous QIM-JPEG2000, the modified QIM-JPEG2000 should be more secure than the previous QIM-JPEG2000.4th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2008), 15-17, August, 2008, Harbin, Chin
Lossless data hiding using bit-depth embedding for JPEG2000 compressed bit-stream
We have proposed a reversible information hiding for binary images. In this paper, we presents a lossless data hiding method for JPEG2000 compressed data based on the reversible information hiding. In JPEG2000 compression, wavelet coefficients of an image are quantized,therefore, the least significant bit plane (LSB) can be extracted. The proposed method recovers the quantized wavelet coefficients of cover images from stego images. To realize this, we embed not only secret data and the JBIG2 bit-stream of a part of the LSB plane but also the bit-depth of the quantized coefficients on some code-blocks.Experimental results demonstrate the feasibility of application of the proposed method to image alteration detection for JPEG2000 compressed data.2008 International Conference on Intelligent Information Hiding and Multimedia Signal Processing, 15-17 Aug. 2008, Harbin, Chin
Improvement of JPEG compression efficiency using information hiding and image restoration
The application of information hiding to image compression is investigated to improve compression efficiency for JPEG color images. In the proposed method, entropy-coded DCT coefficients of chrominance components are embedded into DCT coefficients of the luminance component. To recover an image in the face of the degradation caused by compression and embedding, an image restoration method is also applied. Experiments show that the use of both information hiding and image restoration is most effective to improve compression efficiency
Development of a high-resolution fast gamma-ray imager for the new-generation PETII
 A lot of effort has been spent again this year for the development of the new readout system of scintillator crystals using wave-length shifter. The main part of the progress we accomplished is reported here
Export price, demand disturbances, and market structure
Summary in GermanSIGLEAvailable from Bibliothek des Instituts fuer Weltwirtschaft, ZBW, Duesternbrook Weg 120, D-24105 Kiel / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Market structure, capacity expansion, and pricing a model applied to the Japanese iron and steel industry
UuStB Koeln(38)-861100146 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
Export pricing behavior and market structure
Summary in GermanSIGLEAvailable from Bibliothek des Instituts fuer Weltwirtschaft, ZBW, Duesternbrook Weg 120, D-24105 Kiel / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Japanese multinationals in US and European manufacturing industries: entry, strategy and patterns
Summary in GermanSIGLEAvailable from Bibliothek des Instituts fuer Weltwirtschaft, ZBW, Duesternbrook Weg 120, D-24105 Kiel W 179 (92.13) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
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