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This paper presents a robust algorithm for digital image watermarking based on Singular Value Decomposition (SVD) and Dither Quantization. The eigen matrix in the singular value decomposition is explored for data embedding. The perceptibility of the watermarked image is enhanced by embedding the watermark image in some selected and most complex blocks of(More)
In this paper, the performance of SVD and Schur decomposition is evaluated and compared for image copyright protection applications. The watermark image is embedded in the cover image by using Quantization Index Modulus Modulation (QIMM) and Quantization Index Modulation (QIM). Watermark image is embedded in the D matrix of Schur decomposition and Singular(More)
Zusammenfassung. Statistische Eigenschaften nat urlicher Grauwerttexturen werden mit Co{Occurrence Matrizen, basierend auf der Grauwertstatistik zweiter Ordnung, modelliert. Die Matrix gibt dann die a{ priori Wahrscheinlichkeiten aller Grauwertpaare an. Da in der medizinischen Bildverarbeitung verstarkt Multispektralbilder ausgewertet werden, wird das(More)
Extremely hard materials can be easily machined by Electrical Discharge Machining process due to its thermal erosion nature. In this process, the amount of material removed is directly proportional to the discharge current. Due to the stochastic nature of the thermal erosion process, the discharge current is varied for every applied electrical pulse. It(More)
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