Still-image watermarking robust to local geometric distortions.

Geometrical distortions are the Achilles heel for many watermarking schemes. Most countermeasures proposed in the literature only address the problem of global affine transforms (e.g.

Applying informed coding and embedding to design a robust high-capacity watermark.

We describe a new watermarking system based on the principles of informed coding and informed embedding. This system is capable of embedding 1380 bits of information in images with dimensions 240 x 368 pixels. Experiments on 2000 images indicate the watermarks are robust to significant valumetric distortions, including additive noise, low-pass filtering, changes in contrast, and lossy compression.

Effects of abciximab and tirofiban on vitronectin receptors in human endothelial and smooth muscle cells.

human umbilical venous endothelial cells. 7E3 binding correlated with alphavbeta3-expression in all cell types. Integrin-mediated cell functions were analysed with adhesion and spreading assays on vitronectin.

Angiotensin II and PDGF-BB stimulate beta(1)-integrin-mediated adhesion and spreading in human VSMCs.

beta(1)-Integrins play an important role for adhesion and spreading of human smooth muscle cells. In the present study we examined the influence of angiotensin II and platelet-derived growth factor (PDGF)-BB on beta(1)-integrin-dependent functions of human smooth muscle cells obtained from iliac arteries. Treatment of these cells with PDGF-BB (20 ng/mL) and Angiotensin II (1 micromol/L) did not change beta(1)-integrin expression up to 48 hours as analyzed by flow cytometry and reverse transcription polymerase chain reaction.