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An anti-geometric attack SVD digital watermark algorithm based on geometric center and image mass centroid is proposed. An improved block-based SVD is employed to embed and extract watermark. Based on the invariance of geometric center and image mass centroid, the conducted geometric transform can be detected, and the attacked image is corrected before(More)
BACKGROUND Helicobacter pylori (H. pylori) is a well-recognized gastroduodenal pathogen and class I carcinogen. Dual oxidase-2 (DUOX2), a member of NADPH oxidase family, has several critical physiological functions, including thyroid hormone biosynthesis and host mucosal defense. AIM To investigate the effect of H. pylori infection on DUOX2 gene(More)
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