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王朔中 《上海大学学报(英文版)》2002,6(2):149-153
Different digital watermarking techniques and their applications are briefly reviewed.Solution to a practical problem with visible image marking is presented,together with experimental results and discussion.Main focusis on reduction of error caused by the mark addition and subtraction.Image classification based on its mean gray level and adjustment of out-of-range gray levels are implemented. 相似文献
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1 Introduction Imagefeatureextractionisoneofthebasiccon cernsinimage processingandanalysis .Inordertodealwiththese problemsmanyefficienttechniqueshavebeendeveloped ,rangingfromconventional(RobertsandSobeloperators ,histogrammodificationandadaptivethreshol… 相似文献
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