Vivek Singh Verma

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In this paper, a blind watermarking scheme based on significant difference of lifting wavelet transform coefficients has been proposed. The difference between two maximum coefficients in a block is called as significant difference. Embedding of binary watermark has been done based on the largest coefficient of randomly shuffled blocks of CH3 sub-band. This(More)
Four chemicals--gibberellic acid, indoleacetic acid, 2,4-6 and thiouracil were tested for their inhibitory effect against a virus disease of Vigna sinensis (cowpea). All the four chemicals inhibited the virus to a considerable extent in in vitro studies. Pre and post-inoculation treatments were equally effective in inhibiting the virus, viz. local lesion(More)