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Quercus dentata Thunb., a dominant forest tree species in northern China, has significant ecological and ornamental value due to its adaptability and beautiful autumn coloration, with color changes from green to yellow into red resulting from the autumnal shifts in leaf pigmentation. However, the key genes and molecular regulatory mechanisms for leaf color transition remain to be investigated.
First,...
A scheme of embedding gray-scale watermark image into an RGB carrier image based on the fast Quaternion Fourier Transform (QFT) is proposed. In this algorithm, the R, G, B color components are represented respectively by the three imaginary parts of a pure imaginary quaternion. Then the gray-scale watermark image is inserted into the real part of the carrier image which is transformed by the 2D-QFT...
To improve PSNR performance of alternating-projection demosaicing algorithm, the estimated initialization of alternating-projection algorithm that based on pre-estimating the minimum square error is meliorated in this paper. The improved algorithm is compared with other typical demosaicing approaches by testing the twenty-four Kodak set (6) images. The PSNR of the improved algorithm is better than...
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