According to the theory of light diffraction and that of moireimage encoding, a new technology of double image encoding using non key phase only moire method is presented in this paper.
根据光的衍射原理和莫尔图像编码原理，实现了无钥匙位相型双图像莫尔编码技术。
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Halftone image areas in the original books cause the most reproduction problems, as there is the potential that moire patterns may form when these image areas are re-screened.
The principle of imagemoire, the calculation method and testing method of the contour line are discussed, and some application examples in medicine are given.