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. 2017 May 19;8:15391. doi: 10.1038/ncomms15391

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) Incident image consisting of the ZJU eagle logo and letters with amplitude modulation, where the inside and the outside of the letters and the eagle have different intensities. (b) Reflected intensity image corresponding to a. (c) Incident image consisting of the Stanford tree logo and letters generated with phase modulation, where the inside and the outside of the letters and the logo have different phases but the same intensity. (d) Reflected intensity image corresponding to c. The white bars correspond to the length of 100 μm.