A wavelength-multiplexing ghost-imaging (WMGI) technique is performed in order to improve long data acquisition time in conventional ghost imaging. In WMGI, a source has more than two colored light beams which are independently modulated and projected onto an object at the same time. Then the reflected light from the object is recorded with wavelength-selected detectors. We analyze the contrast-to-noise ratio (CNR) of the reconstructed images of each single-wavelength ghost imaging and their superposition and demonstrate the validity of the WMGI technique.
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Zhang et al. (2015) studied this question.
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