29 January 2007 Compression of color images using a hologram of gray tones
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A strategy for to compress color images in digital holograms of gray tones was developed. The procedure codifies the information of each channel of the RGB model in a system of fringes, it is a gray image denominated "hologram". The fringes in their intensity of gray tone carry the signal of the channel, in this manner the amplitude information for each channel of color image is stored. The angles of fringes define how the information of each channel will be packaged. The sum of the different gray fringes images is the hologram, it is the "object" for a digital holographic system. The RGB channels are high intensity peaks of information in the hologram's Fourier space, and when the peaks are filtered each channel can be extracted. Parameters such as: space frequency, visibility, direction and quality of the fringes affect the quality of the reconstructed image. However, the propose methodology allow a radius 3:1 for the compression of color image, too with this process is possible the compression of different spectrum in a one color image.
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Alejandro Restrepo-Martínez, Roman Castañeda, "Compression of color images using a hologram of gray tones", Proc. SPIE 6493, Color Imaging XII: Processing, Hardcopy, and Applications, 64931I (29 January 2007); doi: 10.1117/12.703612; https://doi.org/10.1117/12.703612

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