Color representation method using RGB color binary-weighted computer-generated holograms

Masato Fujiwara; Naoki Takada; Hiromitsu Araki; Shohei Ikawa; Yuki Maeda; Hiroaki Niwase; Minoru Oikawa; Takashi Kakue; Tomoyoshi Shimobaba; Tomoyoshi Ito

doi:10.3788/COL201816.080901

Chinese Optics Letters, Volume. 16, Issue 8, 080901(2018)

Color representation method using RGB color binary-weighted computer-generated holograms Editors' Pick

Masato Fujiwara¹, Naoki Takada^2、*, Hiromitsu Araki¹, Shohei Ikawa³, Yuki Maeda¹, Hiroaki Niwase¹, Minoru Oikawa², Takashi Kakue⁴, Tomoyoshi Shimobaba⁴, and Tomoyoshi Ito⁴

Author Affiliations

¹Graduate School of Integrated Arts and Sciences, Kochi University, Kochi 780-8520, Japan

²Science Department, Natural Sciences Cluster, Research and Education Faculty, Kochi University, Kochi 780-8520, Japan

³Faculty of Science, Kochi University, Kochi 780-8520, Japan

⁴Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan

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Figures & Tables(10)

Fig. 1. (a) Conventional binary CGH and (b) BW-CGH for green reference light.

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Fig. 2. Light intensities of the reconstructed object points from BW-CGHs shown in green with various gradation levels.

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Fig. 3. Assignment of the object points of the 3D object to the bit planes comprising BW-CGHs with different gradation levels.

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Fig. 4. Color reconstructed object point from RGB bit planes comprising BW-CGHs with different gradation levels.

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Fig. 5. Optical setup for color electroholography using RGB multiple bit planes comprising BW-CGHs.

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Fig. 6. RGB-colored bit plane BRGBm synthesized from RGB bit planes BRm, BGm, BBm.

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Fig. 7. Multicolored reconstructed real images using the proposed method. (a) The white 3D objects “Stanford bunny” with gradation. (b) The reconstructed real image from the white 3D objects “Stanford bunny.” (b)–(n) The multicolored reconstructed image.

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Fig. 8. Assignment of the object points of the seven-color 3D model to RGB multiple bit planes.

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Fig. 9. Reconstructed real image of the seven-color 3D model.

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Table 1. Gradation Values of the Colored Area of BW-CGHs of Multiple Bit Planes

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Table 1. Gradation Values of the Colored Area of BW-CGHs of Multiple Bit Planes

	Gradation Values of Bit Planes
	Red Bit Plane			Green Bit Plane			Blue Bit Plane
Figure	$B_{R}^{0}$	$B_{R}^{1}$	$B_{R}^{2}$	$B_{G}^{0}$	$B_{G}^{1}$	$B_{G}^{2}$	$B_{B}^{0}$	$B_{B}^{1}$	$B_{B}^{2}$
Fig. 7(b)	125	150	240	135	165	255	135	165	255
Fig. 7(c)	135	165	255	0	0	0	0	0	0
Fig. 7(d)	0	0	0	135	165	255	0	0	0
Fig. 7(e)	0	0	0	0	0	0	135	165	255
Fig. 7(f)	0	0	0	135	165	255	80	115	180
Fig. 7(g)	0	0	0	135	165	255	135	165	255
Fig. 7(h)	0	0	0	85	120	170	135	165	255
Fig. 7(i)	135	165	255	0	0	0	90	120	170
Fig. 7(j)	135	165	255	0	0	0	135	165	255
Fig. 7(k)	75	110	160	0	0	0	135	165	255
Fig. 7(l)	135	165	255	85	120	170	0	0	0
Fig. 7(m)	135	165	255	120	150	240	0	0	0
Fig. 7(n)	105	140	200	135	165	255	0	0	0

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Masato Fujiwara, Naoki Takada, Hiromitsu Araki, Shohei Ikawa, Yuki Maeda, Hiroaki Niwase, Minoru Oikawa, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito, "Color representation method using RGB color binary-weighted computer-generated holograms," Chin. Opt. Lett. 16, 080901 (2018)

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Paper Information

Category: Holography

Received: Apr. 2, 2018

Accepted: Jun. 25, 2018

Published Online: Aug. 2, 2018

The Author Email: Naoki Takada (ntakada@is.kochi-u.ac.jp)

DOI:10.3788/COL201816.080901

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laser devices and laser physics

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