Fast image enhancement method for display images in ambient light

Cheng Yang; Jianqi Zhang; Wenjing Chang

doi:10.1364/JOSAA.33.000228

Journal of the Optical Society of America A
Vol. 33,
Issue 2,
pp. 228-236
(2016)
•https://doi.org/10.1364/JOSAA.33.000228

Fast image enhancement method for display images in ambient light

Cheng Yang, Jianqi Zhang, and Wenjing Chang

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Cheng Yang, Jianqi Zhang, and Wenjing Chang, "Fast image enhancement method for display images in ambient light," J. Opt. Soc. Am. A 33, 228-236 (2016)

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Abstract

Display images under high illumination may appear to have lower lightness and attenuated contrast. In this paper, we review the image degradation phenomenon in ambient light through photoreceptor physiology. The influence of different environmental parameters and their effects on various gray areas in images can be evaluated by the cone response difference. Based on this, we propose a fast global tone mapping method to minimize the cone response difference at different pixel intensity levels of images displayed at different illumination levels. This method has a superior computational efficiency and higher evaluation score than existing algorithms.

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Ambient Light Setting	Setting1	Setting2
Display maximum luminance ( $cd / m^{2}$ )	120	120
Display black lever ( $cd / m^{2}$ )	0.5	0.5
Diffuse reflected luminance ( $cd / m^{2}$ )	12	24
Ambient luminance ( $cd / m^{2}$ )	200	1100

	Methods
	Original		Monobe’s		Mantiuk’s		Kim’s		Proposed
	Z-Score
Images	Setting1	Setting2	Setting1	Setting2	Setting1	Setting2	Setting1	Setting2	Setting1	Setting2
bikes	−6.47	−6	0	−3.81	2.62	3.3	−1.47	−0.47	5.32	6.98
building2	−5.32	0	4.64	−0.83	0.68	1.15	−2.98	−2.47	2.98	2.15
buildings	−1.47	−5.17	0.79	−0.72	0.64	−0.64	−0.64	4.53	0.68	2
caps	−1.68	−1	1	0	−1.68	−0.72	−0.36	1.36	2.72	0.36
carnivaldolls	4.28	0.68	0.15	−0.36	−1.15	0	−9.28	−2	6	1.68
cemetry	−2.83	−2.11	−1.36	−0.72	3.66	2.98	1.36	0.68	−0.83	−0.83
churchandcapitol	−1	1.36	−1.32	−0.32	0	1.04	0.96	−2.72	1.36	0.64
coinsinfountain	−3.19	−3.3	1.19	0.47	2	−0.11	−1	−0.72	1	3.66
dancers	0.79	2.47	1.51	0.83	0	1.45	−4.13	−6.94	1.83	2.19
flowersonih35	1.98	1.15	4.17	0.68	−4.17	−1.72	−6.94	−5.28	4.96	5.17
house	−0.32	1	−2.15	−0.68	0.32	−0.32	0.68	−0.32	1.47	0.32
lighthouse2	−3.19	−3.77	0	−0.17	−3.02	0.83	0.68	0.64	5.53	2.47
lighthouse	−2.62	−2.47	−1.68	−1.04	1.32	1.15	1.83	0.32	1.15	2.04
manfishing	6.66	4.64	3.96	−1.83	−2.3	0	−13.96	−11.62	5.64	8.81
monarch	−7.66	−3.66	−8.13	−1.47	8.34	2.62	5.98	1.68	1.47	0.83
ocean	−0.51	−1.64	−2.11	−1.15	−0.68	−1.04	0.68	0.64	2.62	3.19
paintedhouse	−0.32	−1.64	−2.62	−1	2.47	2	1.47	1	−1	−0.36
parrots	−0.36	−2.51	−1	−1.47	1.68	2.51	−0.32	0.32	0	1.15
plane	0.21	−2.3	1.51	−0.32	−1.15	1.47	−2.19	−1.32	1.62	2.47
rapids	−11.62	−6.94	0.15	−2.98	3.17	2.45	3.13	2.15	5.17	5.32
sailing1	0.64	0.32	−1.32	−2	0.68	−0.68	−2.15	0	2.15	2.36
sailing2	−8.81	−3.19	2.66	−0.83	−1.47	−1	8.81	2.04	−1.19	2.98
sailing3	−10.79	−3.66	−4.53	−1	4.17	−0.83	4.85	1.83	6.3	3.66
sailing4	−11.62	−3.19	1.98	−1.47	3.3	1.04	1.34	0.32	5	3.3
statue	−11.62	−11.62	1.81	−2.3	5.64	7.98	0	1.98	4.17	3.96
stream	−2	−0.96	0.32	−1	0.32	1	−1	0.32	2.36	0.64
studentsculpture	−0.72	2.19	0	−0.72	1.04	−0.17	−2	−3.77	1.68	2.47
woman	−6.11	−8.34	4.64	4.32	−2.19	−4.28	0.36	0.32	3.3	7.98
womanhat	−13.96	−9.28	2.7	−1.36	2.98	3.34	1.34	−1.98	6.94	9.28
Mean (Z-score)	−3.44	−2.38	0.24	−0.8	0.94	0.86	−0.52	−0.67	2.77	3
Order (Mean)	5	5	3	3	2	2	4	4	1	1
Min (Z-score)	−13.96	−11.62	−8.13	−3.81	−4.17	−4.28	−13.96	−11.62	−1.19	−0.83
Variance (Z-score)	26.14	13.45	7.57	1.96	7.21	4.75	18.77	10.01	5.37	6.84

Image	Resolution	Monobe’s	Kim’s	Proposed
carnivaldolls	610*488	2.43 s	0.81 s	0.21 s
womanhat	480*720	2.85 s	0.89 s	0.23 s
bikes	768*512	3.26 s	1.05 s	0.26 s

Ambient Light Setting	Setting1	Setting2
Display maximum luminance ( $cd / m^{2}$ )	120	120
Display black lever ( $cd / m^{2}$ )	0.5	0.5
Diffuse reflected luminance ( $cd / m^{2}$ )	12	24
Ambient luminance ( $cd / m^{2}$ )	200	1100

	Methods
	Original		Monobe’s		Mantiuk’s		Kim’s		Proposed
	Z-Score
Images	Setting1	Setting2	Setting1	Setting2	Setting1	Setting2	Setting1	Setting2	Setting1	Setting2
bikes	−6.47	−6	0	−3.81	2.62	3.3	−1.47	−0.47	5.32	6.98
building2	−5.32	0	4.64	−0.83	0.68	1.15	−2.98	−2.47	2.98	2.15
buildings	−1.47	−5.17	0.79	−0.72	0.64	−0.64	−0.64	4.53	0.68	2
caps	−1.68	−1	1	0	−1.68	−0.72	−0.36	1.36	2.72	0.36
carnivaldolls	4.28	0.68	0.15	−0.36	−1.15	0	−9.28	−2	6	1.68
cemetry	−2.83	−2.11	−1.36	−0.72	3.66	2.98	1.36	0.68	−0.83	−0.83
churchandcapitol	−1	1.36	−1.32	−0.32	0	1.04	0.96	−2.72	1.36	0.64
coinsinfountain	−3.19	−3.3	1.19	0.47	2	−0.11	−1	−0.72	1	3.66
dancers	0.79	2.47	1.51	0.83	0	1.45	−4.13	−6.94	1.83	2.19
flowersonih35	1.98	1.15	4.17	0.68	−4.17	−1.72	−6.94	−5.28	4.96	5.17
house	−0.32	1	−2.15	−0.68	0.32	−0.32	0.68	−0.32	1.47	0.32
lighthouse2	−3.19	−3.77	0	−0.17	−3.02	0.83	0.68	0.64	5.53	2.47
lighthouse	−2.62	−2.47	−1.68	−1.04	1.32	1.15	1.83	0.32	1.15	2.04
manfishing	6.66	4.64	3.96	−1.83	−2.3	0	−13.96	−11.62	5.64	8.81
monarch	−7.66	−3.66	−8.13	−1.47	8.34	2.62	5.98	1.68	1.47	0.83
ocean	−0.51	−1.64	−2.11	−1.15	−0.68	−1.04	0.68	0.64	2.62	3.19
paintedhouse	−0.32	−1.64	−2.62	−1	2.47	2	1.47	1	−1	−0.36
parrots	−0.36	−2.51	−1	−1.47	1.68	2.51	−0.32	0.32	0	1.15
plane	0.21	−2.3	1.51	−0.32	−1.15	1.47	−2.19	−1.32	1.62	2.47
rapids	−11.62	−6.94	0.15	−2.98	3.17	2.45	3.13	2.15	5.17	5.32
sailing1	0.64	0.32	−1.32	−2	0.68	−0.68	−2.15	0	2.15	2.36
sailing2	−8.81	−3.19	2.66	−0.83	−1.47	−1	8.81	2.04	−1.19	2.98
sailing3	−10.79	−3.66	−4.53	−1	4.17	−0.83	4.85	1.83	6.3	3.66
sailing4	−11.62	−3.19	1.98	−1.47	3.3	1.04	1.34	0.32	5	3.3
statue	−11.62	−11.62	1.81	−2.3	5.64	7.98	0	1.98	4.17	3.96
stream	−2	−0.96	0.32	−1	0.32	1	−1	0.32	2.36	0.64
studentsculpture	−0.72	2.19	0	−0.72	1.04	−0.17	−2	−3.77	1.68	2.47
woman	−6.11	−8.34	4.64	4.32	−2.19	−4.28	0.36	0.32	3.3	7.98
womanhat	−13.96	−9.28	2.7	−1.36	2.98	3.34	1.34	−1.98	6.94	9.28
Mean (Z-score)	−3.44	−2.38	0.24	−0.8	0.94	0.86	−0.52	−0.67	2.77	3
Order (Mean)	5	5	3	3	2	2	4	4	1	1
Min (Z-score)	−13.96	−11.62	−8.13	−3.81	−4.17	−4.28	−13.96	−11.62	−1.19	−0.83
Variance (Z-score)	26.14	13.45	7.57	1.96	7.21	4.75	18.77	10.01	5.37	6.84

Abstract

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Figures (9)

Tables (3)

Equations (16)

Journal of the Optical Society of America A