TY - GEN
T1 - Visibility enhancement via optimal gamma tone mapping for OST displays under ambient light
AU - Lee, Kyu Ho
AU - Kim, Jae Woo
AU - Kim, Jong Ok
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2016R1A2B4012865).
PY - 2018/2/20
Y1 - 2018/2/20
N2 - Visibility of the overlaid virtual image is sensitively affected by surrounding illumination in OST (optical see-through) displays. Ambient light may especially deteriorate the visibility of low gray levels, whose luminance is comparable to ambient light. Therefore, we first derive a luminance model based on actual measurements under various ambient lights, and use this model to extract low gray-level region (LGR), which suffers severely from contrast loss. It was experimentally found that gamma tone mapping is the most appropriate for LGR contrast enhancement of OST displays. The gamma value is optimally determined by cost minimization. Visibility enhancement is verified by experiments on a practical setup with a variety of ambient light levels and images.
AB - Visibility of the overlaid virtual image is sensitively affected by surrounding illumination in OST (optical see-through) displays. Ambient light may especially deteriorate the visibility of low gray levels, whose luminance is comparable to ambient light. Therefore, we first derive a luminance model based on actual measurements under various ambient lights, and use this model to extract low gray-level region (LGR), which suffers severely from contrast loss. It was experimentally found that gamma tone mapping is the most appropriate for LGR contrast enhancement of OST displays. The gamma value is optimally determined by cost minimization. Visibility enhancement is verified by experiments on a practical setup with a variety of ambient light levels and images.
KW - Ambient light
KW - Gamma tone mapping
KW - Low gray-level region
KW - OST display
KW - Visibility enhancement
UR - http://www.scopus.com/inward/record.url?scp=85045333346&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045333346&partnerID=8YFLogxK
U2 - 10.1109/ICIP.2017.8296325
DO - 10.1109/ICIP.2017.8296325
M3 - Conference contribution
AN - SCOPUS:85045333346
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 470
EP - 474
BT - 2017 IEEE International Conference on Image Processing, ICIP 2017 - Proceedings
PB - IEEE Computer Society
T2 - 24th IEEE International Conference on Image Processing, ICIP 2017
Y2 - 17 September 2017 through 20 September 2017
ER -