TY - GEN
T1 - Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays
AU - Lee, Chul
AU - Kim, Jin Hwan
AU - Lee, Chulwoo
AU - Kim, Chang-Su
PY - 2012
Y1 - 2012
N2 - We propose a novel backlight-scaled contrast enhancement algorithm to maintain the image quality when the backlight of a TFT-LCD display is dimmed for power reduction. First, we derive the transformation function to maintain the perceived luminance and enhance the contrast. Second, we model the perceptual distortion, which describes the information loss due to the backlight scaling. Then, we propose a Lagrangian method to maximize the backlight-scaled image contrast subject to the constraint on the perceptual distortion. Simulation results show that the proposed algorithm provides better image qualities than the conventional algorithms.
AB - We propose a novel backlight-scaled contrast enhancement algorithm to maintain the image quality when the backlight of a TFT-LCD display is dimmed for power reduction. First, we derive the transformation function to maintain the perceived luminance and enhance the contrast. Second, we model the perceptual distortion, which describes the information loss due to the backlight scaling. Then, we propose a Lagrangian method to maximize the backlight-scaled image contrast subject to the constraint on the perceptual distortion. Simulation results show that the proposed algorithm provides better image qualities than the conventional algorithms.
KW - Backlight scaling
KW - TFT-LCD
KW - contrast enhancement
KW - power management
UR - http://www.scopus.com/inward/record.url?scp=84875864835&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875864835&partnerID=8YFLogxK
U2 - 10.1109/ICIP.2012.6467479
DO - 10.1109/ICIP.2012.6467479
M3 - Conference contribution
AN - SCOPUS:84875864835
SN - 9781467325332
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 2793
EP - 2796
BT - 2012 IEEE International Conference on Image Processing, ICIP 2012 - Proceedings
T2 - 2012 19th IEEE International Conference on Image Processing, ICIP 2012
Y2 - 30 September 2012 through 3 October 2012
ER -