Flicker reduction in LED-LCDs with local backlight

Abstract

Abstract-Local backlight dimming of LCD with LED backlight can reduce power consumption and improve quality of displayed images and videos. However, important variations of LED over time produce a visually annoying artifact called flickering. In this work, we propose a new algorithm to reduce flickering while maintaining video quality. The proposed algorithm uses an adaptive second order Infinite Impulse Response (IIR) in which coefficients are calculated from the local image features. Experimental results show that the proposed method can reduce flickering while simultaneously keeping similar video quality in terms of PSNR and MSE.

A dual modulation algorithm for accurate reproduction of high dynamic range video

“…Rendering HDR video requires additional care compared to HDR image, as frame-by-frame rendering might lead to temporal flickering due to high-frequency changes in the backlight. Even though it is possible to reduce the flickering using postprocessing [13], it is preferable to directly handle it during rendering. Burini et al [11] considered temporal variation in video sequences and, in order to reduce the flickering effect, implemented an infinite impulse response (IIR) filter integrated to their dual modulation method.…”