Video Halftoning Preserving Temporal Consistency

Abstract

Video halftoning is a key technology for use in the new display device, electronic paper (e-paper

Power-scalable multi-layer halftone video display for electronic paper

“…In order to serve to display under different frame rates, the original halftone video obtained using [7] is divided into 1 base layer and several enhancement layers. Basically, the base layer contains the most important information that must be displayed rst while the enhancement layers are used to improve video quality if higher frame rate is permitted.…”

“…However, icker aws are still not ef ciently reduced by means of the existing methods. Recently, we have proposed a new video halftoning method [7], which is composed of spatial error diffusion and interframe reference error diffusion. When compared with traditional 2D and 3D error diffusion techniques, experimental results show that our method can signi cantly reduce the average icker rates under the constraint of comparable video quality.…”

“…We study and compare uniform sampling and non-uniform sampling of original halftone video for display with different frame rates. The halftone video is generated using our previous video halftoning method [7], which achieves temporal consistency with ef cient icker reduction. Power saving is measured in terms of number of ickers per second since power is consumed when halftone values are changed.…”

“…In [7], we presented a new video halftoning method, which is composed of intra-frame error diffusion and inter-frame reference, to reduce icker aws in halftone video. In our method, the video frames are divided into many groups of pictures (GOPs) for video halftoning.…”

Temporal Frequency of Flickering-Distortion Optimized Video Halftoning for Electronic Paper

“…When a higher frame rate (e.g., as high as 30 fps) is considered, as shown in Fig. 8(c), the difference between any two neighboring pixels will be nearly a constant based on the assumption that motion is linear over a short period of time, that is, (12) Under this circumstance, (8) can be simplified as (13) and then the flickering sensitivity threshold can be derived as (14) Although the flickering sensitivity threshold can be used directly as a flickering reduction threshold in (2) for video halftoning with proper flickering elimination, the major visual artifacts introduced in Section II still exist. The main reason is that the use of makes the distribution of halftone values nonuniform, as described in Section II-B3.…”