48.1: LCD Motion Blur Reduction with Motion Compensated Inverse Filtering

Klompenhouwer, Michiel A.; Velthoven, Leo Jan

doi:10.1889/1.1825760

Cited by 26 publications

(17 citation statements)

References 6 publications

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“…The limited temporal response of LCDs is a consequence of primarily two characteristics: (1) slow onset and offset times and (2) the sample-and-hold property related to both the design of the LCD driver circuitry and the LCD itself (Shima et al, 1995;Yamamoto et al, 2000). Several techniques have been suggested for improving the temporal response of LCDs, including modified LCD driving methods (Nakamura et al, 1998;Nakamura and Sekiya, 2001;Nose et al, 2001;McCartney and Balram, 2004), intermittent illumination (Fisekovic et al, 2001;Kurita, 2001;Pan, 2005), video processing (Bitzakidis, 1995;Klompenhouwer and Velthoven, 2004), and doubling the refresh rate (Kurita, 2001;Lee et al, 2005). The onset and offset times of more recently developed ferroelectric liquid crystal-on-silicon (FLCoS) displays are significantly less than those of conventional LCDs (Underwood, 2000).…”

Section: Introductionmentioning

confidence: 99%

The effect of FLCoS‐display hold time on the perceived blur of moving imagery

Geri¹,

Morgan²

2007

J Soc Info Display

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Abstract— The on‐ and off‐times of LCDs have decreased significantly over the past few years. However, long hold times, while increasing light output, have limited the temporal resolution of these devices. We have varied hold time and used a perceptual technique to assess the resulting change in blur of a moving test target presented on an FLCoS display. The technique requires observers to adjust the gap between two vertical lines that move across the display at various speeds. It was found that for a 13.4‐msec hold time, the threshold gap width, and thus by implication the perceived blur, increased significantly from about 3 to 22 pixels as line speed was increased. For hold times of 8, 6, 4, and 2 msec, threshold gap width remained approximately constant at between about 2 and 5 pixels as line speed was increased. The results of the perceptual test used here suggest that reducing FLCoS hold time to 8 msec significantly improves the quality of moving imagery. Further, decreasing the hold time to 2 msec results in perceptual blur that extends over as little as 6 arc‐minutes.

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Section: Introductionmentioning

confidence: 99%

The effect of FLCoS‐display hold time on the perceived blur of moving imagery

Geri¹,

Morgan²

2007

J Soc Info Display

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“…Several techniques have been suggested for improving the temporal response of LCD displays. For instance, modified LCD driving methods [3], intermittent illumination [4], and video processing [5]. In addition, simply doubling the refresh rate may also improve image quality [4].…”

Section: Introductionmentioning

confidence: 99%

P-76: Perceptual Tests of the Temporal Properties of a Shuttered LCD Projector

Winterbottom¹,

Geri²,

Morgan

et al. 2006

SID Symposium Digest

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“…These methods enhance video images in a spatial frequency domain to compensate motion blur before a video is reproduced on a display. In addition, deconvolution methods such as motion‐compensated inverse filtering (MCIF), based on frequency domain analysis, have been proposed . These compensated filters are used for conventional hold‐type displays, which emit light at constant intensity in a frame (hold emission).…”

Section: Introductionmentioning

confidence: 99%

Motion blur reduction with triangular waveform emission and optimized enhance filter

Usui

Fujisaki²,

Shiga

2019

J Soc Info Display

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Degradation of moving image quality by motion blur on hold‐type displays is a well‐known issue. In order to reduce motion blur, a number of driving methods, such as a higher frame rate and a shorter temporal aperture, have been proposed. Methods to reduce motion blur by means of signal processing as a precompensation method have also been proposed. In these methods, however, hold emission that emits light at a constant intensity during a frame is used. Since the spatial frequency response of the hold emission in a moving picture has a null point, the effectiveness of precompensation methods is limited to the lower‐spatial frequency domain. A triangular waveform emission has been investigated, and it has a higher spatial frequency response than hold emission. In the present paper, we calculated an optimized enhancement filter for the triangular waveform emission as a precompensation method and demonstrated its effectiveness for reducing motion blur by using the triangular waveform emission and the optimized enhancement filter. As a result, the optimized enhancement filter reduced motion blur and suppressed distortion that emerged when using a conventional enhancement filter.

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48.1: LCD Motion Blur Reduction with Motion Compensated Inverse Filtering

Cited by 26 publications

References 6 publications

The effect of FLCoS‐display hold time on the perceived blur of moving imagery

The effect of FLCoS‐display hold time on the perceived blur of moving imagery

P-76: Perceptual Tests of the Temporal Properties of a Shuttered LCD Projector

Motion blur reduction with triangular waveform emission and optimized enhance filter

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