Oh-jae Kwon

Nonlinearity compensated smooth frame insertion for motion-blur reduction in LCD

A nonlinearity compensated smooth frame insertion (NCSFI) method is proposed to reduce motion-blur caused by hold-type display in LCD. Firstly, each original frame is duplicated into two frames. Then in the first frame, spatial high frequency is removed and in the second frame, the same amount of high frequency is enhanced. Finally, look-up table based nonlinearity compensation is applied to the two new frames to compensate the nonlinearity between gray level and panel luminance. Experiments on real-time display system show that the proposed NCSFI method can reduce motion-blur significantly without luminance distortion

Motion vector correction based on the pattern-like image analysis

In this paper, we propose a motion vector correction algorithm to correct the erroneous motion vectors due to the failure of conventional motion estimation (ME) based on block matching algorithm (BMA). The proposed method is based on the pattern-like image analysis that consists of the periodic pattern detection and calculation of motion parameters for the motion vector correction. In addition, the proposed method corrects effectively the erroneous motion vectors using the relations between the periodic pattern and local/global minima depending on whether the periodic pattern is static or moving. Also, it does not significantly increase computational complexity since it uses the estimated motion vectors and the integral projection of the sum of absolute difference (SAD) previously obtained from the conventional ME. Experimental results indicate good performance of the proposed scheme with significant reduction the erroneous motion vectors.