摘要
平板电视播放运动图像时清晰度会下降,主要由显示器时间频率响应带宽限制和运动黑白条纹亮度闪烁造成。实验表明,当CCD曝光频率比较高时,静止的CCD摄像机也可以进行动态清晰度图像拍摄。运动速度增加时,开始是频响展宽因素起主导作用,当运动速度达到某一值时,运动闪烁开始成为主要因素。虽然调制度、动态响应时间等频响展宽测量方法在某些情况下与主观运动清晰度具有一定关系,但在运动闪烁为主要原因的情况下,前述测量方法都不能正确反映动态清晰度的变化。
When the picture is moving, the resolution of flat panel display will degrade, which is caused by frequency response limitation and black/white flicker. Experiments demonstrate that moving picture pursuing system is not necessary when the CCD camera＇s exposure frequency is high. In the case of both LCD and PDP, it is found that when the picture moving speed is low, the frequency response limitation is dominant, while black/white flicker becomes dominant when the speed is higher. Although in some cases frequency response widening measurement method of modulation depth, pulse width and so on may present some relationship with subjective moving picture resolution, they could not reflect correctly the resolution of moving picture when black/white flicker dominates.
出处
《电视技术》
北大核心
2007年第5期93-96,共4页
Video Engineering
关键词
平板电视
运动图像
清晰度
测量
flat panel display
moving picture
resolution
measurement
