为了使由等离子体显示器(PDP)反γ校正和有限灰度级显示方法引起的灰度损失得到改善,在分析灰度损失原因及有序抖动和随机抖动特点的基础上,提出了一种抖动与孤立像素点分离相结合的灰度级增强方法。该方法首先采用有序抖动和孤立像素点分离对γ校正后的图像进行灰度增强;然后把图像数据映射到有限灰度级,计算有限灰度级与需要显示的灰度级之间的误差;最后采用随机抖动和孤立像素点分离对有限灰度级图像进行灰度增强。实验结果表明,反γ校正和有限灰度级图像的灰度均得到了显著增强,低灰度级和中高灰度级过渡平滑,没有周期性抖动噪声,孤立像素点的亮度显著降低,图像显示效果明显优于仅采用随机抖动或有序抖动的图像。 In order to improve the gray scale loss caused by the inverse gamma correction and the limited gray level display method of the plasma display (PDP), on the basis of analyzing the reason of the gray loss and the characteristics of the orderly jitter and the random jitter, a jitter Gray level enhancement method combined with separation of isolated pixels. The method first uses the orderly jitter and the separation of isolated pixels to perform gamma enhancement on the gamma-corrected image. Then the image data is mapped to the limited gray level, and the error between the limited gray level and the gray level to be displayed is calculated Finally, the gray level of the limited gray level image is enhanced by random jitter and isolated pixel points separation. The experimental results show that both the gray level of the inverse γ correction and the limited gray level image are significantly enhanced, the low gray level and middle to high gray level transition smoothly, there is no periodic jitter noise, the brightness of the isolated pixel is significantly reduced, the image display The effect is clearly better than using only random jitter or orderly jitter images.