摘要
针对最优灰度扫描算法在灰度级丰富的图像上产生轮廓线的问题,对算法进行非线性校正?首先分析最优扫描算法的灰度级与像素数据的关系,并与传统脉宽调制(PWM)灰度产生策略作比较,找出产生轮廓线的原因;根据人眼对不同灰度差值图像的主观感受,将灰度差值划分为可接受差值和不可接受差值;然后通过MATLAB对最优扫描各比特的灰度权值重新赋值,得到所有可能的组合,剔除不可接受差值的组合;最后计算线性度较好的组合在不同显示分辨率下的数据传输频率?实验结果表明:对于256级灰度图像,当校正后的8位比特的权值比例为208:104:52:24:14:8:3:1时,灰度图中的轮廓线从13条减少到0条?通过硅基有机发光二极管(OLED)微显示器观察,轮廓线消除,图像质量得到改善,并且在超高分辨率下,消耗的系统时钟频率比传统的场扫描法低,在降低系统成本上具有优势?
Optimal scanning algorithm produces contour on the image which is very rich in color, the algorithm will adopt non-linear calibration and eliminate the contour of image. Firstly, find out the relationship between the gray level and pixel data of the optimal scanning algorithm, and get the reason of contour with the traditional pulse-width modulation （PWM） gray-scale strategy comparison. Then according to the human eyes have different feelings on different gray error images, the gray error is classified as acceptable error and unacceptable error. Next, rearrange all possible optimal scanning gray weights by MATLAB, and exclude composition comprising an unacceptable error. Therefore, the rest combinations have good linearity. Finally, calculate the data transmission frequency at different display resolutions, experimental results show that the number of contour lines from 13 becomes 0 when the weight values of 8 bits turn to 208：104：52：24：14：8：3：1 for 256 level gray-scale images. The contour lines disappear by OLED-on-silicon microdisplay, image quality is improved, and in ultra-high resolution, system clock frequency is lower than the tradition field scanning method, it has a great advantage in reducing system cost.
出处
《光电工程》
CAS
CSCD
北大核心
2016年第12期200-205,共6页
Opto-Electronic Engineering
基金
国家自然科学基金项目"硅基有机发光微显示器的高性能顶发射界面及数字驱动研究"(61376028)
关键词
OLED微显示器
最优扫描
非线性校正
扫描效率
OLED microdisplay
optimal scan strategy
nonlinear correction
scan efficiency
