摘要
目的通过心理物理学实验,在暗室下构造基于LCD显示器的人眼对比敏感度函数。方法通过测试不同颜色空间的自相关性,选择通道间相关性最小的颜色空间;选择4个颜色点制作不同空间频率、不同对比度的光栅图像;安排15人进行观测试验,得到不同空间频率下的心理对比度阈值,将得到的数据进行拟合得到对比敏感度函数模型。结果拟合得到了L通道、A通道、B通道的人眼对比敏感度函数。结论 Lab颜色空间的自相关性数值以0.1134最低,其正交性最好。得到的对比敏感度函数也符合人眼的低通特性,研究结果对图像色差模型的改进和图像压缩具有重要意义。
To build the human contrast sensitivity function based on LCD display in the dark room via the psychological physics experiment. Through testing the auto-correlation value of different color spaces, the color space with minimal inter-channel correlation was chosen. Grating images with different spatial frequency and different contrast were made based on the four chosen color points. A total of 15 people were arranged for observation experiment, and the psychological contrast threshold under different spatial frequency was obtained. The contrast sensitivity function model was then obtained by fitting the threshold data. The CSFs of channel L, channel A and channel B were obtained by fitting. The minimal auto-correlation value of LAB color space was 0.1134, suggesting the best orthogonality. The contrast sensitivity function obtained matched the low pass characteristic of human eyes, so the results of the study will be quite meaningful for improving the color difference model and image compression.
出处
《包装工程》
CAS
CSCD
北大核心
2015年第1期134-138,150,共6页
Packaging Engineering
