针对复杂背景中低照度伪装目标检测难度大的问题, 基于中国颜色体系建立了lαβ颜色空间的l分量数据表, 通过外场偏振检测实验, 测试了伪装目标在一天中偏振信息的变化情况, 并研究了此分量表征偏振信息和反映偏振检测能力的问题。实验结果表明, 利用建立的l分量数据表, 在低照度条件下l分量的灰度(偏振度)级分辨率较L*分量高, 虽然在灰度图中目标与背景对比度较低不易识别目标, 但在偏振图中不仅目标与背景的对比度明显提高, 而且对阴影目标检测能力较强, 计算结果与人眼观察结果一致。

In order to detect complicated background camouflage target under the low illumination, based on the Chinese color system, the l components data table of the lαβ color space is established. By the field experiments of camouflage target polarization detection in the whole day, the l components are further researched on representing polarization information and reflecting polarization detection capability. The experimental results are showed. Using the l components data table under the low illumination, the gray level resolution is higher than L*a*b* color space. The gray contrast of targets and background is too low to detect targets easily, but the polarized contrast of targets and background is obviously improved. The ability of detecting shadowed target is stronger than L*a*b* color space. The calculation data is consistent with the interpretation result of human eye.