【摘 要】
：
An artificial neural network used to realize the approximating problem of the color appearance model (CAM) CIECAM02 in color management is demonstrated. GretagMacbeth ColorChecker Charts, which now are widely used in calibration of digital camera, are cho
【机 构】
：
NationalLabofColorScienceandEngineering,SchoolofInformationScienceandTechnology,BeijingInstituteofTe
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
An artificial neural network used to realize the approximating problem of the color appearance model (CAM) CIECAM02 in color management is demonstrated. GretagMacbeth ColorChecker Charts, which now are widely used in calibration of digital camera, are chosen as samples to implement the forward and reverse color appearance models. When the predictive results are evaluated, for forward model, the output color appearance space is converted to the uniform color space based on CAM and is evaluated, while for reverse model, because the prediction precision is insufficient, we try to convert the color appearance space, which is the cylinder space, to the cube space similar to the red, green, and blue (RGB) space, and the results show that the precision is obviously improved.
其他文献
根据美国航空和宇宙航行局Langley研究中心的F. Hohl提供的消息，美国航空和宇宙航行局正试图发展发射1千瓦脉冲功率的核泵浦激光器，它是用He3中子反应的裂变碎片进行泵浦的。
The dynamic characteristics are investigated for a microring laser with an external radius of 12 μm subject to external optical injection. Single-mode operation with a side mode suppression ratio of 33.4 dB is realized at a biasing current of 25 mA and a
首次定量地研究了氧对F2/H2链反应化学激光谱线输出数目、单谱线出现时间和谱线强度的影响。各振动能级的单谱线出现次序均呈现正J移规律。v=1至v=6的转动能级都存在非平衡分布。实验测定到P6(4)→P1(9)和P6(6)→P1(11)激光的级联跃迁。模型计算结果与实验结果相当符合。
对大型固体激光装置中的关键器件—大尺寸1064 nm 波段HfO2/SiO2窄带滤光片进行了研究，分析了监控波长对信噪比和光源稳定性的影响。通过优化监控参数，设备监控精度可达到镀制窄带滤光片的需求。制备过程中的薄膜光谱分析表明：随着蒸镀过程的进行，氧化铪(HfO2)的实际厚度会逐渐小于设计值，而二氧化硅(SiO2)的实际厚度则会逐渐大于设计值；这种变化趋势导致的厚度误差会严重影响带通的波形；另外掩模板造成的厚度误差也是
Questions hovering over the modulation of bandgap size and excitonic effect on nonlinear absorption in two-dimensional transition metal dichalcogenides (TMDCs) have restricted their application in micro/nano optical modulator, optical switching, and beam
采用Bulk模式，在Monin-Obukhov相似理论的基础上，利用南海及东海近海面常规气象要素，对中国海域近海面大气湍流的时空分布特征进行分析。编制了应用程序对输入的南海及东海(北纬10°~33°，东经110°~130°)常规气象要素进行分析(常规气象要素包括海水温度、大气温度、大气湿度、平均风速和大气压力)。从气象要素平均场出发，先估算出中国近海面大气湍流的整体图像；然后，对所测量的常规气象要素依据区域的不同(分为南海和东海)进行月度气海温差统计，得出南海及东海各12组近海面二维空间上(经度和纬度)各