CAJ | 학술논문

彩色图像成像时,光源的亮度变化影响着光源的光谱相对功率分布,影响着照明光源的色温,与成像后的检测目标对比度密切相关.因此研究在光源光谱不变的条件下,光源的亮度变化对颜色对比度的影响.光源的亮度调节采用PWM脉冲编码调节,分析了色块对比度随着光源的亮度变化规律,在CIEL*a*b*空间利用色差来评定色块间的对比度,根据最大色差选择了一个最佳的光源照度等级.
채색도상성상시,광원적량도변화영향착광원적광보상대공솔분포,영향착조명광원적색온,여성상후적검측목표대비도밀절상관.인차연구재광원광보불변적조건하,광원적량도변화대안색대비도적영향.광원적량도조절채용PWM맥충편마조절,분석료색괴대비도수착광원적량도변화규률,재CIEL*a*b*공간이용색차래평정색괴간적대비도,근거최대색차선택료일개최가적광원조도등급.
In the process of color signal imaging,the intensity of illumination affects spectral power distribution and color temperature ,which is correlated to color contrast. This paper studies the relationship between the in-tensity of illumination and color contrast. PWM pulse code regulating is used to adjust the intensity of illumina-tion. The variable law of color contrast with the intensity of illumination is explored and the average color dif-ference in CIEL*a*b* color space is applied to evaluate the color contrast of colored surface. The best PWM grade is then chosen according to the maximum average color difference.