spectrum art波普艺术spectrumn.系列；幅度；范围；光谱；[科]频谱spectrum of difference value差值吸收光谱spectrum threshold algorithm光谱阈值法spectrum measuring projector光谱测量投影仪spectrum test and processing波谱测试及处理spectrum of surface features地物波谱spectrum analysis/methods光谱分析／方法Spectrum and colour spectrum光谱与色谱spectrum management computer光谱管理计算机spectrum matched filter bank频谱匹配滤波器组spectrum-envelope of voice语音频谱包络