对语音谱图的黑白负片、正片及其乘积正片进行空间编码，在白光处理器中可得到按强度假彩色编码的语音谱图。
By means of spatial encoding technique for black-white negative, positive and product positive of spectrogram an intensity pseudocolor-coded spectrogram is obtained in a white-light optical processor.
照片底片上，左右黑白与正片恰好相反。
In the negative, right and left, and black and white are reversed.
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