采用多波段θ调制器作多光谱照像技术的研究

Study on Multispectral Photography with θ Multichannel Modulator

提出了一种用多波段θ调制的白光光学/数字图像处理作多光谱照相的技术,即通过使用多波段θ调制器对目标的某几个波段信息进行调制,使用傅里叶变换技术对各个多波段图像解调,可分别得到目标各波段的图像信息,然后通过假彩色融合得到目标多波段假彩色图像。从理论和实验上论证了使用多波段θ调制器与单个CCD探测器组成的多光谱照相系统,代替传统的多个相机构成的多光谱照相系统的可行性和优越性。该技术与传统多光谱照相技术相比,具有体积小、重量轻和假彩色融合操作简单方便等优点。

A multispectral photography of white-light optic/digital image processing with θ-multichannel modulator is brought forward, in which θ-multichannel modulator is used to modulate the several waveband information of the object, and the technique of Fourier transform is employed to decode the modulated image, then waveband information of the object is demodulated. Afterwards, a multispectral pseudo-color image can be obtained by means of pseudo-color fusion. A new multispectral system consists of θ-multichannel modulator and a single CCD. And it proves to be feasible to substitute the new system for traditional one composed by several cameras with different bands. Compared with the traditional multispectral photography system, the new one has many advantages, such as small volume and weight, easy operation in pseudo-color fusion.