Theory and experiments of a new stereoprojection technique that uses a white-light optical image-processing system are described. The stereoprojection can be accomplished in two steps: (1) spatial encoding of stereoscopically coupled images and (2) spatial polarization filtering at the Fourier plane in a white-light optical image processor. Compared with existing stereoprojection methods, the present technique requires only one projector and a single piece of encoded film; therefore it is much simpler and more economical to use for practical applications.

An algorithm with non-linear weight factors in the summation process for fuzzy correlation of color his-tograms is presented, in which non-linear weights are assigned to some characteristic colors of interest. Experimental results show that this can improve the retrieval of color images with partial aberrations or with local color characters.

报告了基于白光信息处理的光学/数字彩色摄影技术的研究进展,包括编码相机、彩色图像解码仪、数字解码中的加窗Fourier变换算法和整数Fourier变换、解码图像的色度校正以及衍射零级融合术等。由于本技术兼备光学与数字技术的特点，具有大信息量、利于网络传输、便于档案存储和色饱和度增强的特点，因此首先在航空摄影和地面远距离特殊摄影中得到重要应用。

A method of amplitude-compensated matched filtering is presented. This yields much better discrimination and a sharper autocorrelation peak compared with the classical matched spatial filter and the phase-only one. By computer simulation in the case of alphanumeric characters, it is concluded that, although the phase information is significantly more important, in the case of a matched filter, the amplitude is important too. Three-dimensional graphs of autocorrelation and cross-correlation are also provided.

Theoretical and experimental analyses of color-image pattern recognition using a multiwavelength Fresnel holographic filter (FHF) are presented. The FHF technique permits a greatly relaxed spatial-filter alignment requirement, use of a white-light source, negligible color cross talk, and high diffraction efficiency of the spatial filter.