黑白图象彩色化技术已被广泛应用于遥感、天文、生物及医学等各个领域。在实现假彩色化的许多方法中,“光栅调制位相型密度假彩色编码”法,对光读度变化的灵敏度大,衍射效率高;图象相干噪音小;可获得零级、一级两种色彩互补的图象;设备装置简单,成本低,易于推广。光栅调制位相型密度假彩色编码技术,就其工艺过程来讲,将一张黑白底片编码、漂白之后,即可得到一张有原图片信息的矩形位相光栅,再将此矩形位相光栅经白光处理系统处理(即空间滤波),就可在白光处理系统的输出平面观察到放大彩色输出图 Black and white image colorization technology has been widely used in remote sensing, astronomy, biology and medicine and other fields. Among the many methods for implementing false colorization, the “raster-modulated phase-type density false color coding” method has high sensitivity to change of light reading and high diffraction efficiency; small image coherent noise; zero-level and first-level Color complementary images; device device is simple, low cost, easy to promote. Grating modulation phase density type false color coding technology, in terms of its process, will be a black and white film encoding, bleaching, you can get a picture of the original rectangular phase grating, and then the rectangular phase grating by white light processing system processing (Ie, spatial filtering), an enlarged color output map can be observed at the output plane of the white light processing system