多谱段摄影是遥感技术的重要组成部分。从卫星或飞机上拍得的多谱段图像,包含丰富的地物特征辐射信息,而利用加色原理将多谱段的影像合成为假彩色影像,可增强地物特征的差异性,突出希望得到的信息,从而提高图像判读的水平。彩色合成仪实质上是一种多光路投影系统,国内外已有多种型号。一般采用三个(少数为四个)投影系统,可将三张不同谱段的黑白负片或透明正片的影像,通过不同颜色的滤光镜投影重叠在同一屏幕上,构成彩色影像。这类合成仪中,多数首先考虑为直接目视观察合成彩色影像,必要时才复制成硬拷贝。因此,一般都设计成固定的放大倍率(例如日本MSV-300,国产WPD-1和CSH-Ⅱ均为5倍),并采取腊屏等措 Multi-spectral photography is an important part of remote sensing technology. Multi-spectral images taken from satellites or airplanes contain abundant feature feature radiation information. However, the use of additive colorization principle to synthesize multi-spectral images into false color images can enhance the difference of feature features and give prominence to hope Get the information, so as to improve the level of image interpretation. Color synthesizer is essentially a multi-optical projection system, there are many models at home and abroad. In general, three (a few of four) projection systems can be used to project black and white negative images or transparent positive images of three different spectrum segments onto the same screen through the projection of different color filters to form a color image. Most of these synthesizers, the first to consider for the direct visual observation of synthetic color images, if necessary, copied into hard copy. Therefore, generally designed for a fixed magnification (for example, Japan’s MSV-300, domestic WPD-1 and CSH-Ⅱ are 5 times), and take such measures