1, a full color / color imaging
It can be seen as an array of many photoelectric conversion, each of which corresponds to a pixel converter.
CCD high prices, but the treatment effect is better than CMOS, such as noise is relatively small.
Only light of a particular color may be a specific color by a color filter. In each pixel on a color filter element was added to form the color filter array.
Bayer pattern arrangement, the largest proportion of green, because the human eye is more sensitive to green. Red and blue bisects the remaining portion. To obtain a mosaic image, as shown below:
1, a mosaic image, the mosaic image is divided into three, a white portion in FIG. 3 taken around 3 * A weighted average of squares and filled into it, to obtain a three-color image is then synthesized.
2, the first processing for green, a green image as minimal information missing, some images may be extracted according to the green image, thereby affecting the red fill weights blue image.
3, edge detection effect is not good, because the big edge pixels change, to participate in the weighted average of pixel gap is large, so there will be blurring the edges.
By using the dichroic prism beam of light into three beams, red, green and blue, then red, green and blue images into three by the focal plane, then three images are synthesized, and a color display. Very good, but power consumption is large. For fast-moving objects and, if the reception time of three different light beams, three images are not the same time, it will cause distortion of the synthesized image.
2, infrared imaging
If the design outdoor infrared imaging systems, vapor absorption bands should be avoided at design time.
Infrared radiation three laws
Because most of the energy of the reflected or transmitted loss, less energy absorption, the emitted infrared energy less.
Energy infrared imaging system absorbs mainly in the vicinity of the peak wavelength, so when the object peak wavelength of the gap is too large can not be (e.g., in different atmospheric windows) can not be used (operating frequencies) with a thermal imaging system 
ray scanning omitted.
3, the polarization of the imaging system
We hope to use through polarization and enhance the quality of the images obtained.
Our photo imaging process, using the main characteristics of the optical electric field, and are not sensitive to the magnetic characteristics, during the discussion of polarization imaging, consider the characteristics of the main field.
Since the specular reflection of the surface, the polarization state of the incident light can be changed, the absorption properties of the medium will vary with the polarization state of light. We need to add a lens polarizer, in order to achieve the right results.
Infrared intensity image using the radiation, and a relatively large temperature dependence.
And the infrared image of the main polarization are different absorption characteristics utilizing polarization of light of various substances.
We need to four rotation angle of the polarizer, 0,45,90,135 °. Then you can calculate the AOP and DOP.
Polarization defogging
A polarization amount. When the polarization angle is 90 degrees, the "worst state." When the polarization angle is 0 degrees, the "best state." t is an attenuation factor.
Amax, Amin can be measured, A∞ rectifiable, A = Amax + Amin, I = Imax + Imin
Spectral imaging system
Only conventional three RGB color channels, there are up to more than 200 high spectral channels.
