By Richard H. Vollmerhausen
Advances in strong nation detector arrays, flat panel screens, and electronic photograph processing have brought on an expanding number of sampled imaging items and chances. those know-how advancements offer new possibilities and difficulties for the layout engineer and procedure analyst--this tutorial's meant reader.
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Extra resources for Analysis of sampled imaging systems
3 SAMPLED IMAGER RESPONSE FUNCTION In this chapter, the response function for a sampled imager is derived. The sampled imager response function quantifies the transfer response of the sampled system; that is, it describes how well the desirable scene content is preserved within the image. The response function also quantifies the sampling artifacts which will be visible in the image. The procedure for finding the sampled imager response function exactly parallels the procedure described in Chapter 2 for finding the transfer response for a non-sampled imager.
As an example, let the magnification of the system equal 1. 14. 2, respectively. 14 Eye transfer function. 15. A target (a single bar) is imaged by a lens onto an image plane. A detector scans across the image plane 40 Chapter 2 and the output of the detector is an electrical signal that represents the intensity variation across the image on the line scanned by the detector. The variation in the electrical signal is related to the spatial variation by the scan velocity. 39) where v is the scan velocity in milliradians per second and ξ is spatial frequency in cycles per milliradian.
The psf of the display is simply the size and shape of the display spot. The finite size, shape and intensity distribution of the display spot must be converted from a physical dimension on the display surface to sensor angular space. 13). For the rectangular display element, the height and width of the display element are converted to the sensor's angular space in the same way. 13 Conversion of CRT spot size to angular coordinates. 28) where the angular display element shapes are given in milliradians.