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Analysis and Evaluation of Sampled Imaging Systems (SPIE by Richard H. Vollmerhausen PDF

By Richard H. Vollmerhausen

ISBN-10: 0819480770

ISBN-13: 9780819480774

Advancing expertise in detector arrays, flat panel screens, and electronic photo processing offers new possibilities to extend imaging functions and improve procedure functionality. Technical managers and layout engineers are confronted with comparing the associated fee, weight, and function of an ever-expanding choice of expertise techniques. This instructional textual content presents the idea, approaches, and knowledge essential to assessment and evaluate the functionality of accessible imaging applied sciences. half I updates the sooner paintings offered in research of Sampled Imaging platforms (2000). half II discusses functionality review of electro-optical imagers. half III presents machine courses (on a supplemental CD-ROM) and updated details on detector arrays, optics, and demonstrate strategies. The ebook covers quite a few reveal codecs and interfaces, and gives distinct info on to be had focal aircraft arrays (FPAs). specific emphasis is put on conception and perform for the big variety of accessible infrared FPAs. applied sciences represented contain InSb, HgCdTe, QWIP, and uncooled thermal arrays. details is equipped at the quantum potency, blur, crosstalk, and noise features of every know-how. The detector and array dimensions of obtainable FPAs are supplied. the knowledge on optics, demonstrate, and FPA subassemblies permits the version person to make speedy and real looking functionality exams of electro-optical imager designs.

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Extra resources for Analysis and Evaluation of Sampled Imaging Systems (SPIE Tutorial Text Vol. TT87) (SPIE Tutorial Texts)

Example text

13) Let The Sampling Process 19 Now, R() is a function of frequency that multiplies S() (the function of frequency and X in the brackets). 17 shows S(), R(), and the product G(). G() is, of course, the same function as was shown in Fig. 16. S() is a periodic function of frequency that can be thought of as representing the Fourier transform of the samples of f(x). The display MTF R() acts upon S() to produce the displayed image. In this view of the sampling process, an array of delta functions spaced X distance apart samples the intensity distribution f(x).

14 shows the two-dimensional Fourier transforms of the images in Fig. 13. The transform of the original image is to the left, and the transform of the blurred image is to the right. 15 shows the intersection of the two-dimensional plots with the horizontal and vertical planes. That is, Fig. 15 is “onedimensional” plots of the Fourier transforms. The horizontal and vertical plots do not represent the scene in any real sense. No actual scene is separable. 12 This figure illustrates that one-dimensional MTF plots are easier to interpret and better for comparing functions.

22) relates the displayed image spectrum to the spectrum of the presampled function, the sample spacing, the sample phase, and the display The Sampling Process 23 MTF. 22) quantitatively describes the relationship between the various stages of the sampling process. This equation allows us to explore design tradeoffs in a sampled imager. 18(a) Sampling replicates the spectrum F() at every integer multiple of the sample frequency. In this case, the sample rate is five per unit distance. The MTF of the display R() then multiplies the replicated spectra.

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Analysis and Evaluation of Sampled Imaging Systems (SPIE Tutorial Text Vol. TT87) (SPIE Tutorial Texts) by Richard H. Vollmerhausen


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