Page 192 - Intelligent Communication Systems
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CHAPTER 12/COMPUTER VISION 163
FIGURE 12.8 Wave form of Walsh function.
Figure 12.9 shows an example of W m/(n, k). When N = K = 4, 16 functions from
WQO to w 33 of W m[(n, k) are obtained.
The Walsh transform spectrum for image g(n, k) is shown in Eq. (44).
G(m, I) is a two-dimensional Walsh spectrum and is used for the feature parame-
ter of a two-dimensional image g(n, k). The coefficients of the Walsh function show
the feature of an image and are used for image analysis. When image analysis is
performed, the Walsh coefficients of an image are calculated and compared with
those of a sample image, and then the image is analyzed.
