In Fig. 9.43, a boundary between distinct texture regions was established without difficul...

In Fig. 9.43, a boundary between distinct texture regions was established without difficulty. Consider the image at the top of the facing page, which shows a region of small circles enclosed by a region of larger circles.

(a) Would the method used to generate Fig. 9.43(d) work with this image as well? Explain your reasoning, including any assumptions that you need to make for the method to work.

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(b) If your answer was yes, sketch what the boundary will look like.

FIGURE 9.43 Textural segmentation. (a) A 600 × 600 image consisting of two types of blobs. (b) Image with small blobs removed by closing (a). (c) Image with light patches between large blobs removed by opening (b). (d) Original image with boundary between the two regions in (c) superimposed. The boundary was obtained using a morphological gradient operation.