Sheet9ip - Tanta university Faculty of engineering Computer and automatic control department Image processing course Fourth year students Sheet 9 Date

Sheet9ip - Tanta university Faculty of engineering Computer...

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Tanta university Faculty of engineering Computer and automatic control department Image processing course Fourth year students Sheet 9, Date : 14/12/2011 ------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------- Instructor: Dr. Hamed Hemeda Sheet 9 1. The three images shown below were blurred using square averaging masks of sizes n = 23, 25, and 45, respectively. The vertical bars on the left lower part of (a) and (c) are blurred, but a clear separation exists between them. However, the bars have merged in image (b), in spite of the fact that the mask that produced this image is significantly smaller than the mask that produced image (c). If you know that the vertical bars are 5 pixels wide, 100 pixels high, and their separation is 20 pixels. Explain bar merging in image b. 2. Explain one way for digital image smoothing. 3. The two 256 gray levels images shown in the figure below have the same size and border. Although they are quite different inside they have the same histogram. Suppose that each image is blurred with a 3x3 averaging mask(Problem 3.14 Gonzalez 3ED).
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