Binary Vision

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5.2 MaskApplying a mask to an image is a basic concept in imageprocessing – convolution.(1) What is a mask: A mask is a set of pixel positions withvalues called weights. A 3x3 mask is as follows.w1 w2 w3w4 w5 w6w7 w8 w91 w2 w31 1 1111w4 w5 w61 1 1w7 w8 w91 w2 w31 2 1242w4 w5 w61 2 1w7 w8 w9
(2) How to use a mask:For any point (x,y) in the image, align the centerof the mask to it. We havefnew( x,y)=9∑ wi=1iziz1 z 2 z3w1 w2 w3z 4 z5 z 6w4 w5 w6z 7 z8 z9w7 w8 w9(x,y)
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Page 6 and 7: 5.3 Counting objectsApplications: E
Page 8 and 9: 5.3 Counting objects -- method 1Com
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Page 14 and 15: 5.3 Counting objects -- method 2Rec
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Page 34 and 35: 5.4 Binary MorphologyFunction: Extr

Binary Vision

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