[mmdlith] [Up] [mmdpieces] | Demonstrations |
The input image is a binary image of a printed circuit board. The decomposition is created mainly using openings by structural elements that depends on the geometry of the circuit board.
The binary image of a printed circuit board is read.
>>> a = mmreadgray('pcb1bin.tif');
>>> mmshow(a);
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a |
The square islands are detected using an opening by a square of size 17x17.
>>> c = mmopen(b,mmsebox(8));
>>> square = mmcdil(c, a);
>>> mmshow(b, c);
>>> mmshow(holes, square);
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b, c | holes, square |
The circle islands are detected using an opening by an Euclidean disk on a residues image.
>>> f = mmsubm(b, c);
>>> g = mmopen(f, mmsedisk(8));
>>> circle = mmcdil(g,a);
>>> mmshow(f, g);
>>> mmshow(holes, square, circle);
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f, g | holes, square, circle |
The rectangular islands are detected using an opening by a rectangle of size 25 x 8 on a residues image. The rectangle structuring element is built from the composition of vertical and horizontal lines.
>>> i = mmsubm(f, g);
>>> m = mmopen(i,mmsedil(mmseline(8,90), mmseline(25)));
>>> rect = mmcdil(m,a);
>>> mmshow(i, m);
>>> mmshow(holes, square, circle, rect);
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i, m | holes, square, circle, rect |
The thick connections are detected using an opening by a square on a residues image.
>>> o = mmsubm(i,m);
>>> p = mmopen(o, mmsebox(2));
>>> thin = mmcdil(p,a);
>>> mmshow(o, p);
>>> mmshow(holes, square, circle, rect, thin);
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o, p | holes, square, circle, rect, thin |
The thin connections are detected using an opening by a square on a residues image.
>>> r = mmsubm(o,p);
>>> s = mmopen(r, mmsebox());
>>> thick = mmcdil(s,a);
>>> mmshow(r, s);
>>> mmshow(holes, square, circle, rect, thin, thick);
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r, s | holes, square, circle, rect, thin, thick |
The main components of the circuit are overlayed and presented in a single image.
>>> mmshow(holes, square, circle, rect, thin, thick);
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holes, square, circle, rect, thin, thick |
[mmdlith] [Up] [mmdpieces] | ![]() |
Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center. |