|[mmdLeaf] [Up] [mmdPcb]||Demonstrations|
The input image is a gray-scale image of a microelectronic circuit. The relevant objects in this image are vertical metal stripes. These stripes have some irregularities that should be detected. Our procedure takes the residues of a gray-scale closing and filter (by size) the threshold of the residues.
Closing of the image by a vertical line of length 25 pixels. Then subtract it from the original. The sequence closing-subtraction is called closing top-hat. (This could be executed in a single command: c=mmCloseth (a,mmSeline (25,90));).
Subtraction of the closing from the original is called closing top-hat. It shows the discrepancies of the image where the structuring element cannot fit the surface. In this case, it highlights vertical depression with length longer than 25 pixels.
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