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Signal Processing

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  • $\begingroup$ Is the background always identical? $\endgroup$ Commented Dec 4, 2012 at 21:00
  • $\begingroup$ nearly, differs a bit into darker / brighter. $\endgroup$ Commented Dec 4, 2012 at 21:26
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    $\begingroup$ Well subtracting the background from every image would be a start, making it more uniform: imgur.com/9WhcB $\endgroup$ Commented Dec 5, 2012 at 1:14
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    $\begingroup$ What do you mean? Do you have a picture of the background without any glass? $\endgroup$ Commented Dec 5, 2012 at 2:56
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    $\begingroup$ @DennisJaheruddin I know that an edge is NOT a black line. An edge is defined as a change on intensity/frequency, what means that it's gray values changes more or less rapid. Nevertheless as you may see out of the context, the Canny method won't be the weapon of choice here, because of the background I will get a lot of noise (with Canny). And I can't predict the automatic threshold/sigma. So I need a method which elimates the background, but not the object itself. $\endgroup$ Commented Dec 6, 2012 at 12:34