9,910 reputation
22149
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location Munich, Germany
age 36
visits member for 2 years, 6 months
seen 17 mins ago

I work at a small mechanical engineering company, where I develop software and image processing algorithms for camera-based inspection machines.


May
30
comment Negative probability?
That's weird: I'm using MMA 9.0.1, Windows, 64bit, and I get \[Pi]^3/840.
May
29
revised Intersecting/Overlapping Image Elements Counts?
added 1899 characters in body
May
29
answered Intersecting/Overlapping Image Elements Counts?
May
20
revised Rebuild a polygon so it doesn't self intersect
added 3 characters in body
May
19
comment Rebuild a polygon so it doesn't self intersect
@Öskå: You're right, I forgot that SortBy treats exact values and machine-precision values differently. Try using N@ArcTan[... or N[pts] instead, then SortBy should sort them properly.
May
19
comment Rebuild a polygon so it doesn't self intersect
It's weird that FindShortestTour doesn't remove intersections as a post-processing step. IIRC, finding&removing intersections is a O(n*log(n)) operation if done right, and it's guaranteed to make the tour shorter.
May
19
revised Rebuild a polygon so it doesn't self intersect
deleted 21 characters in body
May
19
answered Rebuild a polygon so it doesn't self intersect
Apr
28
comment Generating x,y coordinates for an edge detection
@s.s.o: Oops, you're right; I didn't realize there was a shadow. On the other hand, I just answered this question because I didn't notice it was months old (and probably abandoned by the OP). Adding "image processing cleanup code" that will only work for this single image anyway seems kind of pointless now.
Apr
27
awarded  Necromancer
Apr
27
answered Generating x,y coordinates for an edge detection
Apr
16
awarded  Nice Answer
Apr
14
comment Machine precision infinity
@chuy: $MaxMachineNumber is the largest finite number the machine's native floating point type can represent. But IEEE floating point numbers can also represent plus and minus infinity. I guess he means those.
Apr
12
comment Is it possible to get AltGr key to work in Math.exe?
Happens on my PC too, only in math.exe, not in other console processes. It seems to ignore num-block keys, too, even if num-lock is on. I'd say math.exe is completely unusable (interactively) with a non-us keyboard. Dumb question: Why use the console interface in the first place? Why not use the more comfortable notepad interface?
Apr
11
answered Programming paradigm change
Apr
10
comment Fitting piecewise functions
I think NonlinearModelFit works my minimizing some cost function (e.g. total squared error), but the cost function can't be evaluated if your piecewise function doesn't return a value for some values of x. Have you tried using something like {(a+b)/2,A<x<B} as a fallback? Alternatively, you could come up with your own cost function and just optimize that.
Apr
9
comment Line Intensity Profile From Image
@VitaliyKaurov: I always thought an intensity profile was the sampled intensity values along a path (in this case, a line). Maybe I misunderstood the term. What would be your definition?
Apr
9
answered Line Intensity Profile From Image
Apr
7
awarded  Nice Answer
Mar
28
answered Importation multiple dcm images