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location Munich, Germany
age 36
visits member for 2 years, 9 months
seen 6 hours ago

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


1d
comment Usage of @ symbol in Mathematica
Have you seen this? mathematica.stackexchange.com/questions/18393/…
Oct
25
comment how to speedup subpixel registration
The simplest way is to replace (# + {x, y}) & with TranslationTransform[{x, y}] - that makes it about 10x faster on my PC (I'm guessing ImageTransformation is optimized for TransformationFunctions). Replacing NMinimize with FindMinimum makes it 10x faster, again. You can probably make it faster if you carefully think about how ImageTransformation interpolates between pixels (there might even be a closed form solution?), but that's a lot more work for 0.2 seconds.
Oct
24
awarded  Enlightened
Oct
23
awarded  Nice Answer
Oct
23
answered Intersecting parabolas in an image
Oct
20
answered Nothing happens when I click the mouse clicked on my graphics
Oct
16
asked How does MapThread work with Associations
Oct
16
awarded  Good Question
Oct
11
answered Counting the number of instances where items at the same position in two matrices are equal?
Sep
29
comment Curve fit based on minimal data
According to the wikipedia link, the polar form is just $r=b+a\cos\theta$ - so maybe you could convert your points to polar coordinates and use Fit?
Sep
26
awarded  Nice Answer
Sep
24
awarded  Autobiographer
Sep
22
comment Is there a CDF Player for Mathematica 10?
But you won't tell us where to find it?
Sep
22
asked Is there a CDF Player for Mathematica 10?
Sep
13
awarded  Nice Answer
Sep
5
answered How to understand the process of ListCorrelate when it in two-dimensional condition?
Sep
5
comment Compose one image over another
You can use ImageApply to apply a function like Min pixel-wise. Or turn the images to normal arrays using ImageData and use MapThread.
Sep
4
answered Are there ways to create local variables analogous to a local variable in C++ and other languages?
Sep
4
comment Are there ways to create local variables analogous to a local variable in C++ and other languages?
Maybe I'm missing something. Isn't that exactly what Module does?
Aug
31
comment ImageTransformation: polar to cartesian
@paw: The black dot is there because the polar image contains no data for that location. If you use 0 in the DataRange of the inverse transform, but used 1 in the PlotRange of the polar transform, the result will be slightly skewed (by 1 pixel at the center). You can either use 0 for both, or use Padding -> "Fixed" to get rid of the black dot in the center.