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| bio | website | |
|---|---|---|
| location | Munich, Germany | |
| age | 35 | |
| visits | member for | 1 year, 4 months |
| seen | 7 mins ago | |
| stats | profile views | 443 |
I work at a small mechanical engineering company, where I develop software and image processing algorithms for camera-based inspection machines.
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1d |
comment |
“Save Graphic As…” does not include plot legends If you want to export it as a raster image, you can always use Rasterize. |
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2d |
awarded | Good Answer |
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May 22 |
awarded | Nice Answer |
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May 21 |
answered | How can I detect an ellipse in a photo? |
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May 21 |
comment |
How can I detect an ellipse in a photo? I'm not sure about the hough transform: an ellipse has 5 degrees of freedom, that's a huge parameter space to update for each point. |
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May 15 |
awarded | Good Answer |
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May 15 |
awarded | Nice Answer |
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May 14 |
revised |
Finding areas of beings in microscopic image Fixed another bug... |
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May 14 |
revised |
Finding areas of beings in microscopic image added 221 characters in body |
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May 14 |
revised |
Finding areas of beings in microscopic image added 63 characters in body |
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May 14 |
answered | Finding areas of beings in microscopic image |
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May 12 |
comment |
Does LinearModelFit perform an ordinary linear regression (least squares)? @Rojo: Thanks! That's exactly what I wanted to know. |
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May 9 |
comment |
How can I return the color at a coordinate in an image? This gives the wrong values! The values in p are coordinates, so they are 0-based, start at the bottom-left corner and are stored in x/y order. Extract expects array indices, which are 1-based, start at the top-left corner and are in row/column (i.e. y/x) order. So the values you get are transposed, upside down and shifted by one pixel. |
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May 7 |
comment |
Why is arithmetic faster for inexact arithmetic? At least for inexact arithmetic, I'm pretty sure Mathematica never looks for the roots of a polynomial (because that's not numerically stable). It probably uses an iterative method like Jacobi's. |
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May 7 |
comment |
Does LinearModelFit perform an ordinary linear regression (least squares)? Is there a reason why you use RandomReal[NormalDistribution[] instead of RandomVariate[NormalDistribution[], ? Can RandomReal work with any distribution? If yes, what's the point of RandomVariate anyway? |
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Apr 30 |
comment |
How to compare graphical objects? What data do you have? A list of polygons? An image? A set of points? With or without outliers? Do you know point correspondences between the compared objects? Maybe FindGeometricTransform could help? |
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Apr 29 |
comment |
How to compare graphical objects? Sort the lengths of the sides and compare them? |
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Apr 24 |
comment |
looking for a generalised Hough Transform function or a least a function to locate circles @s.s.o: A hough transform can find circles even if they're not connected components (and circles detected e.g. using EdgeDetect are often not connected). But I think MMA has no built in generalized or circle hough transform. It would be relatively straightforward (but slow) to simulate it by convolving the image with circles with different radii. |
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Apr 22 |
comment |
Get Coordinates in Image Processing +1. Instead of Dilation, you can use the ComponentMeasurements overload that takes a label matrix instead of an image: ComponentMeasurements[ImageData[Binarize[i]], "Centroid"]. That way, you'll always get a single component, because the label matrix only contains 0 and 1. |
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Apr 19 |
answered | Rotate a grid, made up of lines, so that it aligns with the xy axes |
