meta user
network profile
| bio | website | simonwinder.com |
|---|---|---|
| location | Seattle | |
| age | ||
| visits | member for | 1 year, 2 months |
| seen | Mar 6 at 1:07 | |
| stats | profile views | 0 |
I am a software developer and science researcher who is a specialist in computer vision. I worked for Microsoft Research for many years. Now I am an independent consultant and I am starting a robotics company. I work on iOS, OpenGL platforms and also on Windows. I have lots of experience writing fast code using SSE, GPU etc.
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Mar 5 |
comment |
Finding a simple spline-like interpolating function OK well you'll be pleased to know that your answer is now incorporated into my iPad app. |
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Mar 5 |
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Finding a simple spline-like interpolating function Actually my previous statement was false as I realize that introduces a singularity at $\alpha = 0.5$. (Its amazing how little appears on a screen when you have Infs in a vertex shader.) And I guess robotbugs could be both:) |
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Mar 5 |
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Finding a simple spline-like interpolating function OK thats great because its just $\frac{kx}{x+c}$ which is very few math operations. I can precompute the two constants. |
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Mar 5 |
accepted | Finding a simple spline-like interpolating function |
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Mar 5 |
awarded | Commentator |
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Mar 5 |
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Finding a simple spline-like interpolating function You have a mix of $k$ and $x$ in there. Are they supposed to be the same variable? |
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Mar 5 |
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Finding a simple spline-like interpolating function Also what did you use to display such a nice graph on here? I was wondering how to get a diagram in my original post. Last time I tried to post something though I did not have enough standing on the forum to post images. |
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Mar 5 |
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Finding a simple spline-like interpolating function Thanks, thats exactly the form of curve I was looking for. I can certainly live with a square root function. Many thanks! |
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Mar 5 |
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Finding a simple spline-like interpolating function I'm currently using code: if(d<alpha) d = (1.0-alpha)*d/alpha; else d = (1.0-alpha)+(d-alpha)*alpha/(1.0-alpha); to do a simple 2 piece linear interpolation. The point of my question is finding something smoother and possibly faster to compute. |
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Mar 5 |
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Finding a simple spline-like interpolating function I tried using a b-spline with three control points at $(0,0)$, $(\alpha,1-\alpha)$, and $(1,1)$ and it looks ok when plotted but the problem is its in a parametric form depending on $t$ and getting a simple $y=f(x,\alpha)$ out of it is painful. |
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Mar 4 |
asked | Finding a simple spline-like interpolating function |
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Sep 22 |
revised |
Minimize $||Ax-b||$ but for $A$, not $x$ added 2 characters in body |
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Sep 20 |
accepted | Minimize $||Ax-b||$ but for $A$, not $x$ |
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Sep 19 |
awarded | Scholar |
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Sep 19 |
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Minimize $||Ax-b||$ but for $A$, not $x$ OK thats helpful, thanks. |
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Sep 18 |
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Minimize $||Ax-b||$ but for $A$, not $x$ I corrected the text to clarify the L2 norm. |
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Sep 18 |
revised |
Minimize $||Ax-b||$ but for $A$, not $x$ added 1 characters in body |
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Sep 18 |
awarded | Editor |
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Sep 18 |
awarded | Supporter |
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Sep 18 |
comment |
Minimize $||Ax-b||$ but for $A$, not $x$ This is useful but I did intend the L2 norm, which is consistent with the second matrix equation. |
