Some answers I like:
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- Problem with Precision floating point operation in C
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- Transforming captured co-ordinates into screen co-ordinates
- How to use SIFT algorithm to compute how similiar two images are?
- Shortest path to transform one word into another
- Skewing an image using Perspective Transforms
- Code Golf: Build Me an Arc
- Plotting Bessel function in MATLAB
- Incrementing values in a sparse matrix takes very long