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Recent Posts
- Computing gradients on grids of pixels and voxels – forward, central, and… diagonal differences February 28, 2021
- Bilinear down/upsampling, aligning pixel grids, and that infamous GPU half pixel offset February 15, 2021
- Is this a branch? January 18, 2021
- Converting wavetables to Ableton Operator AMS waves January 5, 2021
- Why are video games graphics (still) a challenge? Productionizing rendering algorithms December 27, 2020
Categories
Tag Archives: optimizations
Is this a branch?
Let’s try a new format – “shorts”; small blog posts where I elaborate on ideas that I’d discuss at my twitter, but they either come back over and over, or the short form doesn’t convey all the nuances. I often … Continue reading
Posted in Code / Graphics
Tagged assembly, cpu, gpu, optimizations, profiling, programming, simd
6 Comments
Separate your filters! Separability, SVD and low-rank approximation of 2D image processing filters
In this blog post, I explore separable convolutional image filters: how can we check if a 2D filter is separable, and how to compute separable approximations to any arbitrary 2D filter represented in a numerical / matrix form using SVD. Continue reading
Posted in Code / Graphics
Tagged algorithms, approximation, blur, bokeh, depth of field, graphics, image processing, linear algebra, numpy, optimizations, postprocessing, python
9 Comments
