Comments (3)
There is actually a linear-complexity blur already implemented in Rust, where execution time is independent of blur radius: https://github.com/fschutt/fastblur
I've recently optimized the implementation by a further 2.5x, but not all of my PRs are merged yet, so you'll need to either nag the maintainer to merge them or use my fork.
That repo is more or less a toy, feel free to copypaste it wholesale to imageproc and continue development over here.
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Thanks for the link. (Turns out I didn't get round to looking at this after all. I'm still interested in implementing this functionality, but I'm not sure when it'll get done - if anyone else wants to give this a try they're not going to be stepping on my toes.)
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resvg
crate recently got the linear complexity algorithm linked above to production quality. It now supports alpha channel as well as all color formats that shuffle RGBA. Now it also matches blur rendering in Chrome, so it appears to be correct.
If you want to integrate that algorithm in imageproc, I suggest backporting those changes into fastblur crate as described here and then using that crate from both imageproc and resvg.
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Related Issues (20)
- How does this crate compare to magick-rust? HOT 2
- Try using doc_auto_cfg to automate addition of docrs attributes
- Rename `imageproc::map::map_colors()` to `map_pixels()` HOT 2
- Another doc-macro for parallel variations of functions?
- `Rect` refactors HOT 2
- Add filter benchmarks for kernels larger than 3x3
- Add hardcoded filter3x3 function to benchmark current generic filter function against HOT 19
- Switch `imageproc::Rect` to `image::Rect` HOT 3
- `Laplacian` from `master` is wrong HOT 4
- Check for any functions missing tests
- Use `Kernel` by `ref` HOT 2
- Document release process
- Agree a sensible API for filtering so we can reduce the risk of frequent breaking changes to signatures HOT 3
- Fix filter performance vs simple hardcoded implementation
- Add Tags for all previous releases where possible HOT 2
- Decide module layout for new imageops functions HOT 1
- how encode drawed image to [u8] ? HOT 6
- Rounded corners on rectangles and images HOT 4
- Projection matrix for rotation is weird
- Add `#[must_use]` to all non-mut image processing functions
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