Prepressly — third-party open-source components
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Prepressly runs entirely in your browser and bundles one open-source library,
distributed under a permissive license that allows commercial redistribution
with attribution. This notice satisfies that requirement.


1) pdf-lib  —  vendor/pdf-lib.min.js
   Create and modify PDF documents in JavaScript.
   License: MIT.
   The minified build also bundles third-party components distributed under
   the MIT and Apache License 2.0 (their copyright/license notices are
   retained inside the minified file).
   https://github.com/Hopding/pdf-lib


Image-processing algorithms in Prepressly's own line-fix pipeline (not third-party code):
  - Sauvola local adaptive thresholding (Sauvola & Pietikainen, 2000),
    integral-image implementation, producing a soft per-pixel ink amount
    so darkened edges stay anti-aliased.
  - A flat-region (low-variance) guard that suppresses scanner / paper speckle
    while leaving high-contrast strokes intact.
  Strokes are darkened in place; the original line weight, detail and filled
  areas are preserved. (An earlier centerline/vectorization build was removed
  because it thinned strokes and dropped detail on real-world line art.)

The full text of the MIT License is reproduced below; the Apache License 2.0
text is included in full inside vendor/pdf-lib.min.js.

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MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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