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ImageMagick version 7 has been released. We encourage you to migrate your
workstreams to version 7. However, we recognize a significant version 6 user
community. As such, the ImageMagick development team is committed to maintain,
but not enhance, version 6 at least until 2028 and possibly beyond.

We discovered a bug in the pseudo-random generator prior to ImageMagick
6.9.10-81, the first 3 values repeated because the random state was not
initialized properly. As a consequence of the fix, expect a different
numerical sequence when seeding (-seed).

ImageMagick best practices strongly encourages you to configure a security
policy that best suits your local environment.

The ImageMagick development process ensures a stable API and ABI. Before each
ImageMagick release, we perform a comprehensive security assessment that
includes memory error, thread data race detection, and continuous fuzzing
to detect and prevent security vulnerabilities.

As an analog to linear (RGB) and non-linear (sRGB) color colorspaces, as
of ImageMagick 6.9.9-29, we introduce the LinearGray colorspace. Gray is
non-linear grayscale and LinearGray is linear (e.g. -colorspace linear-gray).

Want more performance from ImageMagick? Try these options:

add more memory to your system;
  add more cores to your system;
  reduce lock contention with the tcmalloc memory allocation library;
  push large images to a solid-state drive, see large image support.

If these options are prohibitive, you can reduce the quality of the image
results. The default build is Q16. If you instead use a Q8 build, you use half
the memory The tradeoff is reduced precision. For a Q8 build of ImageMagick,
use this configure script option: --with-quantum-depth=8.

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