From [1]:

2021-10-28  7.1.0-13  Dirk Lemstra <dirk@lem.....org>
  * Fix stack overflow when parsing malicious ps image file (report from
    Muhammad Aldo Firmansyah).

2021-10-15  7.1.0-12  <quetzlzacatenango@image...>
  * Fix x64 build.

2021-10-11  7.1.0-11  <quetzlzacatenango@image...>
  * Fix connected component abort trap (reference
    https://github.com/ImageMagick/ImageMagick/issues/4372).
  * Fix possible unitialized values (reference
    https://github.com/ImageMagick/ImageMagick/issues/4379).
  * Fix stack overflow when parsing malicious tiff image file (report from
    Muhammad Aldo Firmansyah).

2021-10-03  7.1.0-10  <quetzlzacatenango@image...>
  * Improved algorithm for automatic calculation of pointsize for caption and
    labels.
  * Support -auto-orient option in the identify utlity.

2021-10-03  7.1.0-9  Dirk Lemstra <dirk@lem.....org>
  * Squash a dump truck load of VisualStudio compiler warnings.
  * Improved algorithm for automatic calculation of word breaks and pointsize
    for caption and labels.
  * Improve wrapping between words and within words (reference

2021-09-17  7.1.0-8  Dirk Lemstra <dirk@lem.....org>
  * Check for `null` in InvokeDelegate() (reference
    https://github.com/ImageMagick/ImageMagick/issues/4225).

2021-09-11  7.1.0-7  Dirk Lemstra <dirk@lem.....org>
  * Fixed incorrect check when module is used as the domain in policy.xml
    that could allow the use of a disabled module. (reference
  * Prevent color reduction merging into one color (reference
    https://github.com/ImageMagick/ImageMagick/issues/4059)

2021-08-21  7.1.0-6  <quetzlzacatenango@image...>
  * Tweak the bilevel image type (reference
    https://github.com/ImageMagick/ImageMagick/issues/4121).
  * Converting from LAB to RGB leads to wrong colors (reference
    https://github.com/ImageMagick/ImageMagick/issues/4105).

2021-08-12  7.1.0-5  Dirk Lemstra <dirk@lem.....org>
  * Added option (-dng:read-thumbnail=true) to read the thumbnail of a raw
    Image and store it as a profile called dng:thumbnail.
  * Heap-based buffer overflow in TIFF coder (alert from Hunter Mitchell).
  * Grayscale image write optimization.

2021-07-17  7.1.0-4  <quetzlzacatenango@image...>
  * Trim no longer returns an empty image on 1-pixel width input (reference
    https://github.com/ImageMagick/ImageMagick/issues/3896).
  * remove virtual canvas offset from difference image.

2021-07-03  7.1.0-3  Dirk Lemstra <dirk@lem.....org>
  * Added option to set the pixel format option of ffmpeg when reading or
    writing a video file with -define video:pixel-format=<value>.
  * system() is not supported under IOS.
  * Accelerate subimage-search with FFT's (contributed by Fred).

2021-06-25  7.1.0-2  <quetzlzacatenango@image...>
  * malloc() corruption fix (reference
    https://github.com/ImageMagick/ImageMagick6/issues/159).

2021-06-19  7.1.0-1  Dirk Lemstra <dirk@lem.....org>
  * Added option to set the vsync option of ffmpeg when reading or writing a
    video file with -define video:vsync=<value>.

2021-06-02  7.1.0-0  <quetzlzacatenango@image...>
  * SVG no longer hangs when handling class in <defs> (reference
    https://github.com/ImageMagick/ImageMagick/issues/3818).
  * Bump minor version (reference
    https://github.com/ImageMagick/ImageMagick/issues/3768)

2021-06-02  7.0.11-15  <quetzlzacatenango@image...>
  * Raise exception for invalid compose:args geometry (reference
    https://github.com/ImageMagick/ImageMagick/issues/3765).

2021-05-20  7.0.11-14  Dirk Lemstra <dirk@lem.....org>
  * Added support for reading and writing 16-bit jxl images.

2021-05-12  7.0.11-13  Dirk Lemstra <dirk@lem.....org>
  * Fixed reading and writing the XMP chunk in a WebP image (reference
    https://github.com/ImageMagick/ImageMagick/discussions/3617).
  * Added support to set the jpeg-xl encoding effort with
    -define jxl:effort=<number>

2021-05-09  7.0.11-13  <quetzlzacatenango@image...>
  * label and caption sanity check is too conservative.

[1] https://github.com/ImageMagick/ImageMagick/blob/main/ChangeLog