Runtime Error: cv::medianBlur() crush every time in opencv 4.1.2

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System information (version)

• OpenCV => 4.1.2
• Operating System / Platform => macOS Catalina, Version 10.15.1
• Compiler => Xcode, Version 11.2.1 (11B500)

Detailed description

I installed opencv4 through homebrew. Unfortunately, cv::medianBlur() crushed every time it runs. I checked the input variable format, kernel size as the doc says. I am sure the problem is not caused by these reasons. I think the problem is from the opencv lib itself. The homebrew installation process summary is as follows:

==> Summary
🍺 /usr/local/Cellar/opencv/4.1.2: 753 files, 228.2MB
==> Caveats
==> cmake
Emacs Lisp files have been installed to:
/usr/local/share/emacs/site-lisp/cmake
==> openblas
openblas is keg-only, which means it was not symlinked into /usr/local,
because macOS provides BLAS and LAPACK in the Accelerate framework.
For compilers to find openblas you may need to set:
export LDFLAGS="-L/usr/local/opt/openblas/lib"
export CPPFLAGS="-I/usr/local/opt/openblas/include"
For pkg-config to find openblas you may need to set:
export PKG_CONFIG_PATH="/usr/local/opt/openblas/lib/pkgconfig"
==> gettext
gettext is keg-only, which means it was not symlinked into /usr/local,
because macOS provides the BSD gettext library & some software gets confused if both are in the library path.
If you need to have gettext first in your PATH run:
echo 'export PATH="/usr/local/opt/gettext/bin:$PATH"' >> ~/.bash_profile
For compilers to find gettext you may need to set:
export LDFLAGS="-L/usr/local/opt/gettext/lib"
export CPPFLAGS="-I/usr/local/opt/gettext/include"
==> [email protected]
A CA file has been bootstrapped using certificates from the system
keychain. To add additional certificates, place .pem files in
/usr/local/etc/[email protected]/certs
and run
/usr/local/opt/[email protected]/bin/c_rehash
[email protected] is keg-only, which means it was not symlinked into /usr/local,
because openssl/libressl is provided by macOS so don't link an incompatible version.
If you need to have [email protected] first in your PATH run:
echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.bash_profile
For compilers to find [email protected] you may need to set:
export LDFLAGS="-L/usr/local/opt/[email protected]..."
export CPPFLAGS="-I/usr/local/opt/openssl@1...."
For pkg-config to find [email protected] you may need to set:
export PKG_CONFIG_PATH="/usr/local/opt/opens..."
==> unbound
To have launchd start unbound now and restart at startup:
sudo brew services start unbound
==> readline
readline is keg-only, which means it was not symlinked into /usr/local,
because macOS provides the BSD libedit library, which shadows libreadline.
In order to prevent conflicts when programs look for libreadline we are
defaulting this GNU Readline installation to keg-only.
For compilers to find readline you may need to set:
export LDFLAGS="-L/usr/local/opt/readline/lib"
export CPPFLAGS="-I/usr/local/opt/readline/include"
For pkg-config to find readline you may need to set:
export ...