image magick

Setup graphicsmagick

Mac users, first download and install GraphicsMagick. In Mac OS X, you can simply use Homebrew
```
brew install graphicsmagick
```
Windows users, you can download the installer from http://www.graphicsmagick.org/download.html
GraphicsMagick-X.X.XX-Q8-win32-dll.exe should work for you.

rename_image.sh x.png

#!/bin/bash
  # Function to check if a program is installed
  function is_installed() {
    command -v "$1" >/dev/null 2>&1
  }

  # Check if imagemagick is installed
  if ! is_installed "convert"; then
    echo "Error: ImageMagick is not installed. Please install it using your package manager."
    exit 1
  fi

  # Get the filename without extension
  filename="${1%.*}"

  # Check if a filename was provided
  if [ -z "$filename" ]; then
    echo "Error: Please provide a filename as an argument."
    exit 1
  fi

  # Rename to x@4x.png
  mv "$1" "$filename@4x.png"

  # Resize to 50% and rename to x@2x.png
  convert -resize 50% "$filename@4x.png" "$filename@2x.png"

  # Resize to 25% and rename to x.png
  convert -resize 25% "$filename@2x.png" "$filename.png"

  echo "Successfully renamed and resized the image."

create a mask

https://blog.kyubuns.dev/entry/2022/12/07/185311

background=$(convert input.png -format %c histogram:info:- | sort -rn | head -n 1 | xargs echo | cut -f 2 -d' ')
convert input.png -fuzz 10% -transparent rgb$background tmp1.png
convert tmp1.png -fill 'rgb(255,255,255)' -colorize 100 -background 'rgb(0,0,0)' -alpha remove output.png

exec_magic.command

OUTPUT="{{filename}}"
PROJPATH="{{path}}"
SANDPATH="{{tmp}}"
BINPATH="{{bin}}"
LOOP={{loop}}
DELAY=50

# 25= 4 fps

export MAGICK_HOME="$BINPATH"
export PATH="$MAGICK_HOME/bin:$PATH"
export DYLD_LIBRARY_PATH="$MAGICK_HOME/lib/"
chmod u+x "$MAGICK_HOME/bin/convert"
convert -loop $LOOP -delay $DELAY "$SANDPATH"/capture_*.png $PROJPATH/"$OUTPUT".gif