ImageMagickで円形に広がるアニメーションGIFを作成する

ImageMagickで円形に広がるアニメーションGIFを作成するには、
以下のバッチファイルを実行します。

rem 環境によって変えてね
set im=C:\Progra~1\ImageMagick-6.3.3-Q16

%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 50,50" -negate ) -background #ffffdd -compose screen -composite f1.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 45,44" -negate ) -background #ffffdd -compose screen -composite f2.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 40,40" -negate ) -background #ffffdd -compose screen -composite f3.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 35,35" -negate ) -background #ffffdd -compose screen -composite f4.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 30,30" -negate ) -background #ffffdd -compose screen -composite f5.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 25,25" -negate ) -background #ffffdd -compose screen -composite f6.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 20,20" -negate ) -background #ffffdd -compose screen -composite f7.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 15,15" -negate ) -background #ffffdd -compose screen -composite f8.png
%im%\convert.exe -size 100x100 sample4.jpg ( xc:none -channel RGBA -fill #ffffffff -background none -draw "circle 60,60 10,10" -negate ) -background #ffffdd -compose screen -composite f9.png
%im%\convert.exe f1.png f2.png f3.png f4.png f5.png f6.png f7.png f8.png f9.png sample4.jpg -set delay 20 -loop 0 sample62.gif

元画像(sample4.jpg)

出力画像(sample62.gif)