Concat two string.
Change an int value to string value.
Wait until the user key-in.
Read target file path from a FilesObject create by [ReadFilesFromFolder] function.
Read file paths under a folder.
Set the count to a for loop.
Get the count in a for loop.
End a for loop.
Start a for loop.
Transform a string variable to a json variable.
Waiting this program N second.
Print a string to an image.
Multiplied an double value to an image.
Minus an int ( gray value ) to an image.
Use a pattern to match an image, and show the difference.
Draw rectangles to an image.
Divided an double value to an image.
Add an int ( gray value ) to an image.
Create an empty image.
Conversion input image according to target image with mean gray value.
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