ImageMagick

ImageMagick(IM) is an image processing CLI tool, it can dramatically improve the productivity in some situations:

• the operation in math meaning is simple, but does need many user actions when using a GUI software like PS, for example, resize, crop, format transformation, etc.
• the operation is not normal in usual image software, like create binary image, extract edges, etc.
• there are many files to operate on

Of course, it's not suitable on the opposite situations.

Especially, what I want to emphasis is DO NOT try to use IM do digital design, it's tricky and unnecessory, for detail and feedback are very important in design, both are lacked in IM.

key point	note
*.jpg	a shell featuer
-append +append	-+ can affect the behavior
-canny	yes IM supports canny edge detection algorithm
-gravity	change coordinate system as well as anchor point convention
-colorspace Gray	convert color image into gray
rose:	an internal image in IM
xc:white / canvas:white	IM use this style to notate pure color image, the role is just like an real image, in fact, the position of it is where images usually stay
info:	fake image for output text info about image