How make auto trim?

[mic]

Hi ! nconvert is best!
And how i make crop borders of any image? White, black... without exact color. Its possible?
And else, what is
-autocrop tol r g b
?

[xnview]

Hi ! nconvert is best!
And how i make crop borders of any image? White, black... without exact color. Its possible?
And else, what is
-autocrop tol r g b
?

-autocrop is for that

[mic]

-autocrop is for that

I dont know what is the "tol" and "r g b" its border color?
Can you show example please.

[xnview]

-autocrop is for that

I dont know what is the "tol" and "r g b" its border color?
Can you show example please.

tol is the tolerance value, and rgb is the color to trim (border)