So, you have a provider that allows you to install Perl programs, but not Perl modules? Considering that you can use a module as a program, and a program as a module, that shouldn't stop you from installing a module. Or else, shell out to the tool that does the cropping. Or lift the code from a module that you want to use, and put it in your code.
Of course, I could tell you how - but that would be in the form of another module....
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