What's your question?
Are you asking how to accomplish this in Microsoft Access VBA? (If so, it
would depend on the scanner software and APIs {Application Programming
Interface} available for your scanner to execute the scan.)
Are you expecting to automate the cropping process without human/user
interaction? (If so, it's unlikely that you can accomplish it in Access, nor
most other software)
What are your requirements for determining/creating the file name to be used
in the "specific folder"? Microsoft Access can write a file, but normally
stores information in databases. Named files are stored in folders, not just
random chunks of binary data.