It seems like a lot of folks are struggling with the size of scanned PDFs. Below are excerpts from two emails I received recently:. What can I do to make these smaller in Acrobat? I have to eFile [with the Federal Court] and am having to split the filings into many segments to go through the [Court] gateway.
How to reduce the size of a PDF using preview on a Mac
The issue seems to be with documents that are scanned on our network scanner. PDFs produced directly from Word are a lot smaller.
Is there some trick to reduce the size of scanned files? Lossy compression makes some hopefully non-noticeable visual trade-offs to further reduce file size. Ideally, you would control all of the above factors yourself by scanning at dpi, black and white and using an efficient compression algorithm.
The Best---Reduce PDF Size on Mac without Losing Quality
Unfortunately, you many not have that option. Many desktop and network scanners offer limited or confusing options— or— the scanned PDFs arrived from outside your firm.
Legal Scanning Recommendations In almost all situations, scan at dpi, black and white. The Optimize Scanned Image feature performs various image clean-up tasks de-skewing, edge enhancement and also nicely compresses files.
Reduce the file size of your PDF
For dpi black and white scans, only options a, b and f result in different file sizes. The PDF Optimizer can be used to analyze and selectively compress documents.
The window above reflected the state of a 4-page scanned document: A Total file size about K B Over K was allocated to images! Color Space Color and grayscale files result in much larger files than black and white files. Physical dimensions of the scanned page A legal-size scan will be larger than a letter-size scan, with all other factors being equal.
Compression Raw scan data can be compressed to make it smaller. Compression Types.
All rights reserved. Lossless compression retains the exact appearance of the original. JPEG is a common lossy compression method.
A lossy compression scheme which often does a good job on typical legal documents.