The Need to Reduce the Size of a PDF:
You have a document to send to your client 2000 miles away. So what do you do? You scan it and try to attach it to your email; but the attachment fails due to the large size of the file. The first thing that hits your mind is how do I reduce the size of a PDF? The primary reasons behind the difference in sizes of a scanned file and a searchable PDF file are resolutions of the scanned files, size of the page scanned and the colour of the pages. Due to scanning a lot of redundant data acquires space in the file hence making it a large one.
How to Reduce the Size of a PDF File:
One can use two types of compression techniques for PDF files. The first one is Lossy types with output formats including JPEG. The Lossy type compression reduces the file by a large margin but it does so by compromising on the quality of the content in the file. The appearance of the file becomes degraded and cannot be enhanced once the compression is done. Lossless type of compression is another type of compression that retains the texture of the file and reduces the file size by a considerable amount. Thus weighing the need between quality and size one should select the proper software to reduce the size of a PDF file.
Compression for Various Types of PDF Files:
You can optimize your PDF files by using Optimize Scanned Image from Adobe that allows the user to de-skew the file and also enhance the edges. You can adjust your needs of quality and size accordingly here. PDF Optimizer from Adobe allows the user to compress parts of the file like images, fonts and structures according to one's need.