What is Compression of Captured PDF Document
A captured pdf document is usually the output of a scanner that converts your physical documents into files of the pdf format. Such a file can be extremely large in size, especially because it contains font and image metadata, formatting metadata and the like. this can be cumbersome when sharing such files online, taking up server space and bandwidth. Therefore, ways are required whereby such captured pdf documents can be made smaller in size without losing significant information. This method is called compression of captured pdf document, and it can be lossy, where you lose an amount of data determined by you but get superb compression, or lossless, where compression is less but there is no data loss.
Why Compress the Captured PDF Document
As has been said, a captured pdf document can be huge. Whole encyclopadeias are these days converted into pdf format, and one can imagine the resultant sizes. Although documents need not be specifically for the web, it is however useful to use compacted and compressed portable data including images for various reasons. This is because even if you are not going to transmit your extra large pdf file, still it probably needs to be stored, which will take up considerable size. Therefore, images, text and multimedia all need to be compressed in a lossless or lossy format to reduce file size, whether your pdf document is for online use or offline.
How to Compress PDF
Most of the software available on the Internet for captured PDF document compression focus on the resulting quality of the captured PDF document by the following methods. FLATE and LZW methods focus on compression of text and image data in a lossless format. JPEG 2000 focuses on grayscale and color images. CCITT method focuses on monochrome image types during compression of captured PDF document. Most currently available document readers and professional document creators use software that make sure there is no loss in quality of the images and text.