Why Should You Compress Images in PDF Files?
PDF files are generally bulky. Scanned PDF documents contain images and they occupy a lot more space and make it difficult to transfer them. Downloading PDF documents with images is an up-hill task. Uploading such PDF documents won't be easy either. Image PDF compression is the only ideal option to solve the problem. With image PDF compression done on your file, functions like transmission, maintenance of original appearance of the document and manipulation of files for web-viewing becomes less tedious.
Image PDF Compression Techniques
There are many different image PDF compression techniques used for different purposes. Each compression technique makes use of a set of pre-defined compression algorithms which have a prototype by which the files are compressed. Some of the commonly used compression techniques are JPEG compression, JPEG2000, TIFF, FAX Group 4 and JBIG2 compression. JPEG compression is used mainly for digital images. However when used for scanned PDF documents, it is not all that effective. Likewise, JPEG2000 also works better on digital photos than on scanned documents. TIFF can compress huge TIFF images in PDF documents and saves space considerably. It compresses in a lossless fashion. FAX Group 4 and JBIG2 also compress images to a good extent with greater compression ratio than rest of the compression techniques. Layered compression is by far the best suited compression method for PDF documents.
Compression Software and Where to Find Them
Search engines can answer any of your questions and this one too. You can find a number of image PDF compression software on the internet. Some are available for free while some are paid versions. Image editing tools will do the trick of compressing images without spoiling the resolution and image quality. There are trial versions available. If you are satisfied with it, you can go for the paid versions. Open source software that compress images for enclosure in PDF are also available. The local software market might have quite a collection of compression software which can be bought after testing. Trial testing software with limited usage downloads is the safest way to go ahead, especially if you are looking to buy specific software to match your scanning needs.