Saturday, May 19, 2012

Discussion Point - Alana Peddie


Which file format do I use?

I have to an extent understood the basics behind file formats but I have never really grasped which is for what purpose. Through trial and regular error I have gained an understanding of which file formats to steer clear of and which the printer likes when it is time to print. As a rule I tend to stick to the PDF as typically they seem to give the best general results but for actual images what is the suitable format to use?
A bit of research has me understand that there are graphic formats suitable for printing and those for on-screen viewing  or online publishing and within each group there are formats  better suited to particular tasks than others.
Generally use GIF, JPEG or PNG for online publishing and use EPS and TIFF for print publishing.

More specifically a:
GIF is for simple Web graphics having limited colours, they are very small fast loading graphics for Web.
JPEG is best for photos when you need to keep file size small, they are not suitable for images with text, large blocks of colour or simple shapes as crisp lines will blur and colours shift.
PNG is a small file with no loss in quality.
EPS very suitable for high resolution printing of illustrations though they are known to be a tricky format to work with
TIFF produces large files with no loss in quality.

This is a useful link to a more in depth understanding of picture file types:

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