One of the powerful features of the PDF file specification is the support for transparency in the Canvas. When an image is drawn on the page, the image can have an alpha setting which defines how transparent the image is. The value is between 0 and 1 (where 0 is totally invisible and 1 has no transparency). Transparency is often used for special effects like adding a watermark – draw an image with a 0.2 transparency setting or less.
Click here to see all the articles in the PDF to HTML5 conversion series.
Did you know...
IDRsolutions offers a whole range of online file converters to convert PDF and Microsoft Excel, Word and Office Documents to HTML5, SVG or image formats?
It is free to use for single file conversions and also includes Developer links if you want to use our commercial software for bulk conversions. Find out more on this page