Different ways to define color inside a PDF (RGB, CMYK, etc)
The PDF file I have been looking at today has an issue which is more of a Java ‘feature‘ than a PDF bug but it does cover some PDF features so it is worth covering. When you define an ICCColorspace, you can define an alternate Colorspace which can be used to display the data (generally…
Colour can be a complicated topic in PDF because not only can you have lots of different types of color in PDF (Lab, RGB, CMYK, etc), but you can even have different types of RGB and CMYK. This article is part explanation of how color can work in a PDF file and part tutorial on…
Not sure if this is strictly a bug but it is certainly an ‘interesting’ way to use the PDF spec and unduly complex. When you create an image in a PDF, you can also give it an SMask (a stencil which allows you to only show part of the image). So far so good…. Have…
I introduced Color in a previous article and there are lots of different types of Colorspaces to suit all occasions. One of the more complex and powerful Colorspaces is the ICC Colorspace which deserves more explanation. ICCBased colorspace allow the user to include a file in the PDF (a profile) defining the Colorspace values according…
This article is all about color in PDF images, and exactly what the depth of an image means in practice. All PDF images will specify a width, a height, a ColorSpace and the number of bits per color component (a color depth). This is the number of bits used to store each color component for…
