For Separation colors, the equivalents are retrieved by running the color value through the alternate color function using the PDApplyFunction() API. float inVal[4], tintTrans[4]; ... /* If this element has a GState, retrieve the Color Information... Read More

PDF2IMG does not provide color separation. But you can use the Adobe PDF Library to create color-separated output files. The process is demonstrated using the Adobe PDF Library sample programs, CreateSeparations for C++ and EPSSeparations for .NET or... Read More

Suppose you want to create only a cyan or magenta color separation from an image in a PDF document. PDPageMakeSeparations() will provide PostScript separations. Datalogics offers several sample programs that demonstrate working with color separations... Read More

The Output Intent is an optional entry in the document catalog, or root dictionary. It is an array of OutputIntent dictionaries that describe the color reproduction characteristics of possible output devices. The purpose of the OutputIntent is to... Read More

The PDPrefSetWorkingRGB, PDPrefSetWorkingCMYK and PDPrefSetWorkingGray API settings tie the nominal DeviceRGB, DeviceCMYK and DeviceGray color gamut (respectively) to a specific ICC profile’s color gamut. Putting it another way, the designated... Read More

A single PDF document can support a wide variety of elements using different color models. Often a PDF file is produced and saved with elements in the DeviceRGB, DeviceCMYK and DeviceGray spaces that have an associated ICC profile. An element (such... Read More

The Adobe Color Engine (ACE) and the Windows Image Color Management (ICM) are two APIs that serve similar purposes but in different environments. ACE is required to set up and modify ICC profiles in PDF documents and the APDFL environment. ICM is... Read More

The iccProfilesDir and the iccProfilesStandardFolders are both parameters of NSClientData. NSClientData is an API that points to private client data. Private client data is a set of parameters that allow you to pass custom values to PDF Converter... Read More

Color profiles are standards for managing colors, used to guarantee that the colors for text or graphics in a file remain the same regardless of the hardware or software used to display, edit, or print that file. A color profile is usually included... Read More

Both PDF2IMG and Adobe Acrobat offer an Overprint Preview (OPP) option. Sometimes in printing a color in a graphic or image is printed directly on top of another color. The color on top can be opaque, and completely cover, or “knock out,” the... Read More