| fipImage | A class used to manage all photo related images and all image types used by the library |
| fipMemoryIO | Memory handle |
| fipMetadataFind | Metadata iterator |
| fipMultiPage | Multi-page file stream |
| fipObject | Abstract base class for all objects used by the library |
| fipTag | FreeImage Tag |
| fipWinImage | A class designed for MS Windows (TM) platforms |
| tagFICOMPLEX | Data structure for COMPLEX type (complex number) |
| tagFIRGB16 | 48-bit RGB |
| tagFIRGBA16 | 64-bit RGBA |
| tagFIRGBAF | 128-bit RGBA Float |
| tagFIRGBF | 96-bit RGB Float |