| DLAngle | Representation of an angle in a DLImage |
| DLBaseImage | An abstract base class for all image types |
| DLBitsPerPixelConverter | A collection of algorithms to convert among binary, grayscale and color images |
| DLBlur | Blur an image |
| DLBMPImage | BMP image I/O class |
| DLCartesian | Cartesian Image Calculation |
| DLColor | A class to represent colors |
| DLColorCounts | Stores JPEG color palette information |
| DLComponent | Connected component object |
| DLConnectedComponents | Calculates and stores connected components of an DLImage |
| DLConnectedComponents::fiterator_base< COMP, CVEC, CVECITER, IVEC, IVECITER > | Class for iterating over all the filtered connected components |
| DLContour | Contour Computation |
| DLDatarun | Stores pixel run information |
| DLDilate | Dilate an image |
| DLDocument | Representation of a document |
| DLErode | Erode an image |
| DLException | Error message object used to deliver error messages in DOCLIB |
| DLFileBasedIO | DOCLIB file-based I/O Stream |
| DLGIFImage | GIF image I/O class |
| DLHistogram | Calculate the Histogram of an image |
| DLImage | The DLImage object is the entry point for performing image processing capabilities supported by DOCLIB |
| DLImageFactory | A singleton object which handles loading and saving of images for DLImage |
| DLImageHead | Image header object for DLImage |
| DLImageStats | Image statistics object |
| DLIOStream | DLIOStream is a Base class for the DOCLIB I/O package (i.e. Read/Write file, Read/Write memory and etc.) |
| DLJPGImage | JPEG image I/O class |
| DLLineShape | An object to represent a line segment |
| DLLogger | Debug, informational, and error message logging |
| DLMask | Mask an image |
| DLMedialAxis | Image Medial Axis Transform |
| DLMemoryBasedIO | DOCLIB memory based I/O Stream |
| DLNormalize | Normalize an image |
| DLPage | Representation of a page within a DLDocument |
| DLPBMImage | PBM image I/O class |
| DLPNGImage | PNG image I/O class |
| DLPoint | Representation of a point on a DLImage |
| DLPointList | Represents a list of points; used by DLSkew |
| DLPolar | Cartesian-to-polar conversion |
| DLPPMImage | BMP image I/O class |
| DLProfile | Calculate a projection profile of an image |
| DLRectShape | An object used to represent a rectangle |
| DLShape | Abstract base class for all shape types |
| DLSharpen | Sharpen an image |
| DLSingletonDestroyer< SINGLETON > | An object used to destroy singleton objects |
| DLSkeleton | Image skeletonization |
| DLSkew | Skew detection algorithm |
| DLStrokeWidth | Document image stroke width calculation |
| DLTagList | Metadata tag container object |
| DLTextImage | DLImage representation of a text image |
| DLTIFFImage | TIFF image I/O class |
| DLUtils | General utility class |
| DLVersions | Home to the static method dlPrintAllVersionInfo() that can be used to print out all available version information |
| DLZone | General bounding box container for objects on a document page |