The ImageGear toolkit is divided into separate libraries, called components, that contain namespaces such as ImageGear.Core, ImageGear.Formats, ImageGear.Processing, etc. The following diagram illustrates their relationship: 

ImageGear.Core Namespace is the basis of ImageGear toolkit. This namespace contains classes to operate with graphics primitives, to license product, and most importantly, primary ImageGear entities like page and document. Page is implemented in the ImGearPage Class and represents an image in memory. It contains image attributes, pixels, and offers functions for basic operating like access to stored pixels or metadata assignment.

Since the most persistent form of storage for images is files, ImageGear offers the ImGearFileFormats Class, located in ImageGear.Formats Namespace, to handle them. Using this class, it is possible to load and store single pages from local and network files, obtain properties like width and height without loading an entire image, and operate with multi-image documents (ImGearDocument Class) like TIFF. The toolkit also contains classes like ImGearLoadOptions Class and interfaces like the ImGearControlParameter Class to control image loading and saving processes (including saving the format and its characteristics).

Once an image (in its representation as ImGearPage Class) is created or obtained from a file or scanner, it is possible to process it using the ImGearProcessing Class. It defines a series of members that can be applied to any ImGearPage Class instance. Adjusting brightness/contrast, flipping, inverting, rotating and other operations are available for developers. Additionally, an export to managed GDI + Bitmap class is also available through ImGearProcessing Class.

The PageView Class and ThumbnailView Class are ASP.NET Web Form controls that let you view images in a web browser. Those controls manage all the interaction with the rest of ImageGear that they need to support the viewing operations. If your application requires additional ImageGear functionality, you can simply interact directly with ImageGear.