| AnimThread | Image processing play thread |
| Camera | Abstract camera class |
| Camera::CamInfo | Structure used to hold information on the camera's attributes |
| imageSeq | Class containing image sequence |
| Improv | A Singleton class that is used to track the global state of the application |
| improvConfig | Stores all config values for easy access by all objects |
| improvConfig::pluginInstance | A structure used to store information about an instance of an processing operation |
| improvConfig::widgetConfig | A structure used to store the configuration information of both source and sequence widgets |
| ImprovQTApp | Application main window class |
| ImprovQTCamOpt | Camera options dialog box |
| ImprovQTHelp | Help information dialog box |
| ImprovQTOpt | Options dialog box |
| ImprovQTView | This class provides the application view |
| IP_Descriptor | A structure containing the meta information for the entire plugin and an array of meta information for each operation |
| IP_Op | This structure contains the metadata for each operation within the image processing plugin |
| ipPlugin | Implements the plugin interface using improv image processing plugins, as defined in improv_plugin.h |
| OptWidget | Widget used within the ImprovQTOpt dialog to alter the configuration of the source and sequence widgets |
| ParamWidget | Parameter widget, used for control the variables of each image operation |
| PixWidget | A double buffered widget for displaying pixmaps |
| Plugin | Abstract image processing plugin class |
| PluginItem | This class represents an instance of a plugin operation, as listed in the SeqWidget |
| PluginMenu | Constructs a Popup menu from a plugin |
| PluginMenu::PluginOp | The plugin operation structure |
| Point | Structure used to represent a single point (or pixel) in an image |
| QuickCam | Implementation of the Camera class for QuickCam |
| SeqWidget | Sequence widget |
| SrcWidget | Source widget |
| StatusWidget | A more complex application status bar |
| V4L2Camera | Implementation of the Camera class for Video 4 Linux 2 devices |
| V4LCamera | Implementation of the Camera class for Video 4 Linux devices |
| Window | Structure used to represent a rectangluar window in an image |
