highgui. High-level GUI and Media I/O

While OpenCV was designed for use in full-scale applications and can be used within functionally rich UI frameworks (such as Qt, WinForms or Cocoa) or without any UI at all, sometimes there is a need to try some functionality quickly and visualize the results. This is what the HighGUI module has been designed for.

It provides easy interface to:

• create and manipulate windows that can display images and “remember” their content (no need to handle repaint events from OS)
• add trackbars to the windows, handle simple mouse events as well as keyboard commmands
• read and write images to/from disk or memory.
• read video from camera or file and write video to a file.

• User Interface
  • ConvertImage
  • CreateTrackbar
  • DestroyAllWindows
  • DestroyWindow
  • GetTrackbarPos
  • GetWindowHandle
  • GetWindowName
  • InitSystem
  • MoveWindow
  • NamedWindow
  • ResizeWindow
  • SetMouseCallback
  • SetTrackbarPos
  • ShowImage
  • WaitKey
• Reading and Writing Images and Video
  • LoadImage
  • LoadImageM
  • SaveImage
  • CvCapture
  • CaptureFromCAM
  • CaptureFromFile
  • GetCaptureProperty
  • GrabFrame
  • QueryFrame
  • ReleaseCapture
  • RetrieveFrame
  • SetCaptureProperty
  • CreateVideoWriter
  • ReleaseVideoWriter
  • WriteFrame
• Qt new functions
  • SetWindowProperty
  • GetWindowProperty
  • FontQt
  • AddText
  • DisplayOverlay
  • DisplayStatusBar
  • CreateOpenGLCallback
  • SaveWindowParameters
  • LoadWindowParameters
  • CreateButton