In this chapter, we will cover the following recipes:
- Reading images from file
- Simple image transformations—resizing and flipping
- Saving images using lossy and lossless compression
- Showing images in an OpenCV window
- Working with UI elements, such as buttons and trackbars, in an OpenCV window
- Drawing 2D primitives—markers, lines, ellipses, rectangles, and text
- Handling user input from a keyboard
- Making your app interactive through handling user input from a mouse
- Capturing and showing frames from a camera
- Playing frame stream from video
- Obtaining a frame stream properties
- Writing a frame stream into video
- Jumping between frames in video files
