Visualization of image distortions:

image distortion: geometry/color (horizontal flip)
geometry/color (horizontal flip)
image distortion: geometry/color (vertical flip)
geometry/color (vertical flip)
image distortion: geometry/color (rotate 180deg)
geometry/color (rotate 180deg)
image distortion: geometry/color (rotate 90deg)
geometry/color (rotate 90deg)
image distortion: geometry/color (rotate 270deg)
geometry/color (rotate 270deg)
image distortion: geometry/color (RGB↔BGR)
geometry/color (RGB↔BGR)