Randomly distort an image across its horizontal or vertical axis. This adds variability to perspective to help your model be more resilient to camera and subject pitch and yaw.
Horizontal: Select the highest amount an image will be randomly sheared across its x-axis.
Vertical: Select the highest amount an image will be randomly sheared across its y-axis.
Example
Original Image
Shear Augmentation with 10° X-axis and 10° Y-axis Shear
