Final answer:
To make OD and OS test images unfusible, you can change the contrast, vary the luminance, alter the size, or modify the orientation.
Step-by-step explanation:
To make OD and OS test images unfusible, there are several methods you can employ:
- Change the contrast: Adjust the contrast on the screen or device displaying the images to make them less fusible.
- Vary the luminance: Manipulate the brightness or intensity of the images to make them distinguishable.
- Alter the size: Adjust the size of the images to make them appear different and prevent fusion.
- Modify the orientation: Change the orientation or rotation of the images to make them visually distinct.