| LED to ambient light ratio | The ratio between LED and ambient light |
| Between class variance | The discrepancy between the features of On and Off LEDs |
| Within class variance | The discrepancy among the features of each type of LEDs |
| LED extinction ratio | The ratio between the greyscales of On and Off LEDs in the captured image |
| LED interference | The interference between adjacent LEDs in the captured image |
| LED spacing | The amount of space between LEDs in the image |
| LED interval | The inter-distance between LEDs in the LED panel |
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