Images no.

Light intensity

Location

Sensor and light source (azimuth and zenith angles)

1

low

UPM University

zero

2

moderate

UPM University

zero

3

higher

UPM University

zero

Reference

The highest

UPM University

zero

4

Less than

UPM University

zero

5

moderate

UPM University

zero

6

lowest

UPM University

zero