Study of Luminance and Correlative Color Temperature of Chroma-Key Lighting Set-Up
Keywords:
Luminance, Correlated Color Temperature, Chroma-Key Lighting, Color Code Number of 16Abstract
This research studied the optical properties, luminance and correlative color temperature to set up lighting using Chroma-Key lighting with 5 tungsten halogen lamps rated at 1000 W, 2 lamps rated at 650 W and 1 lamp rated at 2000 W. For Case 1 (the blue scene), the correlative color temperature (CCT) was found to be 2780 K, which was in the warm zone. The tristimulus XYZ values were 47.52, 44.361, 117.628, while the values were 142.258, 173.486, 274.16. The resulting 16-base color code after inputing the RGB color values into the editing program was 8EADFF, which was bright blue color with a high illumination (Y) of 44.361% and a blue value (B) of 274.16. For Case 2 (the blue scene), the CCT value was found to be 5925 K, which was in the cool zone. The tristimulus XYZ values were 15.509, 14.457, 42.771, while RGB the values were 73.258, 104.084, 175.482. The resulting 16-base color code was 4968AF, which was dark blue color with Y value of 14.457% and B value of 175.482. For Case 3 (the green scene), the CCT value was noted to be 2757 K, which was in the warm zone. The tristimulus XYZ values were 56.844, 85.969, 74.262, while the RGB values were 108.121, 265.121, 209.546. The resulting 16-base color code was 6CFFD1, which was bright green color with Y value of 85.969% and a green value (G) of 265.121. Finally, for Case 4 (the green scene), the CCT value was found to be 5368 K, which was in the cool zone. The tristimulus XYZ values were 22.573, 38.156, 28.337, while the RGB values were 12.031, 188.985, 132.933. The resulting 16-base color code was 00BD84, which was dark green color with Y value of 38.156% and G value of 188.985. From the results of the above four cases, Case 3 had higher illumination (higher Y value), and Case 2 had low illumination.
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