Color Science & Image Fidelity Flashcards

What is the primary purpose of a color lookup table (LUT) in display calibration?

Answer: To remap input color values to achieve accurate output

A LUT remaps input color values to corrected output values, compensating for display nonlinearities during calibration.

Which color temperature is considered the standard white point for critical video mastering per ISF guidelines?

Answer: 6504K (D65)

D65 (approximately 6504K) is the international standard white point for video and broadcast as defined by ITU-R BT.709 and referenced in ISF calibration standards.

What does the term 'gamut mapping' refer to in display science?

Answer: Translating colors from one color space to another when they fall outside the target gamut

Gamut mapping converts colors that exist in a source color space into the closest representable color in the destination color space.

In the CIE xy chromaticity diagram, what does a point closer to the outer spectral locus represent?

Answer: A more saturated, spectrally pure color

Points near the outer spectral locus represent highly saturated, nearly monochromatic colors, while the center (white point) represents neutral.

Which of the following best describes metamerism in the context of display calibration?

Answer: Two colors that appear identical under one light source but different under another

Metamerism occurs when two color samples with different spectral power distributions appear identical under a specific illuminant but differ under another.

What is the significance of the 'knee point' in a camera's tone curve?

Answer: The transition point where highlight compression begins to prevent clipping

The knee point is where a camera's tone curve rolls off highlight response to compress bright values and prevent hard clipping at maximum signal level.

Which measurement instrument is considered the gold standard for verifying display luminance and color accuracy in ISF calibration?

Answer: Spectroradiometer

A spectroradiometer measures the full spectral power distribution of light, providing the most accurate absolute color and luminance measurements for professional display calibration.