Which adjustment technique uses gray balance or a gray card to correct color in an image?

Which adjustment technique uses gray balance or a gray card to correct color in an image?

• A. Hue/Saturation
• B. Levels
• C. Color Balance (Photoshop)
• D. Photo Filter

Answer: (C)

Using gray balance or a gray card is about neutralizing color casts so the image reads as true color. A gray card gives a neutral reference point, telling you what gray should look like under the lighting, which you then use to correct the overall color balance. In Photoshop, Color Balance is the tool designed for this purpose: you can adjust the red–cyan, green–magenta, and blue–yellow balance across shadows, midtones, and highlights to bring the gray areas to neutral. This makes it the best fit for correcting color balance because you’re directly addressing color casts rather than altering brightness or individual colors in isolation. Hue/Saturation changes hue and saturation, not the neutral balance with a gray reference. Levels adjusts tonal distribution and how color channels contribute to brightness, but it isn’t used primarily for gray-card color correction. Photo Filter adds a uniform tint and doesn’t rely on a neutral gray reference to correct color.

Using gray balance or a gray card is about neutralizing color casts so the image reads as true color. A gray card gives a neutral reference point, telling you what gray should look like under the lighting, which you then use to correct the overall color balance. In Photoshop, Color Balance is the tool designed for this purpose: you can adjust the red–cyan, green–magenta, and blue–yellow balance across shadows, midtones, and highlights to bring the gray areas to neutral. This makes it the best fit for correcting color balance because you’re directly addressing color casts rather than altering brightness or individual colors in isolation. Hue/Saturation changes hue and saturation, not the neutral balance with a gray reference. Levels adjusts tonal distribution and how color channels contribute to brightness, but it isn’t used primarily for gray-card color correction. Photo Filter adds a uniform tint and doesn’t rely on a neutral gray reference to correct color.