Color Checker:
Color Calibration: Provides a standard set of 24 patches with known colors to calibrate cameras for accurate and consistent color reproduction.
Post-Processing: Allows adjustment of colors in photographs using known color values, ensuring accurate depiction of real-world colors.
Gray Card (or White Balance Card):
White Balance Calibration: Reflects light evenly across the spectrum to set correct white balance in-camera, ensuring neutral whites and accurate colors.
Consistent Color Temperature: Helps photographers capture natural-looking images by accurately representing the color temperature of light, avoiding color casts.
In summary, the Color Checker ensures accurate color reproduction and aids in post-processing adjustments, while the Gray Card facilitates correct white balance and consistent color temperature for photographers and visual artists.