Fruit Still Life — Colour (512px)
A colour fruit still life (apple, orange, banana, grapes), paired with a true-greyscale conversion — a real-world subject for testing desaturation and how distinct hues collapse to similar greys.
Colour ↔ greyscale test images
Colour originals paired with true-greyscale conversions, grey wedges, and gradient ramps for testing desaturation and tone handling.
Fruit Still Life — Greyscale (512px)
True 8-bit greyscale conversion of the fruit still life, the paired reference for testing colour-to-grey conversion.
Gradient Composition — Colour (512px)
A smooth three-channel gradient composition, paired with its greyscale conversion to test luminance handling.
Gradient Composition — Greyscale (512px)
True 8-bit greyscale conversion of the gradient composition, the paired reference for testing colour-to-grey conversion.
Full-Saturation Hue Bars — Colour (512px)
Vertical bars sweeping the full hue circle at maximum saturation, paired with a greyscale version that shows how colours of different hues collapse to similar greys.
Full-Saturation Hue Bars — Greyscale (512px)
True 8-bit greyscale conversion of the full-saturation hue bars, the paired reference for testing colour-to-grey conversion.
16-Step Grey Wedge
A 16-step greyscale wedge from pure black to pure white, for testing tone reproduction, banding, and monitor calibration.
Black-to-White Tonal Ramp
A continuous linear greyscale ramp from black to white, useful for spotting banding and gamma issues.
50% Grey Card
A flat 50% grey card (rgb 128,128,128), a reference for white balance and exposure testing.