Image quality factorTexture View products

Expertly test texture reproduction

The “Dead Leaves” chart was the first to test a camera’s ability to reproduce texture; Imatest has improved upon this with our “Spilled Coins” chart, which is perfectly scale invariant, producing reliable and consistent test results.

Related standard: ISO/TS 19567, Texture

Imatest Spilled Coins test chart: a scale-invariant pattern of overlapping gray disks between two gray panels, with slanted edges and grayscale patches

Spilled Coins (Dead Leaves)

  • A variant of the Dead Leaves chart for measuring texture sharpness
  • Almost perfectly scale-invariant, for more accurate and robust MTF measurements
  • More uniform (shift-invariant) than other Dead Leaves charts
  • Slanted edges (2:1 and 4:1 contrast) for comparison with slanted-edge MTF
  • Gray areas on either side, with the same mean density as the pattern, for noise PSD removal
  • In black & white, color and Cross versions; the Cross charts use cross-correlation texture metrics, which are more stable with nonlinear noise reduction

Learn more about Spilled Coins

Log F-Contrast test chart: a sine pattern whose frequency rises from left to right and whose contrast falls from top to bottom

Log F-Contrast

  • Spatial frequency increases from left to right and contrast decreases from top to bottom
  • Sinusoidal, so its modulation is equivalent to SFR or MTF
  • Measures the loss of fine, low-contrast detail (texture) caused by noise reduction, which can give a “plastic” appearance
  • Shows the effects of sharpening and noise reduction
  • Registration marks for automatic region detection; analyzed in Imatest Rescharts

Learn more about Log F-Contrast

Texture Test Charts