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Color Spilled Coins (Dead Leaves) Test Chart

Color Spilled Coins (Dead Leaves) Test Chart Instructions Operating Manual Color Spilled Coins (Dead Leaves) Test Chart PDF
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The Color  Spilled Coins chart (a variant of the Dead Leaves chart) for measuring texture sharpness has several advantages over older Dead Leaves charts. Key features:

  • The Scattered Coins pattern in the central region is almost perfectly scale-invariant (unlike conventional dead leaves charts), enhancing the accuracy and robustness of MTF measurements so they correlate well with other methods (such as the slanted-edge) for RAW images (which have no nonuniform or nonlinear processing).
  • Maximum contrast range is 3:1, as called for in the CPIQ Phase 3 draft Texture Blur Metric draft specification.
  • It is more uniform, i.e., is more shift-invariant than other Dead Leaves charts.
  • It contains slanted edges (2:1 and 4:1 contrast) for convenient comparisons with the dead leaves pattern.
  • The gray area to the left and right of the dead leaves pattern has the same mean density as the dead leaves pattern, allowing it to be used for effective noise PSD removal using the McElvain et. al. technique.
  • Registration marks and 16 grayscale patches are included. The linear levels used to create the grayscale patches are 0 through 255 in steps of 17 (same as the Siemens Star chart in the draft of the upcoming ISO 12233 standard).
Spilled Coins chart sizes Spilled Coins region Printed region Media size total
Large 12" × 12"
305 mm × 305 mm		 22.4" × 16.8"
569 mm × 426 mm		 24" × 18"
610 mm × 458 mm
Medium 8" × 8"
203 mm × 203 mm		 14.93" × 11.2"
379 mm × 284 mm		 16" × 12"
458 mm × 305 mm
Small 6" × 6"
152 mm × 152 mm		 11.2" × 8.4"
284 mm × 213 mm		 12" × 10"
305 mm × 254 mm
X-Small (High Precision Transmissive) 5.536" × 5.536"
141 mm × 141 mm		 9.25" × 7.75"
159 mm × 197 mm		 10" × 8"
254 mm × 203 mm

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FAQs About  Texture Test Charts

Measurement Accuracy (dE/ΔE): The smaller the value, the higher the match between the color measured by the colorimeter instrument and human visual perception. Generally, dE < 1.0 is regarded as the industrial passing line, while dE < 0.5 falls into the high-precision level. 

Measurement Structure: D/8 (integrating sphere structure) is the universal standard, which includes two modes: SCI (Specular Component Included, with specular reflection light) and SCE (Specular Component Excluded, excluding specular reflection light). 45/0 (ring illumination) simulates the human eye's viewing angle and is more suitable for judging reflective materials. 

Repeatability: It refers to the difference in color results when measuring the same point multiple times. The equipment can achieve ΔE < 0.08, ensuring highly reliable measurement results. 

Illumination Source and Viewing Angle: It is recommended to choose the combination of CIE standard light source D65 (simulating daylight) and a 10° viewing angle. 

Application Scenario Requirements: It is necessary to clarify the purchase purpose (quality inspection? R&D? material evaluation?) and the usage environment (laboratory, workshop or field work?).


Light should be projected through the sample to measure haze, then assess the scattered light with an integrating sphere and sensors.  The haze percentage is ascertained by the scattering light to the total transmitted light.

The dry film thickness is assessed after the coating is cured, while the wet film thickness is obtained immediately after the coating is applied using a wet film comb gauge. Dry film measurement is critical to ensuring that the coating applied matches the standards expected in terms adherence and polish. 

There are many factors that can influence accuracy such as surface roughness, temperature, substrate material, and calibration settings. For ferrous metals, external magnetic fields can also distort measurements. Proper calibration and preparation will help reduce the impact of these factors.


In the study of chemical reactions, calorimetry deals with changes in heat (energy and enthalpy). Spectrophotometry is the measurement of the light absorbance or light transmittance to determine the concentration or color of a solution. The first one monitors the thermal processes, whereas the second one addresses the aspects of light and color.



Colorimeter calibration is indispensable for reliable quality control—ensuring measurement accuracy by compensating for component aging, environmental interference, and baseline drift. It standardizes data across devices/batches, maintains compliance with industry standards, and prevents costly rework from inaccurate color readings, making it critical for precision-driven industries like printing, food, plastics, textiles, paint and coatings.

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