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Standard SFRplus Chart

Standard SFRplus Chart Instructions Operating Manual Standard SFRplus Chart PDF
This Standard SFRplus Chart Instrument are Certified with
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1 Years Warranty (Additional support period of 3 years)

The SFRplus test chart can be used with the SFRplus module in Imatest 3.2 or later to measure MTF, lateral chromatic aberration, distortion, tonal response, and color accuracy. The SFRplus module features fully automated region-of-interest detection. The SFRplus chart offers significant advantages over commonly used charts such as the ISO 12233 chart, including 1) much less wasted area, 2) the ability to produce a map of sharpness over the sensor surface, 3) better measurement accuracy due to the lower contrast, and 4) full support for automated testing.

This chart is recommended for most standard testing setups and devices. Choose a size based on your sensor and setup limitations.


Options include:

  • Grid: 5x9 grids are recommended for for typical DSLR formats with aspect ratios of 3:2
  • Paper Size and Active Area Options

    This chart is available in three sizes. It is recommended that the medium sized charts be used to test imaging systems with sensors up to 12 MP, the large charts be used for testing of sensors up to approximately 24 MP, and the extra-large charts be used for sensor sizes above 24 MP.

    Paper Size (Including Margin)

      5x9
    Medium 24
    Large 44
    X-Large 44

    Active Area

    The active area of the chart includes white space above and below the top and bottom distortion bars. It is slightly larger than the printed area, which is bounded by the distortion bars on top and bottom. White space is included in active area because test images of the chart must include this white space in order to enable automated processing in SFRplus software.

      5x9
    Medium 22
    Large 33
    X-Large 42
  • Paper/ink type: Matte paper/ink can be used to reduce reflected light and allow for easier lighting setups
  • Contrast levels: 4:1 contrast ratio for new ISO standard compliance
  • Color chart: a 20 patch color chart.

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FAQs About  SFRPlus Test Charts


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.

Yes, we offer free samples for test, you are welcome to order samples to experience our excellent quality and service.

The ΔE (Delta E) formula of the CIELAB color space is usually used to measure color difference. The difference is measured in a colorimeter or spectrophotometer to gauge the level of perceptibility of the difference between two samples in terms of L*a*b*.


Make sure the light sources are calibrated, keep extraneous light sources away, have the correct viewing angles, and handle the samples in a clean and uniform manner.


The measurement of color varies according to context in several units. Such common units are L*a*b* (CIELAB), RGB (Red-Green-Blue), and color difference (Delta E). In light absorption, there are no units assigned to absorbance. But the quantitative analysis of absorbance obeys Beer's Law in colorimetry.

To quantify color change, take the original L*a*b* values of a sample, and reread after exposure or processing. Compute the difference as 1/2(Emut1 Emut2). The larger the value of ΔE, the more obvious the change of color is, which can be used in quality or stability testing.


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