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ISO 12233: 2014 (eSFR)Photographic chart

E-SFR chart

The ISO 12233: 2014 (eSFR)Photographic chart is implementation of the Low Contrast Edge SFR (E-SFR) test chart illustrated in Section 6.1 and Annex C of the ISO Standard Document. We offer the Enhanced version of this chart in high resolution photographic prints, suitable for high resolution sensors up to 54MP at the 4x size.

All our ISO 12233:2014 E-SFR charts are fully compliant with the ISO standard. The eSFR ISO module provides highly automated support for the new charts.">
 

 

Chart Sizes Enhanced Megapixel Suitability *
1x 200 mm × 305 mm
7.875" × 12"
3.4 MP
2x 400 mm × 610 mm
15.75" × 24"
13 MP
4x 800 mm × 1220 mm
31.5" × 48"
54 MP

ENHANCED E-SFR test chart

 ISO 12233:2014 E-SFR chart has all the features of the Standard chart, keeping the 3:2 aspect ratio, with the addition of six added slanted squares for measuring performance near the image boundaries and hyperbolic wedges for visual analysis or analysis with our Wedge module. 

The differences between the  charts and the chart illustrated in the standard are listed below. Even with these differences the suwang chart is in full compliance with the standard.

  • A 20 patch OECF grayscale pattern* is used as opposed to the 16 patch version.
  • The Focus Patterns in the centers of the squares are rectangular (to increase the MTF measurement area) and are designed to reduce interference with automatic edge detection.
  • There are four registration marks instead of three to facilitate automated region detection. (Four features are required for a projective transform.)
  • An additional mark above the lower-left registration mark is used for detecting chart orientation.

The differences between the Enhanced and Standard Versions are as follows:

  • Six extra slanted squares are added for measuring performance near the image boundaries.
  • Several hyperbolic wedges with spatial frequencies, similar to the CIPA chart referenced in the ISO standard, for visual analysis or use with the Wedge module.
  • 16 color patches when produced with technologies that allow color (inkjet or color LVT), with colors similar to the industry-standard 24-color test chart.
     

Megapixel Quality Ratings

Megapixel suitability is based on analysis of Modulation Transfer Function (MTF) obtained from a chart image captured using a 1:1 magnification lens (Canon 65mm f/2.8 1-5x macro) and a 6.5µm pixel size sensor (Canon EOS 6D). In order to consider performance throughout the cameras range of expected sharpness, MTF90 (the spatial frequency where MTF is 90%) is weighted at 0.5, MTF70 is weighted at 0.35, and MTF50 is weighted at 0.15. Conversion to megapixels is based on the Chart Quality Index (CQI) calculation which determines sensor height suitability using the equation 2 * MTFxx (cycles per object mm) * vertical chart height (mm), where xx is 90, 70 or 50. Megapixel suitability calculations assume that (1) the lens is of high quality, (2) that the chart fills the vertical field of view (vFoV) of the camera system, and (3) that the sensor aspect ratio is 3:2. For 16:9 aspect ratio sensors (with pillarboxed framing, if applicable), multiply the megapixel suitability by 1.185. For 4:3 aspect ratio sensors (with left/right sides of chart cropped), multiply megapixel suitability by 0.889. Charts can be suitable for significantly higher megapixel counts if the minimum resolvable feature size of the lens is larger than the pixel size or the chart fills less than the full sensor vertical field of view.





Color Rendition Chart (X-Rite ColorChecker)

Scan Reference Chart

Universal Test Target

Critical Flesh Tones Test Chart

Bar Test Chart(IEC 61146)


White Balacing Test Chart


ISO 12233:2014 Edge SFR(eSFR)Test chart


Color Spilled Coins (Dead Leaves) Test Chart


Gray Scale Test Chart(11 steps)


Streaking Measurement Test Chart


Color Bar Test Chart


Gray scale chart


Grid Test Chart


ISO 12233 Enhanced digital camera resolution chart


Standard SFRplus Chart


SFRplus Chart on Photographic Paper QI-SFR10-P-RM


ITE Grayscale Chart II(Gamma = 1)


Black & White Spilled Coins (Dead Leaves) Test Chart


OECF Test Chart (ISO 14524)


ISO 12233: 2014 (eSFR)Photographic chart


ISO-14524 digital camera contrast chart



ISO-15739 digital camera noise test chart


ISO 12233 Digital still-camera resolution chart


Automotive Test Chart



SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio



SFRplus Chart: Inkjet on Paper - 10:1 & 2:1 Contrast Ratio



Distortion Grid Test Chart


HDTV Gray Scale Test Chart


ITE Grayscale Chart I(Gamma = 0.45)


EIA RESOLUTION CHART 1956

Sector Star Test Chart (72 cycles)


Sector Star Test Chart (36 cycles)


HDTV Universal Test Chart


DTV Color Rendition Test Chart


36-Patch Dynamic Range Test Chart


Spectrometer OHSP-350

OHSP350A Light Spectrometer

HPL-200 Flicker illuminometer




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