Imatest eSFR ISO 2023 test charts comes in a two variants: Standard and Extended. All variations are compliant with the ISO 12233:2023 standard. See related 2017 documentation below for further information about the Imatest eSFR ISO charts. Standard E-SFR ISO 2023 test chart: 4:3 aspect ratio, 18 added color patches, 12 pairs of added wedge patterns.Extended E-SFR ISO 2023 test chart: 16:9 aspect ratio, 4 added stars in the corners and 2 added squares on sides, 18 added color patches, 12 pairs of added wedge patterns.

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The old high-contrast ISO 12233 chart, shown on the right, is referenced in the ISO 12233:2000 standard but is no longer a part of the standard. It should only be used when results need to be compared with older work.

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This ISO 12233 2014 standard defined three test charts. The new Imatest eSFR ISO module performs a highly automated analysis of the new low contrast (4:1) Edge SFR chart and is available in Imatest Master and Image Sensor 4.0. * Note: ISO 12233:2014 has the same chart requirement.

Click on any of the thumbnails below (or on the image itself, repeatedly) to explore some of the many capabilities of eSFR ISO. Note the description below the image. Results are described in more detail in eSFR ISO Part 3.

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Automated region detection, based on location criteria you enter. This makes the eSFR ISO chart and module well-suited for automated testing: with the old ISO chart, regions of interest (ROIs) had to be selected carefully whenever the image framing changed, even slightly.

The 2014/2017 "slanted square" test pattern has been replaced with the "four-cycle slanted star" test pattern to provide supplementary sagittal and tangential SFR measurements, in addition to vertical and horizontal measurements.

Vertical and horizontal (but not diagonal) wedges supported by the Imatest Wedge module, which has manual region detection.

This chart does not work with the highly automated Imatest eSFR ISO module, described below. For highly automated measurements (including squares near the corners, color patches, and wedges) we recommend one of the Imatest eSFR ISO charts shown below. These charts are fully compliant with ISO 12233:2017 and ISO 12233:2023, respectively.

Sharpness is derived from edges at the boundaries of the slanted squares, as described in Sharpness: What is it and how is it measured? eSFR ISO can handle a wide range of camera aspect ratios; the left and right sides of the chart may extend beyond the frame or be well inside it.

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Standard eSFR ISO chart: 3:2 aspect ratio, no added features Click on any of these charts for larger versions.Enhanced eSFR ISO test chart: 3:2 aspect ratio, 6 added squares on sides, 16 added color patches, several added wedge patterns.Extended eSFR ISO test chart: 16:9 aspect ratio for HDTV and cinema (and good for DSLRs), 6 added squares on sides, 16 added color patches, several added wedge patterns.

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Note: the old ISO 12233:2000 standard and chart, shown on the right, is referenced in the new ISO 122433:2017 standard, but is no longer an official part of the standard. The new standard specifies three charts, one of which is a slanted-edge (Edge SFR or E-SFR) chart with much lower contrast (4:1; shown on the right, below).

Semigloss inkjet is slightly sharper and has a more accurate grayscale in the deep tones (print densities > 1.5) than matte inkjet, but is more susceptible to glare (specular reflections), especially with wide angle lenses. Matte surface is recommended for wide angle lenses.

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The enhanced and extended charts add features to regions of the chart that are not specified by the ISO standard (but don't violate it), and which will be valuable to most users.

Supported by the Imatest Star Chart module. Optional automatic region detection is available when used with a star pattern that has registration marks on the sides of the image.

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The Imatest Standard eSFR chart is very close to the chart illustrated in the ISO 12233:2017 standard document, with a few minor differences that maintain compliance with the standard.

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Imatest eSFR ISO 2017 test charts come in three variants: Standard, Enhanced and Extended. All have enhancements over the chart illustrated in the ISO 12233:2017 document, but all conform to the standard. Enhanced versions are available from the Imatest store in inkjet, photographic paper, and photographic film media. Note: The standard design is not sold as an Imatest Chart because it is functionally a subset of the enhanced version.

The new Imatest eSFR ISO module performs highly automated measurements of several key image quality factors using versions of the new ISO 12233:2017 E-SFR (Edge SFR) test chart that may be purchased from the Imatest store (recommended) or printed on a high-quality inkjet printer. Unlike most other Imatest modules (except for SFRplus, which it closely resembles), the user does not need to manually select Regions of Interest (ROIs). Image quality factors include:

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Photographic charts (reflective and LVT film transmissive) are much finer than inkjet: the same size chart is capable of analyzing much higher resolution cameras.