The Imatest Extended ISO 12233:2023 eSFR chart is based on the latest revision of the ISO 12233 standard, along with six extra slanted stars, and 18 color patches. It has a 16:9 aspect ratio, which makes it suitable for HDTV and cinema measurements (and it also works well with 3:2 aspect ratio DSLRs). It is fully compliant with the standard. 

This chart will work with the fully-automated eSFR ISO module, starting with the Imatest 23.2 release.

• A 20-patch OECF grayscale pattern
• 18 color patches with colors similar to the industry-standard 24 patch (18 color patches) test chart.
• Logarithmic wedges with spatial frequencies, similar to the CIPA chart referenced in the ISO standard, for visual analysis or use with the Imatest Wedge module.
• 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.