The ISO 12233:2023 e-SFR test card is a grayscale test card specifically designed to evaluate the edge spatial frequency response (SFR) of images. Structurally, 9 windmill shaped oblique star patterns and 16 grayscale block patterns are used, along with low contrast designs in 4:1 and 6:1 versions. By analyzing the number of cameras with tilted low contrast and neutral edge attachments, the performance of the camera can be accurately measured.

ISO 12233:2023 e-SFR test card can accurately evaluate the spatial resolution and clarity of cameras, mobile phones, scanners, etc., helping users understand the performance of the device when capturing images.

Note: ISO 12233: The 2023 "slanted star" replaces the low-key "slanted square" testing mode used in ISO 12233:2014 and ISO 12233:2017.

1、 ISO 12233:2023 e-SFR Test Card Characteristics

1. The "slanted star" pattern

By adopting a more comprehensive "oblique star" pattern, vertical, horizontal, and diagonal cross imaging system SFR measurement and analysis can be completed.

2. Gray scale block pattern

16 grayscale block patterns can improve the accuracy of MTF measurements when dealing with non-linear tone correspondences or using higher contrast targets.

3. The mainstream standard ratio

Adopting mainstream standard proportions, suitable for more camera measurements, including other high-definition camera images

4. Multiple contrast options available

A graphics card with two contrast ratios of 4:1 and 6:1, which users can choose according to their actual needs

5. Black circular registration mark

Using 3 black circular positioning markers for automatic area detection

6. Additional markings

Additional markers above the registration mark can be used to detect the orientation of the chart

2、 ISO 12233:2023 e-SFR Test Card Specification Parameters

Note: All test cards in this series can be customized for patterns and sizes. If you have any requirements, please contact customer service directly.

3、 ISO 12233:2023 e-SFR test card usage precautions

1. Test card installation

The test card should be installed and fixed in a suitable position to achieve the best testing results

2. Image capture

The camera's viewfinder should be parallel to the test card, and there should be no left or right, up or down, or rotation tilt; And pay attention to the scale and boundaries on the test card.

3. Image processing software

Use image processing software compatible with ISO 12233:2023 standard to ensure correct analysis and processing of test images.

4. Test card replacement

Regularly check and update test cards to ensure the accuracy and reliability of test results.