SFRreg Test Chart
The SFRreg test target consists of a slanted-edge quadrant pattern enclosed within a circle. It is used for measuring MTF and lateral chromatic aberration. A test image typically contains several targets that are automatically detected and analyzed by Imatest beginning with Version 4.2.
Distortion Note: High amounts of distortion where the target may be compressed so that the major axis is 50% larger than the minor axis may have issues with autodetection. Pre-distortion may be necessary for these cases.Download PDF Info Sheet
Details
Download PDF Info Sheet SFRreg targets can be placed at arbitrary positions and angles to accommodate a wide variety of test cases:
- Long distance tests where conventional charts would be impractically large
- Ultra-wide Field of View tests (>170) where a flat target cannot reach the outer field
- Autofocus tests where a single frame can contain several targets placed at different distances
Watch this video and see the SFRreg module in action.
Available substrates: High Precision Film, Reflective Inkjet and Transmissive Inkjet. Inkjet charts are available in either 10:1 or 4:1 contrast ratios. We offer film and transmissive inkjet targets in sizes specific to the Imatest LED Light Panel.
Reflective & Transmissive Inkjet size options
| Size | Reg Mark Diameter | Total Media Size |
|---|---|---|
| 0.5x | 100mm (3.94″) | 125mm x 165mm (4.92″ x 6.50″) |
| 1x | 200mm (7.87″) | 250mm x 330mm (9.84″ x 12.99″) |
| 1.5x | 300mm (11.81″) | 375mm x 500mm (14.76″ x 19.69″) |
| 2x | 400mm (15.75″) | 500mm x 665mm (19.69″ x 26.18″) |
| 3x | 600mm (23.62″) | 750mm x 1000mm (29.53″ x 39.437) |
| 4x | 800mm (31.50″) | 1000mm x 1330mm (39.37″ x 52.36″) |
| 5x | 1000mm (39.37″) | 1105mm x 1665mm (43.50″ x 65.55″) |
SFRreg Targets sized for the Imatest LED Light Panel
The targets listed below are sized specifically for five sizes of the Imatest LED Light Panel. All are printed on display transmissive substrate and mounted on clear acrylic for ease of placement and removal in the Light Panel rails.
| Light Panel Size | Reg Mark Diameter | Diffuser Panel Size | Total Media Size |
|---|---|---|---|
| A | 136.8mm (5.39″) |
229mm x 152mm (9″ x 6″) |
253mm x 174mm (2.09″ x 6.85″) |
| B | 198mm (7.79″) |
260mm x 220mm (10″ x 8″) |
318mm x 290mm (12.52″ x 11.42″) |
| C | 274.5mm (10.81″) |
432mm x 305mm (12″ x 17″) |
456mm x 327mm (17.95″ x 12.87″) |
| D | 388.8mm (15.31″) |
610mm x 432mm (24″ x 17″) |
634mm x 454mm (24.96″ x 17.87″) |
| F | 612mm (24.09″) |
907mm x 680mm (35.7″ x 26.8″) |
931mm x 702mm (36.65″ x 27.64″ |
High precision film targets
Produced at a size of 196.85mm x 234.95mm (7.75″ x 9.25″) on 203.2mm x 254mm (8″ x 10″) film.
| Tiling | Total Targets | Reg Mark Diameter | Total Media Size |
|---|---|---|---|
| 1 x 1 | 1 | 157.88mm (6.22″) |
196.85mm x 234.95mm (7.75″ x 9.25″) |
| 1 x 2 | 2 | 93.84mm (3.69″) |
117.0mm x 156.0mm (4.61″ x 6.14″) |
| 2 x 2 | 4 | 70.66mm (2.78″) |
88.11mm x 117.48mm (3.47″ x 4.63″) |
| 2 x 3 | 6 | 59.20mm (2.33″) |
73.82mm x 98.43mm (2.91″ x 3.88″) |
| 3 x 4 | 12 | 39.34mm (1.55″) |
49.06mm x 65.41mm (1.93″ x 2.58″) |
