Sample Variant: 5X9 grid,
color patch, both 10:1 and 2:1 contrast

The SFRplus test chart can be used with the SFRplus module in Imatest 3.2 or later to measure MTF, lateral chromatic aberration, distortion, tonal response, and color accuracy. The SFRplus module features fully automated region-of-interest detection. The SFRplus chart offers significant advantages over commonly used charts such as the ISO 12233 chart, including 1) much less wasted area, 2) the ability to produce a map of sharpness over the sensor surface, 3) better measurement accuracy due to the lower contrast, and 4) full support for automated testing.

SFRplus options are offered to support a wide range of image testing applications. Options include:

• Grid: 5x9 grids are recommended for for typical DSLR formats with aspect ratios of 3:2 and typical HDTV formats with aspect ratios of 16:9. 5x7 grid are recommended for typical compact camera formats with aspect ratios of 4:3.
• Active Area: Charts are available in three sizes with minor variations depending on the grid dimensions selected. It is recommended that the smaller charts be used to test imaging systems with sensors up to 12 MP, the larger charts be used for testing of sensors above 12 MP and up to approximately 24 MP, and the extra-large charts be used for sensor sizes above 24 MP
  • The smaller 5x9 chart has an active area of approximately 22 X 39 22 inches and is printed on 24 x 40 inch paper.
  • The smaller 5x7 chart has an active area of approximately 22 X 33 inches and is printed on 24 x 40 inch paper.
  • The larger 5x9 chart has an active area of approximately 33 X 59 inches and is printed on 44 X 60 inch paper.
  • The larger 5x7 chart has an active area of approximately 40 X 56 inches, and is printed on 44 X 60 inch paper
  • The extra-large 5x9 chart has an active area of approximately 42 x 72 inches and is printed on 44 X 74 inch paper.
  • The extra-large 5x7 chart has an active area of approximately 40 x 67 inches and is printed on 44 X 72 inch paper.
  The active area of the chart includes white space above and below the top and bottom distortion bars. It is slightly larger than the printed area, which is bounded by the distortion bars on top and bottom. White space is included in active area because test images of the chart must include this white space in order to enable automated processing in SFRplus software.
• Paper/ink type: Semi-gloss OR Matte. Matte paper/ink can be used to reduce reflected light, but is slightly less sharp than semi-gloss paper. Semi-gloss paper/ink is recommended for most applications.
• Contrast levels: 10:1 and 2:1 contrast levels OR 10:1 contrast only. Use of both contrast levels improves ability to analyze non-linear signal processing, while use of only 10:1 contrast improves the utility of 3D maps of performance across the imaging surface
• Color chart: Yes OR No. Inclusion of the color chart enables testing of color accuracy. If color is selected, the star pattern that aides in focusing is replaced by a 20 patch color chart.

Custom variations of the SFRplus chart are available at little extra cost. Please contact sales@imatest.com to discuss your specific requirements.

*Please note that only the size options influence pricing.