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Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for

    Buy cheap Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for from wholesalers
     
    Buy cheap Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for from wholesalers
    • Buy cheap Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for from wholesalers

    Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for

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    Brand Name : 3NH brand
    Model Number : SFRplus test charts
    Certification : CE/ISO9001/ROHS
    Price : USD
    Payment Terms : T/T
    Supply Ability : 1000/months
    Delivery Time : 2 working days
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    Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for

    Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent for MTF, distortion, tonal response, and color

    Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent


    Sineimage SFRplus Chart: Inkjet on Paper - 4:1 Contrast Ratio Transparent

    ModelSFRplus
    TypeTransparent
    FormatCustom Designs
    Contrast Ratios4:1

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

    Contrast Ratios Options


    • 1. 4:1 contrast ratio matches the upcoming new ISO-12233 specs.
    • 2. 10:1 and 2:1 contrast ratios Use of both contrast levels improves ability to analyze non-linear signal processing, which may not affect the lower contrast 2:1 contrast ratio regions
    • 3. 10:1 contrast only improves the completeness of 3D maps of performance across the imaging surface.

    Paper Type - Semi-gloss or Matte Options


    • 1. Matte paper can be easier to light because it has less specular reflection than the semi-gloss paper. The MTF is slightly less than semi-gloss paper and does not have as deep dark tones on the stepchart.
    • 2. Semi-gloss paper has slightly higher detail than matte, has deeper black tones on the stepchart, and is recommended for most applications except for wide-angle lenses.

    Square Grid Dimensions Options


    • 1. 5x9 grid dimension is recommended for for typical DSLR formats with aspect ratios of 3:2 and typical HDTV formats with aspect ratios of 16:9.
    • 2. 5x7 grid dimension is recommended for typical compact camera formats with aspect ratios of 4:3.

    Ink Jet Chart Resolution

    This SFRplus test chart, and all our ink jet printed charts have an approximate MTF50 of 5 cycles/mm. For a comparison of rflective surfaces, as well as what this means when choosing your chart, please visit our Reflective Surface Comparison Blog. Please keep this in mind when choosing the size of chart. Using a chart that is too small with a high-resolution sensor can result in the MTF of the chart degrading the measured MTF of the camera system. In addition, it is important to use a chart that is large enough to accomodate the minimum focus distance, as well as the resultion of your sensor.


    Paper Size and Active Area Options


    Charts are available in five main sizes with variations depending on the grid dimensions selected. It is recommended that the medium sized charts be used to test imaging systems with sensors up to 12 MP, the large 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.

    Paper Size (Including Margin)


    Square Dimensions
    5x95x7
    X-Small8.5" × 15"8.5" × 10"
    Small14" × 24"14" × 20"
    Medium24" × 40"24" × 34"
    Large44" × 60"44" × 60"
    X-Large44" × 74"44" × 64"

    Active Area


    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.


    Square Dimensions
    5x95x7
    X-Small7.85" × 15"6.75" × 10"
    Small12.5" × 24"13.5" × 20"
    Medium22" × 39.22"22" × 33"
    Large33" × 59"40" × 59"
    X-Large42" × 72"42" × 59"

    Color Chart Options


    Inclusion of the color chart enables testing of color accuracy. If the color option is selected, the "focus star" pattern that aides in focusing is replaced by a 20 patch color chart.


    Pre-Distortion Options


    Pre-distorted charts offer the ability to map the outer edges of a wide angle or fisheye lens using SFRplus. These distortion levels are available


    LevelMatrix
    No distortion[1 1]
    Distort[0.833 1.123]
    Distort+[1.167 1.577]
    Ultradistort[1.167 1.982]

    Standard Version

    Standard Version

    This chart, which has a 3:2 aspect ratio, is a "no-frills" implementation of the standard. For most work we recommend the Enhanced or Extended charts, which have additional edges for measuring performance near the image boundaries, as well as hyperbolic wedges and color patches (where the technology allows). These chartsmaintain full compliance with the standard.
    The Imatest Standard ISO 12233:2014 E-SFR chart closely resembles the Low contrast E-SFR test chart illustrated in section 6.1 and Annex C of the ISO standard document, with a few differences, all of which are fully compliant with the ISO standard.

    • A 20 patch OECF grayscale pattern* is used instead of the 16 patch version.
    • The Focus Patterns in the centers of the squares are rectangular (to increase the MTF measurement area) and are designed to reduce interference with automatic edge detection.
    • 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.

    Enhanced Version

    Enhanced Version

    The Imatest Enhanced ISO 12233:2014 E-SFR chart has all the features of the Standard chart, keeping the 3:2 aspect ratio, with the addition of six added slanted squaresfor measuring performance near the image boundaries and hyperbolic wedges for visual analysis or analysis with the Imatest Wedge module. It also has 16 color patches when produced with technologies that allow color. Since these additions are in regions of the chart not covered by the standard, compliance with the standard is unaffected.

    The differences between the Imatest charts and the chart illustrated in the standard are listed below. Even with these differences the Imatest chart is in full compliance with the standard.

    • A 20 patch OECF grayscale pattern* is used as opposed to the 16 patch version.
    • The Focus Patterns in the centers of the squares are rectangular (to increase the MTF measurement area) and are designed to reduce interference with automatic edge detection.
    • 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.

    The differences between the Enhanced and Standard Versions are as follows:

    • Six extra slanted squares are added for measuring performance near the image boundaries.
    • Several hyperbolic wedges with spatial frequencies, similar to the CIPA chart referenced in the ISO standard, for visual analysis or use with the Imatest Wedge module.
    • 16 color patches when produced with technologies that allow color (inkjet or color LVT), with colors similar to the industry-standard 24-color test chart.

    This chart will work with the fully-automated eSFR ISO module.


    The values of the 11-graduated gray scale are as follows:

    StepDensityReflectance in %
    10.0589
    20.1374
    30.2260
    40.3248
    50.4337
    60.5528
    70.6920
    80.8813
    91.068
    101.315
    111.652

    The density values are based on BaSo4 = 0. Two black fields and a white field are located between the gray scales, the density of the black filed is D > 2.4 (reflectance < 0.5 %). The density of the white filed is D = 0.05 (reflectance = 89.9 %).


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