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Imatest Documentation QPcard 201 Step charts (reflective): Kodak Q-13, Q-14, etc. Step charts (transmissive): Stouffer T4110, etc. Log Frequency, Log F-Contrast (sine or bar) Test images Siemens star chart Color accuracy, Tonal response Tonal response, Contrast, Noise, Exposure accuracy, Veiling glare Dynamic range, Tonal response, Contrast, Noise Sharpness, Color moiré, Detail lost to software noise reduction Multicharts Inexpensive chart Stepchart, Multicharts. Dynamic Range Veiling glare is measured with "black hole" next to the Q-13. May be purchased from professional camera stores or Danes-Picta. Stepchart Best for measuring dynamic range Rescharts Log Frequency, Log F-Contrast Sharpness Star chart MTF is a check on the slanted-edge method; more direct but less accurate. Imatest Master only. May be created for printing by Test Charts or purchased from Image Engineering. These images were put online for testing Imatest API/EXE, but they are generally useful for testing Imatest. This is not a comprehensive list of charts, which can be found in the above table. Module Image file Description SFR Colorcheck Stepchart 64kB SFR_webcam_A_custom_80cm.jpg 125 kB SFR_webcam_A_ISO_80cm.jpg 77 kB GMB_Q-14_webcam.jpg 248 kB Stepchart_DR_Canon_G2.JPG (image in Colorcheck, above) GMB_Q-14_webcam.jpg 1.68 MB Stepchart_OECF_1159.JPG Webcam image of high and medium contrast custom charts created by Test Charts and printed on an Epson R2400 printer: these can have larger regions of interest (ROIs) than the ISO 12233 chart below. Webcam image of ISO 12233 chart. At this distance the available regions of interest are very small. Webcam image of the Kodak Q-14 grayscale and GretagMacbeth ColorChecker. Image of the Stouffer T4110 transmission test chart taken with the Canon Powershot G2. Excellent dynamic range measurement. Webcam image of the Kodak Q-14 grayscale and GretagMacbeth ColorChecker. 12-patch OECF chart (for API and Imatest Master only ). Available from Applied Image. 424 of 451
Imatest Documentation Distortion Uniformity (Light Falloff) Log F-Contrast Algorithms 1.72 MB Stepchart_Can_TS90_8_1869.JPG 204 kB distortion_webcam_a.jpg 185 kB uniformity_1600_JPEG80.jpg 92 kB Rescharts Log Frequency-Contrast jpeg Module Algorithm link Brief description Stepchart www.imatest.com/docs /q13.com#Algorithm SFR www.imatest.com/docs /sharpness.com#calc Image of Kodak Q-14 chart with "black hole" cavity for measuring veiling glare (susceptibility to lens flare) Webcam image of distortion grid. Image of nearly uniformly illuminated surface taken with the Canon 10-22mm lens on the EOS-20D, f/4.5, 22mm, ISO 1600. Image Log-Frequency-Contrast chart (cropped), acquired by the EOS-20D camera, 24-70mm f/2.8L lens set at 42mm, f/5.6, ISO 100. Can also be used with Log Frequency. Slanted-edge MTF measurement. The calculation is derived from ISO-12233. The average edge is calculated using a 4x oversampling binning algorithm. MTF is the Fourier transform of the derivative of the differentiated edge (the average line spread function (LSF)). The Imatest algorithm is more immune to noise and lens distortion than the standard ISO algorithm, which can be selected in a checkbox if desired. 425 of 451
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Imatest Documentation © 2009 Imate
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Imatest Documentation Using SFRplus
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Imatest Documentation Image Quality
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Imatest Documentation tilted (about
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Imatest Documentation MTF50 in Line
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Imatest Documentation Kodak Q-14 St
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Imatest Documentation Targets Chart
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Imatest Documentation Distortion ta
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Imatest Documentation Diagnostics r
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Imatest Documentation A horizontal
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Imatest Documentation Epson 2200 Pr
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Imatest Documentation SFR results:
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Imatest Documentation Right column
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Imatest Documentation Right: Input
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Imatest Documentation Multi-ROI 2D
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Imatest Documentation MTF contours
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Imatest Documentation SFRplus SFR H
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Imatest Documentation Log F-Contras
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Imatest Documentation Log Frequency
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Imatest Documentation Color moiré
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Imatest Documentation Batchview Pos
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Imatest Documentation Rescharts SFR
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Imatest Documentation Running Batch
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Imatest Documentation SFR input dia
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Imatest Documentation Figures (.PNG
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Imatest Documentation QA-61 ISO-160
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Imatest Documentation ISO-15739 Noi
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Imatest Documentation You can enter
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Imatest Documentation Results If RA
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Imatest Documentation Dynamic range
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Imatest Documentation Using Colorch
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Imatest Documentation horizontal fi
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Imatest Documentation Colorcheck in
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Imatest Documentation CMC An early
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Imatest Documentation Color correct
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Imatest Documentation The Labsphere
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Imatest Documentation Using Distort
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Imatest Documentation Set exposure
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Imatest Documentation MTF (sharpnes
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Imatest Documentation Preview image
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Imatest Documentation Light Falloff
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