They include all Stepchart capabilities.įixed (batch-capable) module for measuring color and grayscale charts. Color/Tone Interactive and Auto share most INI file settings. Supports several measurements not in Stepchart, including ISO noise, sensor dynamic range, and Contrast Resolution. Best when you need to closely examine the results. Interactive module for measuring color and grayscale charts. 2017), but we’re working on it.Ĭolor/Tone Interactive or Auto are recommended: they are newer and more versatile than Stepchart. Not yet an industry standard (as of Sept. A better indication of true usable DR than traditional measurements. Measures the visibility of low contrast features over a wide tonal range. The test chart does not have to have as large a tonal range as the DR, but transmissive charts with tonal range ≥ 3 are recommended. Remove pixel offset (pedestal) if present.īeware tone-mapped images, often recognizable by very low gamma ( 1.6) should be printed on glossy or semigloss media.įits raw data to an equation from the EMVA 1288 standard, then extrapolates to find DR. Take great care to avoid stray light and reflections.įrame the chart so it occupies the central portion of the image (for most medium-high resolution cameras).Įnter a reference file to obtain valid results with transmissive Dynamic Range charts. The environment should be completely darkened. Tips and recommendations – Tone mapping – Offsets – More on Flare – Flare light-limited DR How to measure DR – Overexposure – Minimizing reflections – Contrast Resolution chart System DR – Flare, Charts, Exposure – DR definitions – T ransmission chart – Lightbox Making Dynamic Range Measurements Robust Against Flare Light Veiling glare (lens flare) describes several measurement techniques, including the new Contrast Resolution method.Ĭontrast Resolution – A special transmissive chart for measuring the visibility of low contrast features in larger fields over a wide dynamic range Image Quality Video Series: Dynamic Range
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