Color/Tone Special (multi-row) charts

Additional charts, including circles arranged on a square 7-patch pie chart   Special (multi-row) Charts (a part of Color/Tone, available with Imatest™ Master) analyzes — patterns consisting of 7 to 12 squares uniformly distributed around a circle, including portions of monochrome or color “pie” charts similar to the one shown on the left. These charts are useful for microscopy and for systems with significant light falloff (vignetting). — any of the monochrome test charts shown below, which can also be analyzed by Stepchart. They are described in detail in Stepchart: Special and ISO charts.       QA-61 ISO-16067-1 Scanner QA-62 […]

Color/Tone Auto: fixed (batch-capable) analysis

Analyze color and grayscale test charts in a fixed batch-capable module Color/Tone Auto (Multitest) incorporates all calculations in Color/Tone Setup (Multicharts), Colorcheck, and Stepchart. News–  Imatest 2020.1  We have added support for the TE269V2 dynamic range chart. Imatest 5.2: We’ve changed the name Multitest to Color/Tone Auto, but we’ll continue to use Multitest for a while (for example, for Imatest IT). Imatest 5.1: (starting December 2018)  The exposure error calculation has been improved to be more consistent over a range of contrast (gamma) values. Details here. Color/ToneSetup and Color/Tone Auto can now measure temporal noise and SNR. With this enhancement, these two new modules have […]

Color/Tone and Colorcheck Appendix

  Algorithms and reference formulas This page contains algorithms and reference formulas for Colorcheck, Color/Tone Setup and Color/Tone Auto. It’s mostly in green text because it’s all math.   RGB to CIELAB (L*a*b*) – Color difference formulas – CIE 1976 – CIE 1994  – CIEDE2000 – Delta-C  Color ellipses(ΔC ab, ΔC 94, ΔC 2000) – Color difference visualizer – Chroma correction (corr) – Algorithm Grayscale and Exposure error (fix in 5.1+) Background reading:  We frequently get difficult questions about color spaces, color space white points, illuminants for measuring CIELAB reference files, color temperatures for measuring images, how to transform between them, and more. […]

Color/Tone Special (multi-row) charts

Additional charts, including circles arranged on a square 7-patch pie chart   Special (multi-row) Charts (a part of Color/Tone, available with Imatest™ Master) analyzes — patterns consisting of 7 to 12 squares uniformly distributed around a circle, including portions of monochrome or color “pie” charts similar to the one shown on the left. These charts are useful for microscopy and for systems with significant light falloff (vignetting). — any of the monochrome test charts shown below, which can also be analyzed by Stepchart. They are described in detail in Stepchart: Special and ISO charts.       QA-61 ISO-16067-1 Scanner QA-62 […]

Color/Tone Auto: fixed (batch-capable) analysis

Analyze color and grayscale test charts in a fixed batch-capable module Color/Tone Auto (formerly Multitest) incorporates all calculations in Color/Tone Setup, Colorcheck, and Stepchart.  News–  Imatest 2020.1  We have added support for the TE269V2 dynamic range chart. Imatest 5.2: We’ve changed the name Multitest to Color/Tone Auto, but we’ll continue to use Multitest for a while (for example, for Imatest IT). Imatest 5.1: (starting December 2018)  The exposure error calculation has been improved to be more consistent over a range of contrast (gamma) values. Details here. Color/ToneSetup and Color/Tone Auto can now measure temporal noise and SNR. With this enhancement, these two new modules have […]

Color/Tone and Colorcheck Appendix

Algorithms and reference formulas This page contains algorithms and reference formulas for Colorcheck, Color/Tone Setup and Color/Tone Auto. It’s mostly in green text because it’s all math.   RGB to CIELAB (L*a*b*) – Color difference formulas – CIE 1976 – CIE 1994  – CIEDE2000 – Delta-C  Color ellipses(ΔC ab, ΔC 94, ΔC 2000) – Color difference visualizer – Chroma correction (corr) – Algorithm Grayscale and Exposure error (fix in 5.1+) Background reading:  We frequently get difficult questions about color spaces, color space white points, illuminants for measuring CIELAB reference files, color temperatures for measuring images, how to transform between them, and more. To […]

Introducing Imatest 5.2

BOULDER, CO -September 12, 2019—Imatest, a global image quality testing solution provider is pleased to announce Imatest 5.2. With this new Imatest release, the Imatest team adds several new features to provide better analysis tools and new options.

Change Log

To obtain the latest version of Imatest (for updates, new installations, and trial as well as and full versions) go to Imatest Download. Imatest perpetual license holders are entitled to free updates for one year from the date of purchase. After that you need to renew. If your license is not current, you can download and install the version that was current one year after the purchase date. Join Imatest’s Pilot Program and gain early access to new Imatest features and bug fixes. Your feedback is incorporated into each official release to ensure you receive a seamless transition to new versions. […]