The PatchTool Display-Check tool is designed to make display measurements from preset patches (Quick-Test menu) or from any color list opened in PatchTool (PatchTool file menu). A Quick-Test consists of patches defining a Neutral ramp with or without ramps for the R, G, and B primaries. When doing a Quick-Test, you have to select a profile for the Source; the Destination profile is the ICC profile assigned by the OS to the display on which the Display-Check window appears. You can choose a built-in PatchTool RGB space or assign an ICC profile. When doing a Display-Check with a PatchTool file, the Source profile cannot be selected in this dialog. Display-Check will assign the file XYZ/L*a*b* data to the PCS, which will then be converted to the Destination profile. However, you do have some control on the Source, depending on the data type selected when importing (opening) the file; also, there is the option to use the file RGB values directly. Please consult the Help manual for more information. The measured values are presented against the reference values in a Compare window, which includes a "Stats" tab where you can perform a statistical analysis on the differences for any color parameter. When selecting a Quick-Test, an additional "Display data" tab will appear in the Compare window, and when a Quick- Test with Neutral and RGB ramps are measured, you will also see a chromaticity diagram in the "xy graph" tab. An illustrated step-by-step presentation on how to use PatchTool to measure and check your monitor's colorimetric accuracy according to Idealliance monitor proofing certification requirements can be downloaded from the Tutorials page (look for the AN-3a and AN-4a Application Notes). An example of the statistics obtained when proofing a monitor is shown in this page (PatchTool Compare Stats), and here is an example of a certification report (Note: the report was converted to the PDF format using another application). Focus Numérique, a French Web magazine dedicated to Photo, Video, and Digital images, uses PatchTool's Display-Check to analyze color monitors. For example, here is a link to their ViewSonic VP2780-4K test results. Focus Numérique, un magasine en ligne dédié à la photo et vidéo numérique utilise Display-Check de PatchTool pour analyser ses moniteurs. Par exemple, voici un lien vers les résultats obtenus avec le moniteur VP2780-4K de ViewSonic. Please consult Appendix B of PatchTool's Help manual, available as a separate download, for a detailed description of how color management is handled within PatchTool. SUPPORTED INSTRUMENTS (display measurements) For the macOS 64 bit package: • i1Display Pro colorimeter (X-Rite retail version, part #EODIS3-XR). Generic models sold by other companies (third parties, or OEM, part #EODIS- OEM) should also be compatible. Custom models sold by other companies may be supported if the instrument is recognized to be an i1Display Pro by PatchTool. • i1Pro (X-Rite, formerly GretagMacbeth). Supported models: Rev A-D. • i1Pro 2 (X-Rite). Supported models: i1Pro 2 M0/M1/M2 and i1Pro 2 M2-only. • i1Pro 3 (X-Rite). Supported models: i1Pro 3 and i1Pro 3 Plus. (New in V-7.0) • Spyder5 (Datacolor). Supported models: Spyder5ELITE, Spyder5PRO, Spyder5EXPRESS. • SpyderX (Datacolor). Supported models: SpyderX Elite, SpyderX Pro. (New in V-6.6) For the Windows OS 64 bit package: • Eye-One Display and Display 2 (X-Rite, formerly GretagMacbeth) • Eye-One Display 2 bundled with a monitor: If an instrument is recognized to be an Eye-One Display or Eye-One Display 2 by PatchTool, then it can be used in the program and will provide accurate measurements. Example-1: The MDSVSENSOR2, which is part of the SVII-PRO-KIT sold by NEC for their wide gamut Spectraview displays, such as the PA271W model, is compatible with PatchTool; please consult the Display-Check section of the Help manual for more information. Example-2: The Eye-One Display offered with HP DreamColor monitors is NOT compatible with PatchTool. • i1Display Pro colorimeter (X-Rite retail version, part #EODIS3-XR). Generic models sold by other companies (third parties, or OEM, part #EODIS- OEM) should also be compatible. Custom models sold by other companies may be supported if the instrument is recognized to be an i1Display Pro by PatchTool. • i1Pro (X-Rite, formerly GretagMacbeth). Supported models: Rev A-D. • i1Pro 2 (X-Rite). Supported models: i1Pro 2 M0/M1/M2 and i1Pro 2 M2-only. • i1Pro 3 (X-Rite). Supported models: i1Pro 3 and i1Pro 3 Plus. (New in V-7.0) For the Windows OS 32 bit package (runs on Windows OS 32 bit and 64 bit): • All the instruments listed for the Windows OS 64 bit package PLUS the following instruments: • DTP94 (X-Rite, formerly MonacoOPTIX) The DTP94 drivers are not compatible with Windows 8 and Windows 10; however, a solution is proposed in this forum post: http://www.dpreview.com/forums/post/57030496 Note: You will find the DTP94 V-3.1.0.0 drivers in the “drivers” folder of the PatchTool application folder; the files all start with “XrUsb…” • Spyder2 (Datacolor) • Spyder3 (Datacolor) • Spyder4 (Datacolor). Supported models: Spyder4ELITE, Spyder4PRO, Spyder4EXPRESS. • Spyder5 (Datacolor). Supported models: Spyder5ELITE, Spyder5PRO, Spyder5EXPRESS. • SpyderX (Datacolor). Supported models: SpyderX Elite, SpyderX Pro. (New in V-6.6).

From the top-left, clockwise: DTP94, Eye-One Display2, i1Pro, Spyder2, Spyder3 (i1Display Pro, i1Pro 2, and Spyder4 not shown).

COLOR CORRECTION MATRIX A Color Correction Matrix can be assigned to all the instruments supported by PatchTool, as shown just below for the DTP94. The Correction Matrix can be loaded from a dialog, shown further below, which is opened by clicking on the "Select Matrix" button. A matrix can also be assigned to an instrument from the Correction Matrix tool.