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About disk optimization with Mac OS X. The following information might be of help if the VST Performance Meter in one of our applications is showing an unusually high load or even drop-outs and peaks are visible and audible. If the latency is very low which is corresponding to a very small buffer size time might be too short for proper signal processing. Please refer to the manual of the corresponding audio interface for details. Updating the audio driver might also improve the overall system performance and allow using latencies which weren't usable before.

On some Macs it is possible to adjust the processor's performance in order to save battery power. For details, please refer to this article. Please note that certain "VST bridged" plug-ins create high processor loads and can cause performance issues. In general, it is recommended to use current plug-in versions that run natively on Intel-based Macs, if available. Check the plug-in manufacturer's site for update if you experience performance troubles with a PowerPC plug-in. Photoshop normally uses relative colorimetric with black point compensation, but can use different intents via custom soft proofing settings.

Controls the order in which the patches of a testchart are measured. The other choices detailed below are aimed at potentially dealing better with displays employing ASBL automatic static brightness limiting leading to distorted measurements, and should be used together with display white level drift compensation although overall measurement time will increase somewhat by using either option. If your display doesn't have ASBL issues, there is no need to change this settting. Which of the choices works best on your ASBL display depends on how the display detects wether it should reduce light output.

The provided default testcharts should work well in most situations, but allowing you to create custom charts ensures maximum flexibility when characterizing a display and can improve profiling accuracy and efficiency. See also optimizing testcharts. You can enter the amount of patches to be generated for each patch type white, black, gray, single channel, iterative and multidimensional cube steps.

The iterative algorythm can be tuned if more than zero patches are to be generated. The assumed XYZ numbers can be influenced by providing a previous profile, thus allowing optimized test point placement. You can set the degree of adaptation to the known device characteristics used by the default full spread OFPS algorithm.

A preconditioning profile should be provided if adaptation is set above a low level. For the body centered grid distributions, the angle parameter sets the overall angle that the grid distribution has. A value greater than 1. Note that the device model used to create the expected patch values will not take into account the applied power, nor will the more complex full spread algorithms correctly take into account the power.

The neutral axis emphasis parameter allows changing the degree to which the patch distribution should emphasise the neutral axis. Since the neutral axis is regarded as the most visually critical area of the color space, it can help maximize the quality of the resulting profile to place more measurement patches in this region. This emphasis is only effective for perceptual patch distributions, and for the default OFPS distribution if the adaptation parameter is set to a high value.

It is also most effective when a preconditioning profile is provided, since this is the only way that neutral can be determined. The dark region emphasis parameter allows changing the degree to which the patch distribution should emphasis dark region of the device response. Display devices used for video or film reproduction are typically viewed in dark viewing environments with no strong white reference, and typically employ a range of brightness levels in different scenes.

This often means that the devices dark region response is of particular importance, so increasing the relative number of sample points in the dark region may improve the balance of accuracy of the resulting profile for video or film reproduction. This emphasis is only effective for perceptual patch distributions where a preconditioning profile is provided. A scaled down version of this parameter will be passed on to the profiler. Note that increasing the proportion of dark patches will typically lengthen the time that an instrument takes to read the whole chart.

Only test points within the sphere defined by it's center and radius will be in the generated testchart. This can be good for targeting supplemental test points at a troublesome area of a device. Note that the actual number of points generated can be hard to predict, and will depend on the type of generation used. If the OFPS, device and perceptual space random and device space filling quasi-random methods are used, then the target number of points will be achieved.

All other means of generating points will generate a smaller number of test points than expected. For this reason, the device space filling quasi-random method is probably the easiest to use. You can generate 3D views in several formats. You can choose the colorspace s you want to view the results in and also control whether to use RGB black offset which will lighten up dark colors so they are better visible and whether you want white to be neutral. All of these options are purely visual and will not influence the actual test patches. This prevents those patches affecting the iterative patch distribution, with the drawback of making the patch distribution less even.

This is an experimental feature. If you want to insert a certain amount of patches generated in a spreadsheet application as RGB coordinates in the range 0. As long as you do not enter your own text here, the profile name is auto generated from the chosen calibration and profiling options. The current auto naming mechanism creates quite verbose names which are not necessarily nice to read, but they can help in identifying the profile. Also note that the profile name is not only used for the resulting profile, but for all intermediate files as well filename extensions are added automatically and all files are stored in a folder of that name.

You can choose where this folder is created by clicking the disk icon next to the field it defaults to your system's default location for user data.

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Here's an example under Linux, on other platforms some file extensions and the location of the home directory will differ. See User data and configuration file locations. You can mouse over the filenames to get a tooltip with a short description what the file is for:. Please let the screen stabilize for at least half an hour after powering it up before doing any measurements or assessing its color properties. The screen can be used normally with other applications during that time. The main window will hide during measurements, and should pop up again after they are completed or after an error.

After the adjustments, you can run a check on all the settings by choosing the last option from the left-hand menu to verify the achieved values. If adjusting one setting adversely affected another, you can then simply repeat the respective option as necessary until the target parameters are met. Depending on the instrument you're using you may want to get a coffee or two as the process can take a fair amount of time, especially if you selected a slow speed level.

Otherwise, you may be forced to take the instrument off the screen to do a sensor self-calibration before starting the profiling measurements. Optimization will happen automatically as part of the profiling measurements this will increase measurement and processing times by a certain degree. Alternatively, if you want to do generate an optimized chart manually prior to a new profiling run, you could go about this in the following way:. When installing a profile after creating or updating it, a startup item to load its calibration curves automatically on login will be created on Windows and Linux, Mac OS X does not need a loader.

Under Windows, the profile loader will stay in the taskbar tray and keep the calibration loaded unless started with the --oneshot argument, which will make the loader exit after loading calibration. In addition, the profile loader is madVR -aware and will disable calibration loading if it detects e. You can double-click the profile loader system tray icon to instantly re-apply the currently selected calibration state see below.

A single click will show a popup with currently associated profiles and calibration information. A right-click menu allows you to set the desired calibration state and a few other options:. You will be asked to install or save the 3D LUT directly after it was created.

You can do verification measurements to assess the display chain's display profile - video card and the calibration curves in its gamma table - monitor fit to the measured data, or to find out about the soft proofing capabilities of the display chain. The measured values are then compared to the values obtained by feeding the device RGB numbers through the display profile measured vs expected values.

The default verification chart contains 26 patches and can be used, for example, to check if a display needs to be re-profiled. The profile that is to be evaluated can be chosen freely. The report files generated after the verification measurements are plain HTML with some embedded JavaScript, and are fully self-contained. There are two sets of default verification charts in different sizes, one for general use and one for Rec.

Also, you can create your own customized verification charts with the testchart editor. In this case, you want to use a testchart with RGB device values and no simulation profile. Other settings that do not apply in this case will be grayed out. This depends on the chart that was measured. Be warned though, only wide-gamut displays will handle a larger offset printing colorspace like FOGRA39 or similar well enough. In both cases, you should check that atleast the nominal tolerances are not exceeded. It is perfectly possible to obtain good verification results but the actual visual performance being sub-par.


Keep all that in mind when admiring or pulling your hair out over verification results :. Different softwares use different methods which are not always disclosed in detail to compare and evaluate measurements. There are currently two slightly different paths depending if a testchart or reference file is used for the verification measurements, as outlined above.

Then, the original RGB values from the testchart, or the looked up RGB values for a reference are sent to the display through the calibration curves of the profile that is going to be evaluated. The assumed target whitepoint color temperature shown is simply the rounded correlated color temparature K threshold calculated from the measured XYZ values. The XYZ values for the assumed target whitepoint are obtained by calculating the chromaticity xy coordinates of a CIE D daylight or blackbody illuminant of that color temperature and converting them to XYZ.

You can find all the used formulas on Bruce Lindbloom's website and on Wikipedia. This mode is useful when checking softproofing results using a CMYK simulation profile, and will be automatically enabled if you used whitepoint simulation during verification setup without enabling whitepoint simulation relative to the profile whitepoint true absolute colorimetric mode.

When using ArgyllCMS 1. The remote device needs to be able to run a web browser Firefox recommended , and the local machine running DisplayCAL may need firewall rules added or altered to allow incoming connections. NOTE: If you use this method of displaying test patches, there is no access to the display video LUT [7] s and hardware calibration is not possible. The colors will be displayed with 8 bit per component precision, and any screen-saver or power-saver will not be automatically disabled.

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Note: Close the web browser window or tab after each run, otherwise reconnection may fail upon further runs. Since version 2. Untethered mode is another option to measure and profile a remote display that is not connected via standard means calibration is not supported. To use untethered mode, the testchart that should be used needs to be optimized, then exported as image files via the testchart editor and those image files need to be displayed on the device that should be measured, in successive order.

The procedure is as follows:. Use whatever means available to you to cycle through the images from first to last, carefully monitoring the measurement process and only changing to the next image if the current one has been successfully measured as will be shown in the untethered measurement window. Note that untethered mode will be atleast twice as slow as normal display measurements. There is a bit of functionality that is not available via the UI and needs to be run from a command prompt or ternminal. Use of this functionality currently requires running from source.

Note that Windows calibration loading is of lower quality than using ArgyllCMS because Windows always quantizes the calibration to 8 bit and scales it wrongly. The --os option determines wether Windows calibration loading functionality should be enbaled or disabled. DisplayCAL supports scripting locally and over the network the latter must be explicitly enabled by setting app.

DisplayCAL must be already running on the target machine for this to work.

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Below is an example connecting to a running instance on the default port and starting calibration measurements the port is configurable in DisplayCAL. You can read the actual used port from the file DisplayCAL. The example is written in Python and deals with some of the intricacies of sockets as well. Each command needs to be terminated with a newline character after any arguments the command may accept. Note that data sent must be UTF-8 encoded, and if arguments contain spaces they should be encased in double or single quotes. The common return values for commands are either ok in case the command was understood note that this does not indicate if the command finished processing , busy or blocked in case the command was ignored because another operation was running or a modal dialog blocks the UI, failed in case the command or an argument could not be processed successfully, forbidden in case the command was not allowed this may be a temporary condition depending on the circumstances, e.

Other return values are possible depending on the command. All values returned are UTF-8 encoded. If the return value is blocked e. Below is a list of the currently supported commands the list contains all valid commands for the main application, the standalone tools will typically just support a smaller subset.

Note that filename arguments must refer to files present on the target machine running DisplayCAL. There are a few things to be aware of when using commands that interact with the UI directly i. If an object's ID is negative, it means that it has been automatically assigned at object creation time and is only valid during the lifetime of the object i.

Another possibility is to use an object's label, which while also not guaranteed to be unique, still has a fairly high likelihood of being unique for controls that share the same parent window, but has the drawback that it is localized although you can ensure a specific UI language by calling setlanguage and is subject to change when the localization is updated.

Sequential operations: Calling commands that interact with the UI in rapid succession may require the use of additional delays between sending commands to allow the GUI to react so getstate will return the actual UI state after a specific command , although there is a default delay for commands that interact with the UI of atleast 55 ms. Setting values: If setting a value on an UI element returns ok , this is not always an indication that the value was actually changed, but only that the attempt to set the value has not failed, i. Also, not all controls may offer a comprehensive scripting interface.

I'm open to suggestions though. DisplayCAL uses the following folders for configuration, logfiles and storage the storage directory is configurable. Need help with a specific task or problem? If you want to report a bug, please see the guidelines on bug reporting. Otherwise, feel free to use one of the following channels:. Found a bug? If so, please first check the issue tracker , it may have been reported already. Otherwise, please follow these guidelines for reporting bugs:. As the folder may contain several logfiles, it is a good idea to compress the whole folder to a ZIP or tar.

Please note the logfiles may contain your username as well as paths of files you may have used in DisplayCAL. I will respect your privacy at all times, but you may want to consider this when attaching logfiles to public places like the issue tracker. Create a new ticket or if the bug has been reported already, use the existing ticket at the issue tracker , following the guidelines above, and attach the logfiles archive. If you don't want to or can't use the bug tracker, feel free to use one of the other support channels. Do you want to get in touch with me or other users regarding DisplayCAL or related topics?

The general discussion forum is a good place to do so. You can also contact me directly. Part of the comprehensive ArgyllCMS documentation has been used in this document, and was only slightly altered to better fit DisplayCAL's behavior and notations. News Forums Issue Tracker Wiki. Your support is appreciated! About DisplayCAL DisplayCAL formerly known as dispcalGUI is a display calibration and profiling solution with a focus on accuracy and versatility in fact, the author is of the honest opinion it may be the most accurate and versatile ICC compatible display profiling solution available anywhere.

Other features include: Support of colorimeter corrections for different display device types to increase the absolute accuracy of colorimeters. Corrections can be imported from vendor software or created from measurements if a spectrometer is available. Check display device uniformity via measurements. Create synthetic ICC profiles with custom primaries, white- and blackpoint as well as tone response for use as working spaces or source profiles in device linking 3D LUT transforms. Installer Package If you want to verify the integrity of the downloaded file, compare its SHA checksum to that of the respective entry in the SHA checksum list.

Installer recommended or ZIP archive If you want to verify the integrity of the downloaded file, compare its SHA checksum to that of the respective entry in the SHA checksum list case does not matter. Source Tarball If you want to verify the integrity of the downloaded file, compare its SHA checksum to that of the respective entry in the SHA checksum list. Quickstart guide This short guide intends to get you up and running quickly, but if you run into a problem, please refer to the full prerequisites and installation sections. Connect your measurement device to your computer. That's it! Hardware requirements Minimum: 1 GHz single core processor, 1.

Supported instruments You need one of the supported instruments to make measurements.


Additional requirements for using the source code You can skip this section if you downloaded a package, installer, ZIP archive or disk image of DisplayCAL for your operating system and do not want to run from source. Additional requirements for compiling the C extension module Normally you can skip this section as the source code contains pre-compiled versions of the C extension module that DisplayCAL uses. On Mac OS X before If you're using the official python. Running directly from source After satisfying all additional requirements for using the source code , you can simply run any of the included.

One-time setup instructions for source code checked out from SVN: Run python2 setup. Linux package. Windows Installer Launch the installer which will guide you trough the required setup steps. Prerequisites: You first need to install alien and rpmdb, create a dummy RPM database via sudo rpmdb --initdb , then edit or create from scratch the setup.

If you are using Ubuntu This is no longer an issue with py2app 0. Successful MSI creation needs a patched msilib additional information. You can specify the same options as for the install command. The original setup. Useful in combination with the uninstall command to see which files would be removed. This is actually a switch, use it once and the choice is remembered until you specify the --use-setuptools switch see next paragraph. This is actually a switch, use it once and the choice is remembered until you specify the --use-distutils switch see above.

Basic concept of display calibration and profiling If you have previous experience, skip ahead. Usage Through the main window, you can choose your settings. Settings file Here, you can load a preset, or a calibration. Why has a default gamma of 2. Tabs The main user interface is divided into tabs, with each tab containing a sub-set of settings. Apart from those directly connected displays, a few additional options are also available: Web localhost Starts a standalone web server on your machine, which then allows a local or remote web browser to display the color test patches, e.

Prisma The Q, Inc. Resolve Allows you to use the built-in pattern generator of DaVinci Resolve video editing and grading software, which is accessible over the network or on the local machine.

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  8. Untethered See untethered display measurements. Choosing a measurement mode Some instruments may support different measurement modes for different types of display devices. Calibration settings Interactive display adjustment Turning this off skips straight to calibration or profiling measurements instead of giving you the opportunity to alter the display's controls first.

    You will normally want to keep this checked, to be able to use the controls to get closer to the chosen target characteristics. Observer To see this setting, you need to have an instrument that supports spectral readings i. White point Allows setting the target white point locus to the equivalent of a daylight or black body spectrum of the given temperature in degrees Kelvin, or as chromaticity co-ordinates.

    Visual whitepoint editor The visual whitepoint editor allows visually adjusting the whitepoint on display devices that lack hardware controls as well as match several displays to one another or a reference. For table based profiles LUT [7] , it sets the main lookup table size, and hence quality in the resulting profile. White point If your screen has RGB gain, colortemperature or other whitepoint controls, the first step should be adjusting the whitepoint.

    Look at the bars shown during the measurements to adjust RGB gains and minimize the delta E to the target whitepoint. White level Continue with the white level adjustment. If you have set a target white level, you may reduce or increase the brightness of your screen ideally using only the backlight until the desired value is reached i. If you haven't set a target, simply adjust the screen to a visually pleasing brightness that doesn't cause eye strain.

    You may reduce or increase the brightness of your screen until the desired black level is reached i. White point The next step should be adjusting the whitepoint, using the display's RGB gain controls or other means of adjusting the whitepoint. If you have set a target white level, you may reduce or increase contrast until the desired value is reached i. If you haven't set a target, simply adjust the screen to a visually pleasing level that doesn't cause eye strain.

    Is there a way to easily type these characters with touching my mouse or need to copy-paste? Niels R. Make sure you understand the nature of the superscript. In some cases there are fonts that have superscript numeral characters. In other cases a word processor creates the image of a superscript by taking a regular numeral character, displaying it in a smaller font, and shifting the placement of the character higher up from the baseline of the rest of the text.

    There are some important gotchas with the other solutions posted here. Custom keyboard layouts to the rescue Luckily, remapping keys can be done in a way that will work for any type of application, and without any additional software! How to install a custom keyboard layout Copy the.

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    Reboot if you installed the layout system-wide , or log out and log in again if you installed it for the current user only. How to make a custom keyboard layout the system default Optionally, you could make the custom keyboard layout the system default by running the Setup Assistant with root privileges. Mathias Bynens Mathias Bynens 7, 10 10 gold badges 53 53 silver badges 98 98 bronze badges. One of the "other solutions posted here" is in fact to make a custom keymap using Ukelele. But your extensive explanation is of course a very useful addition. See apple.

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    I suspect you might be able to do that if you could figure out how to insert your custom layout into the AppleKeyboardLayouts. I know that is still on beta, but I'll add here anyway. Or you can run this command once in Terminal, and it will change the default for every web view: defaults write -g WebAutomaticTextReplacementEnabled -bool true This is from Macworld , but the Macworld article assumes Lion would make this step unnecessary. Steven Fisher Steven Fisher 1, 1 1 gold badge 12 12 silver badges 25 25 bronze badges.

    This is reeeeally nice! This only works in Cocoa applications, though. However, most Carbon apps have Cocoa interfaces these days.

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    Certainly, this'll work with any 64 bit app. Another handy one I use is for my email address. Senseful Senseful Tom Gewecke Tom Gewecke 4 4 silver badges 5 5 bronze badges.