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author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-09-01 13:56:46 +0200 |
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committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-09-01 13:56:46 +0200 |
commit | 22f703cab05b7cd368f4de9e03991b7664dc5022 (patch) | |
tree | 6f4d50beaa42328e24b1c6b56b6ec059e4ef21a5 /doc/spotread.html |
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diff --git a/doc/spotread.html b/doc/spotread.html new file mode 100644 index 0000000..0259530 --- /dev/null +++ b/doc/spotread.html @@ -0,0 +1,1011 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<html> + <head> + <title>spotread</title> + <meta http-equiv="content-type" content="text/html; + charset=ISO-8859-1"> + <meta name="author" content="Graeme Gill"> + </head> + <body> + <h2><b>spectro/spotread</b></h2> + <h3>Summary</h3> + Use an instrument to read a single color value. This can be a useful + diagnostic aid. + <h3>Usage Summary</h3> + <small><span style="font-family: monospace;">spotread [-options] + [logfile]</span><br style="font-family: monospace;"> + <span style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#v">-v</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + Verbose mode</span><br style="font-family: + monospace;"> + <span style="font-family: monospace;"></span><span + style="font-family: monospace;"> </span></small><small><span + style="font-family: monospace;"></span><a style=" font-family: + monospace;" href="#s">-s</a><span style="font-family: + monospace;"> + + + + + + + + + + + + + + + Print spectrum for each reading.</span></small><br + style="font-family: monospace;"> + <small><span style="font-family: monospace;"></span><span + style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#S">-S</a><span + style="font-family: monospace;"> + + Plot the spectrum in a graph window.</span><br + style="font-family: monospace;"> + <span style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#c">-c comport</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + Set COM port, 1..4 (default 1)</span><span style="font-family: + monospace;"></span><span style="font-family: monospace;"><br + style="font-family: monospace;"> + </span><span style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#t">-t</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + Use transmission measurement mode</span><br + style="font-family: monospace;"> + <span style="font-family: monospace;"> </span><a style=" + font-family: monospace;" href="#e">-e</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use emissive measurement mode (absolute results)<br> + </span></small><small><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#eb">-eb</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use display white brightness relative measurement mode<br> + </span></small><small><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#ew">-ew</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use display white relative measurement mode<br> + </span></small><small><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#p">-p</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use telephoto measurement mode (absolute results)<br> + </span></small><small><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#pb">-pb</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use </span></small><small><span style="font-family: monospace;">projector</span></small><small><span + style="font-family: monospace;"> white brightness relative + measurement mode<br> + </span></small><small><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#pw">-pw</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use </span></small><small><span style="font-family: monospace;">projector</span></small><small><span + style="font-family: monospace;"> white relative measurement mode</span></small><small><span + style="font-family: monospace;"></span></small><br> + <small><span style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#a">-a</a><span + style="font-family: monospace;"> + + + + + + + + + + + + + + + + Use ambient measurement mode (absolute results)<br> + <a href="#f">-f</a> + + + + + + + + + + + + + + + Use ambient flash measurement mode (absolute results)<br> + </span></small><font size="-1"><span style="font-family: + monospace;"> <a href="#y">-y X</a> + + + + + + + + + + + + + + + + Display type - instrument specific list to choose from.</span></font><br> + <small><span style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="spotread.html#I">-I illum</a><span + style="font-family: monospace;"> + Set simulated instrument illumination + using FWA (def -i illum):</span><br style="font-family: + monospace;"> + <span style="font-family: monospace;"> + + + + + + +M0, + + M1, M2, A, D50 (def.), D50M2, D65, F5, F8, F10 or file.sp</span></small><br + style="font-family: monospace;"> + <small><span style="font-family: monospace;"></span><span + style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#i">-i illum</a><span + style="font-family: monospace;"> + Choose illuminant for computation of + CIE XYZ from spectral data & FWA:</span><br + style="font-family: monospace;"> + <span style="font-family: monospace;"> + + + + + + +A, +D50 +(def.), + + + + + + + + + + + + + + + D50M2, D65, F5, F8, F10 or file.sp</span><br style="font-family: + monospace;"> + <span style="font-family: monospace;"> </span><a style=" + font-family: monospace;" href="#Q">-Q observ</a><span + style="font-family: monospace;"> + Choose CIE Observer for + spectral data or CCSS instrument:</span><br style="font-family: + monospace;"> + <span style="font-family: monospace;"> + + + + + + + + + + + + + + + </span></small><small><span + style="font-family: monospace;">1931_2 </span></small><small><span + style="font-family: monospace;"> (def.)</span></small><small><span + style="font-family: monospace;">, 1964_10, S&B 1955_2, shaw, + J&V 1978_2</span></small><small><span style="font-family: + monospace;"></span></small><font size="-1"><span + style="font-family: monospace;"><br> + <a href="#F">-F filter</a> + + + + + + + + + + + + + + + Set filter configuration:<br> + + n + + + + + + + + + + + + + + + None<br> + + p + + + + + + + + + + + + + + + Polarising filter<br> + + 6 + + + + + + + + + + + + + + + D65<br> + + u + + + + + + + + + + + + + + + U.V. Cut<br> + <a href="#E">-E extrafilterfile</a> + Apply extra filter compensation file<br> + </span></font><font size="-1"><span style="font-family: + monospace;"> <a href="#x">-x</a> + + + + + + + + + + + + + + + + Display Yxy instead of Lab<br> + </span></font><font size="-1"><span style="font-family: + monospace;"> <a href="#h">-h</a> + + + + + + + + + + + + + + + + Display LCh instead of Lab</span></font><br> + <font size="-1"><span style="font-family: monospace;"> <a + href="#V">-V</a> + + + + + + + + + + + + + + + + Show running average and std. devation from ref.</span></font><br> + <font size="-1"><span style="font-family: monospace;"> <a + href="#T">-T</a> + + + + + + + + + + + + + + + + Display correlated color temperatures and CRI<br> + </span></font><font size="-1"><span style="font-family: + monospace;"> <a href="#N">-N</a> + + + + + + + + + + + + + + + Disable initial calibration of instrument if possible</span></font><br> + <font size="-1"><span style="font-family: monospace;"> </span><a + style="font-family: monospace;" href="#H">-H</a><span + style="font-family: monospace;"> + + Use high resolution spectrum mode + (if available)<br> + </span></font><font size="-1"><span style="font-family: + monospace;"><a href="#X1">-X file.ccmx</a> + + + + + + + + + + + + + + + Apply Colorimeter Correction Matrix</span></font><br> + <span style="font-family: monospace;"> <a href="#X2">-X + file.ccss</a> +Use +Colorimeter +Calibration +Spectral +Samples + + + + + + + + + + + + + + + for calibration</span><br> + <font size="-1"><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#Yrn">-<font size="-1">Y</font> + r|n</a><span style="font-family: monospace;"> + + + + + + + + Override refresh, non-refresh display + mode</span></font><br> + <font size="-1"><span style="font-family: monospace;"> </span><a + style=" font-family: monospace;" href="#YA">-<font size="-1">Y</font>A</a><span + style="font-family: monospace;"> + + Use non-adaptive integration time mode + (if available).</span></font><br> + <font size="-1"><span style="font-family: monospace;"> <a + href="#W">-W n|h|x</a> +Override +serial +port +flow +control: +n += +none, + + + + + + + + + + + + + + + h = HW, x = Xon/Xoff</span></font><br> + <small><span style="font-family: monospace;"> </span><a style=" + font-family: monospace;" href="#D">-D [level]</a><span + style="font-family: monospace;"> + + Print debug diagnostics to stderr</span></small><br> + <font size="-1"><span style="font-family: monospace;"> <a + href="#log"><span style="font-style: italic;">logfile</span></a> + + + + + + + + + + + + + + + Optional file to save reading results<br style="font-family: + monospace;"> + </span></font><small><span style="font-family: monospace;"></span><span + style="font-family: monospace;"></span></small><br> + <h3>Usage Details and Discussion</h3> + <b>spotread</b> operates in a similar fashion to <a + href="chartread.html"> chartread</a>, but allows the reading of a + succession of single color values. This can be useful in diagnosing + issues with profile creation and operation.<br> + <br> + <a name="v"></a>The <b>-v</b> flag causes extra information to be + printed out during chartread operation.<br> + <br> + <a name="s"></a>The <b>-s</b> flag enables the printing out + spectral reflectance/transmittance values, if the instrument + supports this.<br> + <br> + <a name="S"></a>The <b>-S</b> flag enables the plotting of the + spectral reflectance/transmittance values, if the instrument + supports this. If a reference is taken, this will be plotted in red. + You must strike a key in the plot window to continue with another + measurement.<br> + <br> + <a name="c"></a> The instrument is assumed to communicate through a + USB or serial communication port, and the port can be selected with + the <b>-c</b> option, if the instrument is not connected to the + first port. If you invoke <span style="font-weight: bold;">spotread</span> + so as to display the usage information (i.e. "spotread -?" or + "spotread --"), then the discovered USB and serial ports will be + listed. On UNIX/Linux, a list of all possible serial ports are + shown, but not all of them may actually be present on your system.<br> + <br> + <a name="t"></a>If using an Xrite DTP41T or SpectroScanT, and + printing onto transparent or back lit media, use the <b>-t</b> flag + to operate the instrument in transparency mode. If using the + Spectroscan, this triggers a fake transparency mode, that uses a + separate backlight (such as a light box). The instrument will + be used to calibrate the level of backlight, and use this to compute + the transparency of the test chart samples. Note that for good + transparency values, the backlight level needs to be neither too + bright not too dark, should ideally be incandescent rather than + fluorescent (since fluorescent lights often have big dips in their + spectrum), and ideally should be of uniform brightness over the + measurement area.<br> + <br> + <a name="e"></a>The <span style="font-weight: bold;">-e</span> flag + allows measuring in emission mode (e.g. displays or illuminants) + using instruments that support this mode. An adaptive integration + time will be used in devices that support it by default (see the <a + href="#ZA">-ZA</a> flag). Values returned are absolute.<br> + <br> + <a name="eb"></a>The <span style="font-weight: bold;">-eb</span> + flag allows measuring in emission mode using instruments that + support this mode, with the brightness reading being relative to the + white value read as the first reading. While the brightness values + are then relative to the white, the readings are otherwise absolute. + This corresponds to the raw ICC absolute readings created by <a + href="dispread.html">spotread</a>.<br> + <br> + <a name="ew"></a>The <span style="font-weight: bold;">-ew</span> + flag allows measuring in emissive mode using instruments that + support this mode, with the reading being relative to the white + value read as the first reading.<br> + <br> + <a name="p"></a>The <span style="font-weight: bold;">-p</span> flag + allows measuring in telephoto mode, using instruments that support + this mode, e.g. the ColorMunki. Values returned are absolute.<br> + Note that you would use normal emissive mode to measure + projectors using instruments without a specific telephoto mode.<br> + <br> + <a name="pb"></a>The <span style="font-weight: bold;">-pb</span> + flag allows measuring in telephoto mode using instruments that + support this mode, with the brightness reading being relative to the + white value read as the first reading. While the brightness values + are then relative to the white, the readings are otherwise absolute. + This corresponds to the raw ICC absolute readings created by <a + href="dispread.html">spotread</a>.<br> + <br> + <a name="pw"></a>The <span style="font-weight: bold;">-pw</span> + flag allows measuring in telephoto mode using instruments that + support this mode, with the reading being relative to the white + value read as the first reading.<br> + <br> + <a name="a"></a>The <span style="font-weight: bold;">-a</span> flag + allows measuring in ambient illumination mode using instruments that + support this mode (i.e. Eye-One Display 2). Values returned are + absolute, and include the various color temperatures and Color + Rendering Index (see <span style="font-weight: bold;">-T</span>). + If the instrument does not support ambient mode, emissive mode will + be used instead. An adaptive integration time will be used in + devices that support it. <br> + <br> + <a name="f"></a>The <span style="font-weight: bold;">-f</span> flag + allows measuring a flash with those instruments that support + scanning emissive measurements. The instrument needs to be triggered + by holding down its button, triggering the flash, then releasing the + button, similar to how a reflective strip is read.<br> + <br> + <a name="y"></a> The <span style="font-weight: bold;">-y</span> + flag allows setting the Display Type. The selection typically + determines two aspects of of the instrument operation: <span + style="font-weight: bold;">1)</span> It may set the measuring mode + to suite <a + href="http://en.wikipedia.org/wiki/Comparison_of_display_technology"><span + style="font-weight: bold;">refresh</span> or <span + style="font-weight: bold;">non-refresh</span> displays</a>. + Typically only LCD (Liquid Crystal) displays have a non-refresh + nature. <span style="font-weight: bold;">2)</span> It may select an + instrument calibration matrix suitable for a particular display + type. The selections available depends on the type and model of + instrument, and a list of the options for the discovered instruments + will be shown in the <a href="ArgyllDoc.html#CmdLine">usage</a> + information. For more details on what particular instruments support + and how this works, see <a href="instruments.html">Operation of + particular instruments</a>. <b>3)</b> Any installed CCSS files + (if applicable), or CCMX files. These files are typically created + using <a href="file:///D:/src/argyll/doc/ccxxmake.html">ccxxmake</a>, + and installed using <a + href="file:///D:/src/argyll/doc/oeminst.html">oeminst</a>. The + default and Base Calibration types will be indicated in the usage.<br> + <br> + <a name="I"></a>The <b>-I</b> parameter allows specifying a + standard or custom illumination spectrum to be used as the similated + instrument illuminant when FWA compensation is used during + measurement, overriding the default <b>D50</b> or CIE computation + illuminant used for FWA (see <b>-i</b> below<b>). </b>See <a + href="colprof.html#f">colprof -f</a> for a fuller explanation. <br> + <br> + <a name="i"></a>The <b>-i</b> parameter allows specifying a + standard or custom illumination spectrum applied to <span + style="text-decoration: underline;">reflective</span> or <u>transmissive</u> + spectral data to compute CIE tristimulus values. <b>A</b>, <b>D50</b>, + <b>D50M2, D65</b>, <b>F5</b>, <b>F8</b>, <b>F10</b> are a + selection of standard illuminant spectrums, with <b>D50</b> being + the default. If a filename is specified instead, it will be assumed + to be an Argyll specific <a href="File_Formats.html#.sp">.sp</a> + spectrum file. If FWA compensation is used during measurement, this + illuminant will be used by default as the simulated instrument + illuminant.<br> + <br> + <a name="Q"></a> The <b>-Q</b> flag allows specifying a tristimulus + observer, and is used to compute PCS (Profile Connection Space) + tristimulus values. This is possible for a spectral instrument, or a + colorimeter that has CCSS capability. The following choices are + available:<br> + <b> 1931_2</b> selects the standard CIE 1931 2 degree + observer. The default.<br> + <b>1964_10</b> selects the standard CIE 1964 10 degree + observer.<br> + <b>1955_2</b> selects the Stiles and Birch 1955 2 degree + observer<br> + <b>1978_2 </b>selects the Judd and Voss 1978 2 degree + observer<br> + <b>shaw</b> selects the Shaw and Fairchild 1997 2 degree + observer<br> + <br> + <a name="F"></a>The <b>-F</b> options allows configuring the + instrument to have a particular filter fitted to it. Some + instruments (i.e. the Gretag Spectrolino) allow the fitting of + various filters, such as a polarizing filter, D65 illuminant + simulation, or Ultra Violet Cut filter, and this option allows the + instrument to be configured appropriately.<br> + <br> + <a name="E"></a>The <b>-E</b> option allows the setting of an extra + filter compensation file, that allows for the filtration of the + spectral readings through a medium of some kind, when in emission + mode. This is useful in allowing for such things as telescopic + adapters that use a glass of acrylic lens in the optical path. [<span + style="font-weight: bold;">Note</span> that this is currently only + supported by the Spectrolino driver.]<br> + <br> + <a name="x"></a>The <b>-x</b> option causes the reading to be + displayed as XYZ and Yxy values, rather than the default XYZ and + L*a*b*<br> + <br> + <a name="h"></a>The <b>-h</b> option causes the reading to be + displayed as XYZ and LCh values, rather than the default XYZ and + L*a*b*<br> + <br> + <a name="V"></a>The <b>-V</b> enables average and standard + deviation statistics on the XYZ and L*a*b* values. This start and is + reset whenever a reference is taken ('r' key). A side effect of this + option is to disable the clamping of XYZ and L*a*b* value to + positive, so that a valid average of black can be obtained.This is + useful in quantifying repeatability.<br> + <br> + <a name="T"></a>The <b>-T</b> option causes various color + temperatures to be displayed, plus the Color Rendering Index. Three + color temperatures will be shown. The first is the classic + Correlated Color Temperature, which is the black body (Plankian) + color closest to the measured color in the CIE 1960 UCS color space. + The second is the black body (Plankian) color that has a minimum + CIEDE2000 error to the measured color. The last is the daylight + color that has a minimum CIEDE2000 error to the measured color. The + delta E between the closest temperature and the measured color is + also shown for each. The Color Rendering Index (CRI Ra) is also + computed if the instrument is capable of spectral measurement. If + the notation <span style="font-weight: bold;">(Invalid)</span> is + displayed after the CRI, then this means that the the spectrum white + point is to far from the black body and Daylight locus to be + meaningful.<br> + <br> + <a name="N"></a> <span style="font-weight: bold;">-N</span> Any + instrument that requires regular calibration will ask for + calibration on initial start-up. Sometimes this can be awkward if + the instrument is being mounted in some sort of measuring jig, or + annoying if several sets of readings are being taken in quick + succession. The -<span style="font-weight: bold;">N</span> + suppresses this initial calibration if a valid and not timed out + previous calibration is recorded in the instrument or on the host + computer. It is advisable to only use this option on the second and + subsequent measurements in a single session.<br> + <br> + <a name="H"></a> The -<span style="font-weight: bold;">H</span> + option turns on high resolution spectral mode, if the instrument + supports it. See <a href="instruments.html">Operation of particular + instruments</a> for more details.<br> + <br> + <a name="X1"></a> The -<span style="font-weight: bold;">X <span + style="font-style: italic;">file.ccmx</span></span> option reads + a <a href="File_Formats.html#.ccmx">Colorimeter Correction Matrix</a> + from the given file, and applies it to the colorimeter instruments + readings. This can improve a colorimeters accuracy for a particular + type of display. A list of contributed <span style="font-weight: + bold;">ccmx</span> files is <a href="ccmxs.html">here</a>.<br> + <br> + <a name="X2"></a> The -<span style="font-weight: bold;">X <span + style="font-style: italic;">file.ccss</span></span> option reads + a <a href="File_Formats.html#.ccss">Colorimeter Calibration + Spectral Sample</a> from the given file, and uses it to set the + colorimeter instruments calibration. This will only work with + colorimeters that rely on sensor spectral sensitivity calibration + information (ie. the X-Rite <span style="font-weight: bold;">i1d3</span>, + or the DataColor <span style="font-weight: bold;">Spyder4</span>).This +can +improve +a + + + + + + + + + + + + + + colorimeters accuracy for a particular type of display.<br> + <br> + <a name="Yrn"></a> The -<span style="font-weight: bold;">Y r </span>and + + + + + + + <b>-Y n</b> options overrides the refresh display mode set by the <a + href="#y">-y display type selection</a>, with <b>-Y</b><span + style="font-weight: bold;"> r</span> forcing refresh display mode, + and <b>-Y n</b> forcing a non-refresh display mode. Not all + instruments support a display measurement refresh mode, or the + ability to override the mode set by the display type selection.<br> + <br> + <a name="YA"></a> The -<span style="font-weight: bold;">Y A</span> + option uses a non-adaptive integration time emission measurement + mode, if the instrument supports it, such as the Eye-One Pro or + ColorMunki. By default an adaptive integration time measurement mode + will be used for emission measurements, but some instruments support + a fixed integration time mode that can be used with display devices. + This may give increased consistency and faster measurement times, + but may also give less accurate low level readings.<br> + <br> + <a name="W"></a>The <b>-W</b> <span style="font-weight: bold;">n|h|x</span> + parameter overrides the default serial communications flow control + setting. The value <span style="font-weight: bold;">n</span> turns + all flow control off, <span style="font-weight: bold;">h</span> + sets hardware handshaking, and <span style="font-weight: bold;">x</span> + sets Xon/Xoff handshaking. This commend may be useful in workaround + serial communications issues with some systems and cables. <br> + <br> + <a name="D"></a>The <b>-D</b> flag causes communications and other + instrument diagnostics to be printed to stdout. A level can be set + between 1 .. 9, that may give progressively more verbose + information, depending on the instrument. This can be useful in + tracking down why an instrument can't connect.<br> + <br> + <a name="log"></a>The <span style="font-weight: bold; font-style: + italic;">logfile</span> is an optional file that can be specified + to capture each reading taken. There will be column headers printed + to the first row, and then each reading will be on a separate line + with tab separators.<br> + <br> + All instruments will be used in a spot mode. For the SpectroScan + instrument, the samples can be placed on the table, and the + measuring head positioned before taking a measurement. Note that the + default mode (reflectance measurement) may not be supported by the + instrument, so a mode it does support will be selected + automatically. Override this on the command line if desired. Note + that the DTP51, DTP92, DTP94 and Eye-One Display are colorimeters, + and cannot read spectral information, and that the DTP92 can only + read CRT type displays.<br> + <br> + <hr style="width: 100%; height: 2px;"><br> + Once <b>spotread</b> has established communications with the + instrument, it awaits a command from the user, indicated by the user + hitting a key or activating the instrument switch. XYZ values are in + the range 0 .. 100 for reflective or transmissive readings, and + absolute cd/m^2 for display, emissive and ambient readings.<br> + <br> + The L*a*b* values are computed relative to a D50 100 scale white + point. (Note that using display white relative mode makes the L*a*b + relative to the display white point.)<br> + <br> + If Fluorescent Whiter Additive (FWA) compensated readings are to be + made, then this needs to be enabled with the correct command line + switches, and then setup for each paper white background color, to + establish an FWA reference. There is one FWA reference locations + available for each alphabetic character not used for a special + function (ie. not <span style="font-weight: bold;">H, K, N, Q, R, + S, F)</span>, keyed to the capital letters <b>A-</b><b>Z</b>, + allowing FWA corrected comparisons between many different media.<br> + <br> + Once a particular reference location is initialized with the FWA + paper color, subsequent readings triggered by using the + corresponding lower case letter <span style="font-weight: bold;">a-z</span> + will use FWA compensation for that keyed location. Note that + readings that are triggered some other way (ie. using a non + alphabetic key, or using the instrument switch) will not be FWA + corrected readings.<br> + <br> + If a non-FWA readings is to be performed, then a reading for a + location that has not been initialised for paper white should be + used, or a non alphabetic key (such as space or return) or + instrument switch trigger should be used.<br> + <br> + If the instrument supports a high resolution spectral mode, then it + can be toggled on and off using the <span style="font-weight: + bold;">h</span> key.<br> + <br> + If the instrument supports stored readings (ie. DTP20), then these + can be ignored using the <span style="font-weight: bold;">n</span> + key.<br> + <br> + The previous reading can be stored as a reference, and delta E's + computed for each reading, using the <b>r</b> key.<br> + <br> + A previous spectral reading can be saved in a spectrum CGATS file + (spectrum.sp) using the <span style="font-weight: bold;">s</span> + key, making this a convenient way of creating a custom illuminant + spectrum.<br> + <br> + A calibration can be initiated using the <span style="font-weight: + bold;">k</span> key.<br> + <br> + For instruments that support it and are in a refresh display mode, + the calibrated refresh rate can be read back using the <b>f</b> + key.<br> + <br> + For instruments that support it and are in an emissive measurement + mode, a display refresh rate measurement can be made by using the <b>F</b> + key.<br> + <br> + <br> + <br> + <br> + <br> + <br> + <br> + <br> + <br> + <br> + </body> +</html> |