3b4f7c19eb
git-svn-id: https://subversion.xor.aps.anl.gov/synApps/areaDetector/trunk@8215 dc6c5ff5-0b8b-c028-a01f-ffb33f00fc8b
256 lines
9.2 KiB
HTML
Executable File
256 lines
9.2 KiB
HTML
Executable File
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>areaDetector Plugin NDPluginColorConvert</title>
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</head>
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<body>
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<div style="text-align: center">
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<h1>
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areaDetector Plugin NDPluginColorConvert</h1>
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<h2>
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January 19, 2009</h2>
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<h2>
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Mark Rivers</h2>
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<h2>
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University of Chicago</h2>
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</div>
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<h2>
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Contents</h2>
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<ul>
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<li><a href="#Overview">Overview</a></li>
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<li><a href="#Configuration">Configuration</a></li>
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<li><a href="#Screens">Screen shots</a></li>
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<li><a href="#Future">Future plans</a></li>
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</ul>
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<h2 id="Overview">
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Overview
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</h2>
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<p>
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This plugin is a tool for converting the color mode of NDArray data.
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</p>
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<p>
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NDPluginColorConvert inherits from NDPluginDriver. NDPluginColorConvert receives
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an input NDArray with one color mode and outputs another NDArray with a (potentially)
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different color mode. All other attributes of the array are preserved. The NDPluginStdArrays
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public interface is defined in NDPluginColorConvert.h as follows:</p>
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<pre>
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class NDPluginColorConvert : public NDPluginDriver {
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public:
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NDPluginColorConvert(const char *portName, int queueSize, int blockingCallbacks,
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const char *NDArrayPort, int NDArrayAddr,
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size_t maxMemory);
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/* These methods override the virtual methods in the base class */
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void processCallbacks(NDArray *pArray);
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asynStatus drvUserCreate(asynUser *pasynUser, const char *drvInfo,
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const char **pptypeName, size_t *psize);
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/* These methods are just for this class */
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template < typename epicstype > void convertColor(NDArray *pArray);
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};
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...
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}
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</pre>
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<p>
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NDPluginStdArrays defines the following parameters. It also implements all of the
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standard plugin parameters from <a href="pluginDoc.html#NDPluginDriver">NDPluginDriver</a>
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. The EPICS database NDColorConvert.template provides access to these parameters,
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listed in the following table.
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</p>
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<table border="1" cellpadding="2" cellspacing="2" style="text-align: left">
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<tbody>
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<tr>
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<td align="center" colspan="7,">
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<b>Parameter Definitions in NDPluginColorConvert.h and EPICS Record Definitions in
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NDColorConvert.template</b></td>
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</tr>
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<tr>
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<th>
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Enum name</th>
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<th>
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asyn interface</th>
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<th>
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Access</th>
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<th>
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Description</th>
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<th>
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drvUser string</th>
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<th>
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EPICS record name</th>
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<th>
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EPICS record type</th>
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</tr>
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<tr>
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<td>
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NDPluginColorConvertColorModeOut</td>
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<td>
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asynInt32</td>
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<td>
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r/w</td>
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<td>
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The output color mode.</td>
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<td>
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COLOR_MODE_OUT</td>
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<td>
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$(P)$(R)ColorModeOut
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<br />
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$(P)$(R)ColorModeOut_RBV
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</td>
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<td>
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mbbo
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<br />
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mbbi</td>
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</tr>
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</tbody>
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</table>
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<p>
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NDPluginColorConvert currently supports the following conversions:</p>
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<ul>
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<li>Bayer to RGB1, RGB2, or RGB3 </li>
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<li>RGB1 to RGB2 or RGB3</li>
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<li>RGB2 to RGB1 or RGB3</li>
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<li>RGB3 to RGB1 or RGB2</li>
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</ul>
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<p>
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If the input color mode and output color mode are not one of these supported conversion
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combinations then the output array is simply a copy of the input array and no conversion
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is performed.</p>
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<h2 id="Configuration">
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Configuration</h2>
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<p>
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The NDPluginColorConvert plugin is created with the following command, either from
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C/C++ or from the EPICS IOC shell.
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</p>
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<pre>drvNDColorConvertConfigure(const char *portName, int queueSize, int blockingCallbacks,
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const char *NDArrayPort, int NDArrayAddr, size_t maxMemory)
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</pre>
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<table border="1" cellpadding="2" cellspacing="2" style="text-align: left">
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<tr>
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<th>
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Argument</th>
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<th>
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Description</th>
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</tr>
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<tr>
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<td>
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<code>portName</code></td>
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<td>
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The name of the asyn port for this plugin.
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</td>
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</tr>
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<tr>
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<td>
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<code>queueSize</code></td>
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<td>
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The maximum number of NDArray objects that can be queued for processing. Passed
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to the NDPluginDriver base class constructor.
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</td>
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</tr>
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<tr>
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<td>
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<code>blockingCallbacks</code></td>
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<td>
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Flag controlling whether callbacks block. Passed to the NDPluginDriver base class
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constructor.
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</td>
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</tr>
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<tr>
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<td>
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<code>NDArrayPort</code></td>
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<td>
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The name of the asyn port of the driver that will provide the NDArray data. Passed
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to the NDPluginDriver base class constructor.
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</td>
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</tr>
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<tr>
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<td>
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<code>NDArrayAddr</code></td>
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<td>
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The asyn addr of the asyn port of the driver that will provide the NDArray data.
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Passed to the NDPluginDriver base class constructor.
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</td>
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</tr>
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<tr>
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<td>
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<code>maxMemory</code></td>
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<td>
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Maximum number of bytes of memory to be allocated from the NDArrayPool. Passed to
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the constructor for the NDPluginDriver base class. The NDStdArrays plugin allocates
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2 NDArray objects, so this should be at least twice the size of the largest NDArray
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to be used.</td>
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</tr>
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</table>
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<h2 id="Screens">
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Screen shots</h2>
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<p>
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The following is the MEDM screen that provides access to the parameters in NDPluginDriver.h
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and NDPluginStdArrays.h through records in NDPluginBase.template and NDStdArrays.template.
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This is the MEDM screen that is normally used to control the display of images via
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EPICS channel access.
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</p>
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<div style="text-align: center">
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<h3>
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NDStdArrays.adl</h3>
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<p>
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<img alt="NDStdArrays.png" src="NDStdArrays.png" /></p>
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</div>
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<h2 id="IDLClient">
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IDL Image Display Client</h2>
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<p>
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There is an IDL procedure called <a href="http://cars.uchicago.edu/software/idl/imaging_routines.html#epics_ad_display">
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epics_ad_display</a> that can be used to display 2-dimensional array data that
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the NDStdArrays plugin sends to EPICS. This IDL client is available as source code
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(which requires an IDL license), and also as a pre-built IDL .sav file that can
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be run for free under the IDL Virtual Machine. This IDL program can run on any machine
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that IDL runs on, and that has the ezcaIDL shareable library built for it. This
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includes Windows, Linux, Solaris, and Mac. <code>epics_ad_display</code> is included
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in the <a href="http://cars.uchicago.edu/software/IDL/imaging.html">CARS IDL imaging
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software.</a>
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</p>
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<p>
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The control window for <code>epics_ad_display</code> is shown below. It has a field
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to input the base name of the EPICS PVs with the image data. It also has fields
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to enable/display the IDL display update, to change the display mode, to autoscale
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the intensity, and to invert the image in the Y direction. If autoscale is set to
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No then manual scaling can be entered in the Min and Max fields. The number of frames
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per second actually being displayed by IDL is shown. There is a status window that
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shows whether the EPICS PVs are connected and the time the last was array received,
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updated once per second.
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</p>
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<div style="text-align: center">
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<h3>
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Main window for IDL epics_ad_display</h3>
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<p>
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<img alt="IDL_epics_ad_display.png" src="IDL_epics_ad_display.png" /></p>
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</div>
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<p>
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<code>epics_ad_display</code> can use the simple IDL routine <code>tv</code> to
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display the images. This is the fastest mode, and results in a non-scalable unadorned
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window.</p>
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<div style="text-align: center">
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<h3>
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IDL epics_ad_display using the IDL <code>tv</code> routine.</h3>
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<p>
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<img alt="IDL_epics_ad_display_tv.jpg" src="IDL_epics_ad_display_tv.jpg" /></p>
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</div>
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<p>
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<code>epics_ad_display</code> can also use the routine <a href="http://cars.uchicago.edu/software/IDL/imaging_routines.html#IMAGE_DISPLAY">
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image_display.pro</a> to display the images. This routine displays row and column
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profiles as the cursor is moved. It allows changing the color lookup tables, and
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zooming in (right mouse click) and out (left mouse click). The following is an example
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of <code>image_display</code> displaying an image from the simulation detector.</p>
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<div style="text-align: center">
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<h3>
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epics_ad_display using the image_display routine</h3>
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<p>
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<img alt="simDetector_image_display.png" src="simDetector_image_display.png" /></p>
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</div>
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<h2 id="Future">
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Future plans</h2>
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<p>
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Stephen Mudie at the Australian Synchrotron has written a very nice IDL client to
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display the EPICS images from the Flea Firewire cameras. This client should be converted
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to display the data from this areaDetector plugin.
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</p>
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</body>
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</html>
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