71 lines
4.2 KiB
HTML
71 lines
4.2 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<title>Troubleshoot the image print transform</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="rzalutroubleipt"></a>
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<h3 id="rzalutroubleipt">Troubleshoot the image print transform</h3>
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<p>The following are answers to questions that might arise when you use the
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image print transform function or the Convert Image API: </p>
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<ul>
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<li>Why does it take longer to process PostScript data streams?
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<p>One reason
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why PostScript data streams take a long time to process is the amount of information
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that needs to be transformed. Color documents especially require large amounts
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of memory and many data conversions, which means longer processing times.</p>
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<a name="wq267"></a>
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<div class="notetitle" id="wq267">Note:</div>
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<div class="notebody">If the photometricity of the converted data stream is
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not requested, it is assumed by default to be RGB, or color. However, if
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you know you do not want RGB, or the input data stream is not color, specify
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an image configuration object that only supports black and white output. This
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will greatly increase the throughput of the image print transform function,
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and speed up PostScript processing.</div></li>
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<li>Why is the converted data stream positioned incorrectly on or off the
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page? Why is it not centered?
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<p>The resolution specified in the image configuration
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object is probably not supported by the printer that the object is configured
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with. When this happens, an incorrect no print border is retrieved from the
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image configuration object and the data is consequently positioned incorrectly
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on the output page. The printer might also be set up to automatically add
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a no-print border, which will cause the output generated by the image print
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transform function to be shifted on the page. Verify that the correct image
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configuration object is being used with the printer, that the printer has
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been set up properly, and that the printer and has been physically calibrated.</p></li>
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<li>Why didn't the PostScript data stream generate a new data stream?
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<p>The PostScript data stream probably did not contain any printable data. To
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verify this, start the image print transform function and check the job log
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of the writer. Look for a message that indicates that no printable data was
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found. If no message exists, an error might have occurred while processing
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the file. Refer to the job log of the corresponding QIMGSERV job.</p></li>
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<li>Why is the printed image three times the original size when converted
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from color or gray scale to black and white?
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<p>When a color image or gray
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scale image is converted to black and white, a dithering process takes place.
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In this process, a single color or gray scale pixel is transformed into a
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3x3 matrix of pixels. Each pixel within this matrix will be either black
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or white, depending on the color being rendered.</p></li></ul>
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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