home *** CD-ROM | disk | FTP | other *** search
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>4.3.  Make JPEGs Smaller</title> <link rel="stylesheet" href="gimp-help-plain.css" type="text/css" /> <link rel="stylesheet" href="gimp-help-screen.css" type="text/css" /> <link rel="stylesheet" href="gimp-help-custom.css" type="text/css" /> <link rel="alternate stylesheet" href="gimp22.css" type="text/css" title="gimp22" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="GNU Image Manipulation Program" /> <link rel="up" href="gimp-tutorial-quickies.html" title="4.  GIMPLite Quickies" /> <link rel="prev" href="gimp-tutorial-quickie-scale.html" title="4.2.  Change the Size of an Image (Scale)" /> <link rel="next" href="gimp-tutorial-quickie-crop.html" title="4.4.  Crop An Image" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">4.3.  <span lang="en" xml:lang="en">Make JPEGs Smaller</span> </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="gimp-tutorial-quickie-scale.html"><img src="../images/prev.png" alt="Prev" /></a> </td> <th width="60%" align="center">4.  <span lang="en" xml:lang="en">GIMPLite Quickies</span> </th> <td width="20%" align="right"> <a accesskey="n" href="gimp-tutorial-quickie-crop.html"><img src="../images/next.png" alt="Next" /></a></td> </tr> </table> <hr /> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="gimp-tutorial-quickie-jpeg"></a>4.3.  <span lang="en" xml:lang="en">Make JPEGs Smaller</span> </h3> </div> </div> </div> <a id="id2585258" class="indexterm"></a> <a id="id2585266" class="indexterm"></a> <div class="figure"> <a id="id2585278"></a> <p class="title"> <b>Figure 3.16.  <span lang="en" xml:lang="en">Example Image for JPEG Saving</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-example.jpg" alt="Example Image for JPEG Saving" /> </div> </div> </div> <br class="figure-break" /> <p> You can make your jpegs smaller without changing the pixel width of the image. Actually you can change the weight of the image a lot. I used an(other) image from APOD <a class="xref" href="bibliography.html#bibliography-online-apod04" title="Astronomy Picture of the Day - Saturn: Lord of the Rings (2002 February 15)">[<abbr class="abbrev">APOD04</abbr>]</a>. The original image is huge (3000 pixels wide) so I also made a smaller (pixel width) image available. To prepare this image for the web, you should first reduce the image to a better width and height for web viewing as described in the <a class="xref" href="gimp-tutorial-quickie-scale.html" title="4.2.  Change the Size of an Image (Scale)">Section 4.2, “ <span lang="en" xml:lang="en">Change the Size of an Image (Scale)</span> ”</a>. Right click on the properly scaled image and follow the menus <span class="guimenu">File</span> → <span class="guimenuitem">Save As...</span> at the image window. The Save Dialog will pop up. </p> <p> I generally type the filename I want into the text box, but the Extension drop menu can tell you the available file formats (depending on the libraries you have installed and the conditions of the image you are trying to save). If The GIMP complains right now, or if “<span class="quote">JPEG</span>” is grayed out in the Extensions menu you should just cancel out of everything and step through the <a class="xref" href="gimp-tutorial-quickie-change-mode.html" title="4.6.  Change the Mode">Section 4.6, “ <span lang="en" xml:lang="en">Change the Mode</span> ”</a>. </p> <p> In the JPEG Save Dialog, you can opt for The GIMP defaults which reduce the size quite a bit, without hurting the visual quality in a way that I can detect. This would be the safest and quickest thing to do. </p> <div class="figure"> <a id="id2585377"></a> <p class="title"> <b>Figure 3.17.  <span lang="en" xml:lang="en">Dialog for Image Saving as JPEG</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-dialog.png" alt="Dialog for Image Saving as JPEG" /> </div> </div> </div> <br class="figure-break" /> <p> If you would like to make it smaller still, make sure that the “<span class="quote">Preview</span>” toggle is on and then watch the image area and change the compression level by moving the “<span class="quote">Quality</span>” slider down. You can see the quality of the image changing, especially towards the leftmost end of the slider. Above is a screenshot of me doing this very thing. As you can see, very small is also very bad. I have a screenshot of me setting the Quality slider to a more acceptable level below. </p> <div class="figure"> <a id="id2585426"></a> <p class="title"> <b>Figure 3.18.  <span lang="en" xml:lang="en">Dialog for Image Saving as JPEG</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-dialog2.png" alt="Dialog for Image Saving as JPEG" /> </div> </div> </div> <br class="figure-break" /> <p> I have not been showing the actual jpegs I created so that we could end this quickie with a race. </p> <div class="figure"> <a id="id2585463"></a> <p class="title"> <b>Figure 3.19.  <span lang="en" xml:lang="en">Example for High JPEG Compression</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-006.jpg" alt="Example for High JPEG Compression" /> <div class="caption"> <p>Quality: 6; Size: 1361 Bytes</p> </div> </div> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-042.jpg" alt="Example for High JPEG Compression" /> <div class="caption"> <p>Quality: 42; Size: 3549 Bytes</p> </div> </div> </div> </div> <br class="figure-break" /> <div class="figure"> <a id="id2585522"></a> <p class="title"> <b>Figure 3.20.  <span lang="en" xml:lang="en">Example for Moderate JPEG Compression</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-085.jpg" alt="Example for Moderate JPEG Compression" /> <div class="caption"> <p> Quality: 85 (GIMPs default); Size: 6837 Bytes </p> </div> </div> <div class="mediaobject"> <img src="../images/tutorials/quickie-jpeg-100.jpg" alt="Example for Moderate JPEG Compression" /> <div class="caption"> <p>Quality: 100; Size: 20,971 Bytes</p> </div> </div> </div> </div> <br class="figure-break" /> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="gimp-tutorial-quickie-scale.html"><img src="../images/prev.png" alt="Prev" /></a> </td> <td width="20%" align="center"> <a accesskey="u" href="gimp-tutorial-quickies.html"> <img src="../images/up.png" alt="Up" /> </a> </td> <td width="40%" align="right"> <a accesskey="n" href="gimp-tutorial-quickie-crop.html"><img src="../images/next.png" alt="Next" /></a></td> </tr> <tr> <td width="40%" align="left" valign="top"><a accesskey="p" href="gimp-tutorial-quickie-scale.html">4.2.  <span lang="en" xml:lang="en">Change the Size of an Image (Scale)</span> </a> </td> <td width="20%" align="center"> <a accesskey="h" href="index.html"> <img src="../images/home.png" alt="Home" /> </a> </td> <td width="40%" align="right" valign="top"> <a accesskey="n" href="gimp-tutorial-quickie-crop.html">4.4.  <span lang="en" xml:lang="en">Crop An Image</span> </a></td> </tr> </table> </div> </body> </html> 
