http://code.msdn.microsoft.com/ReadingJPEGSize/Project/ProjectRss.aspxThe common and easy way of reading the dimensions of a JPEG file is to new-up an Image object and then read its Height and Width properties. While this is easy and does work, it&#39;s expensive. It rea...http://code.msdn.microsoft.com/ReadingJPEGSize/WorkItem/View.aspx?WorkItemId=1Fixed two bugs that prevented the dimensions from being properly read from certain JPEG images. Also cleaned up the endian swapper.<br />mroachMon, 08 Dec 2008 16:20:41 GMTEDITED ISSUE: Fixed two bugs where certain image types would not be read 20081208Phttp://code.msdn.microsoft.com/ReadingJPEGSize/WorkItem/View.aspx?WorkItemId=1Fixed two bugs that prevented the dimensions from being properly read from certain JPEG images. Also cleaned up the endian swapper.<br />mroachMon, 08 Dec 2008 16:20:29 GMTEDITED ISSUE: Fixed two bugs where certain image types would not be read 20081208Phttp://code.msdn.microsoft.com/ReadingJPEGSize/WorkItem/View.aspx?WorkItemId=1Title<br />mroachSat, 06 Dec 2008 03:43:40 GMTCREATED ISSUE: Fixed two bugs where certain image types would not be read 20081206Ahttp://code.msdn.microsoft.com/ReadingJPEGSize/Release/ProjectReleases.aspx?ReleaseId=1897Sat, 06 Dec 2008 03:42:48 GMTUPDATED RELEASE: v1.2 (Dec 05, 2008) 20081206Ahttp://code.msdn.microsoft.com/ReadingJPEGSize/Release/ProjectReleases.aspx?ReleaseId=1897Sat, 06 Dec 2008 03:14:15 GMTUPDATED RELEASE: v1.1 (Dec 05, 2008) 20081206Ahttp://code.msdn.microsoft.com/ReadingJPEGSize/Release/ProjectReleases.aspx?ReleaseId=1897Sat, 06 Dec 2008 03:14:09 GMTUPDATED RELEASE: v1.0 (Dec 05, 2008) 20081206Ahttp://code.msdn.microsoft.com/ReadingJPEGSize/Wiki/View.aspx?title=Home&version=6<div class="wikidoc"> <b>Resource Page Description</b><br />The common and easy way of reading the dimensions of a JPEG file is to new-up an Image object and then read its Height and Width properties. While this is easy and does work, it&#39;s expensive. It reads the entire image into memory just to get two small pieces of information that are stored in file. This function will get the JPEG image&#39;s dimensions by reading in the first few bytes of the file where the dimensions are stored. It&#39;s much faster and cheaper than newing-up and Image object.<br /><br />I adapted some Java and Perl examples I found to work in C&#35;. The only non-straight-forward thing here is reading bytes in big endian. <br /> <br /><b>Usage Example</b><br /> <br /><pre> Size z = ImageHelpers.JpegHelper.GetJpegImageSize(@&quot;D:\BMW_M3_E90.jpg&quot;); Console.WriteLine(&quot;{0}x{1}&quot;, z.Width, z.Height); </pre> <br /><span class="codeInline">400x320</span><br /> <br />Nice an easy.<br /> </div>mroachFri, 05 Dec 2008 17:04:32 GMTUPDATED WIKI: Home 20081205Phttp://code.msdn.microsoft.com/ReadingJPEGSize/Wiki/View.aspx?title=Home&version=5<div class="wikidoc"> <b>Resource Page Description</b><br />The common and easy way of reading the dimensions of a JPEG file is to new-up an Image object and then read its Height and Width properties. While this is easy and does work, it&#39;s expensive. It reads the entire image into memory just to get two small pieces of information that are stored in file. This function will get the JPEG image&#39;s dimensions by reading in the first few bytes of the file where the dimensions are stored. It&#39;s much faster and cheaper than newing-up and Image object.<br /><br />I adapted some Java and Perl examples I found to work in C&#35;. The only non-straight-forward thing here is reading bytes in big endian. <br /> <br /><b>Usage Example</b><br /><pre> Size z = ImageHelpers.JpegHelper.GetJpegImageSize(@&quot;D:\BMW_M3_E90.jpg&quot;); Console.WriteLine(&quot;{0}x{1}&quot;, z.Width, z.Height); </pre> <br /><span class="codeInline">400x320</span><br /> <br />Nice an easy.<br /> </div>mroachFri, 05 Dec 2008 17:04:18 GMTUPDATED WIKI: Home 20081205Phttp://code.msdn.microsoft.com/ReadingJPEGSize/Wiki/View.aspx?title=Home&version=4<div class="wikidoc"> <b>Resource Page Description</b><br />The common and easy way of reading the dimensions of a JPEG file is to new-up an Image object and then read its Height and Width properties. While this is easy and does work, it&#39;s expensive. It reads the entire image into memory just to get two small pieces of information that are stored in file. This function will get the JPEG image&#39;s dimensions by reading in the first few bytes of the file where the dimensions are stored. It&#39;s much faster and cheaper than newing-up and Image object.<br /><br />I adapted some Java and Perl examples I found to work in C&#35;. The only non-straight-forward thing here is reading bytes in big endian. <br /> <br /><b>Usage Example</b><br /><pre> Size z = ImageHelpers.JpegHelper.GetJpegImageSize(@&quot;D:\BMW_M3_E90.jpg&quot;); Console.WriteLine(&quot;{0}x{1}&quot;, z.Width, z.Height); </pre> <br /><span class="codeInline">&gt;&gt; 400x320</span><br /> <br />Nice an easy.<br /> </div>mroachFri, 05 Dec 2008 17:04:00 GMTUPDATED WIKI: Home 20081205Phttp://code.msdn.microsoft.com/ReadingJPEGSize/Wiki/View.aspx?title=Home&version=3<div class="wikidoc"> <b>Resource Page Description</b><br />The common and easy way of reading the dimensions of a JPEG file is to new-up an Image object and then read its Height and Width properties. While this is easy and does work, it&#39;s expensive. It reads the entire image into memory just to get two small pieces of information that are stored in file. This function will get the JPEG image&#39;s dimensions by reading in the first few bytes of the file where the dimensions are stored. It&#39;s much faster and cheaper than newing-up and Image object.<br /><br />I adapted some Java and Perl examples I found to work in C&#35;. The only non-straight-forward thing here is reading bytes in big endian. <br /> <br /><b>Usage Example</b><br /> <br /><pre> Size z = ImageHelpers.JpegHelper.GetJpegImageSize(@&quot;D:\bmw m3 e92 sjop arctic.jpg&quot;); Console.WriteLine(&quot;{0}x{1}&quot;, z.Width, z.Height); </pre> <br />Nice an easy.<br /> </div>mroachFri, 05 Dec 2008 17:03:19 GMTUPDATED WIKI: Home 20081205Phttp://code.msdn.microsoft.com/ReadingJPEGSize/Wiki/View.aspx?title=Home&version=2<div class="wikidoc"> <b>Resource Page Description</b><br />The common and easy way of reading the dimensions of a JPEG file is to new-up an Image object and then read its Height and Width properties. While this is easy and does work, it&#39;s expensive. It reads the entire image into memory just to get two small pieces of information that are stored in file. This function will get the JPEG image&#39;s dimensions by reading in the first few bytes of the file where the dimensions are stored. It&#39;s much faster and cheaper than newing-up and Image object.<br /><br />I adapted some Java and Perl examples I found to work in C&#35;. The only non-straight-forward thing here is reading bytes in big endian. <br /> <br /><b>Usage Example</b><br /><pre> Size z = ImageHelpers.JpegHelper.GetJpegImageSize(@&quot;D:\bmw m3 e92 sjop arctic.jpg&quot;); Console.WriteLine(&quot;{0}x{1}&quot;, z.Width, z.Height); </pre> <br />Nice an easy.<br /> </div>mroachFri, 05 Dec 2008 17:03:08 GMTUPDATED WIKI: Home 20081205Phttp://code.msdn.microsoft.com/ReadingJPEGSize/Release/ProjectReleases.aspx?ReleaseId=1897Fri, 05 Dec 2008 17:00:36 GMTUPDATED RELEASE: v1.0 (Dec 05, 2008) 20081205Phttp://code.msdn.microsoft.com/ReadingJPEGSize/Release/ProjectReleases.aspx?ReleaseId=1897Fri, 05 Dec 2008 16:48:38 GMTCREATED RELEASE: v1.0 (Dec 05, 2008) 20081205P