Joys - Multi Projector Widescreen - Screen Processing/title> </head> <body leftmargin="0" topmargin="0" rightmargin="0" bottommargin="0" marginwidth="0" marginheight="0" class="sitebg" id="drill2"> <table width="947" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#000000"> <tr> <td width="3" valign="top" bgcolor="#000000"> </td> <td width="941" align="center" valign="top">  <table width="941" border="0" cellspacing="0" cellpadding="0"> <tr> <td><a href="/home.shtml"><img src="/images/top_logo.gif" alt="homepage" width="213" height="84" border="0" align="right" /></a><img src="/images/top_header.gif" width="728" height="84" /></td> </tr> <tr> <td>  <table width="941" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="38" valign="middle"> <div id="nav" class="clearfix"> <ul><li><a href="/home.shtml" rel="self" id="current">HOME</a></li> <li><a href="/widescreen/" rel="self">WIDESCREEN</a><ul> <li><a href="/widescreen/multi_projector.shtml" rel="self">HD Multi Projector Widescreen</a></li> <li><a href="/widescreen/spyder_control.shtml">Spyder Screen Control</a></li> <li><a href="/widescreen/technical_consult.shtml" rel="self">Technical Consultancy</a></li> <li><a href="/widescreen/faq.shtml" rel="self">FAQs</a></li> </ul></li> <li><a href="/hd_projection/" rel="self">HD PROJECTION</a><ul> <li><a href="/hd_projection/digital_35_hd.shtml" rel="self">Digital 35 HD 18k</a></li> <li><a href="/hd_projection/christie_hd_12k.shtml" rel="self">Christie HD 12k</a></li> <li><a href="/hd_projection/christie_hd_8k.shtml" rel="self">Christie HD 8k</a></li> <li><a href="/hd_projection/hd_playback.shtml" rel="self">HD Playback</a></li> <li><a href="/hd_projection/hd_switching.shtml" rel="self">HD Switching</a></li> </ul></li> <li><a href="/media/" rel="self">MEDIA</a><ul> <li><a href="/media/3dlive.shtml" rel="self">3DLive</a></li> <li><a href="/media/wide_presentations.shtml" rel="self">Widescreen Presentation</a></li> <li><a href="/media/hd_backgrounds.shtml" rel="self">HD Backgrounds</a></li> <li><a href="/media/video_production.shtml" rel="self">Video Production</a></li> <li><a href="/media/off_shelf.shtml" rel="self">Off The Shelf</a></li> </ul></li> <li><a href="/gallery/" rel="self">GALLERY</a><ul> <li><a href="/gallery/case_study.shtml" rel="self">Case Studies</a></li> <li><a href="/gallery/photo_library.shtml" rel="self">Photo Library</a></li> <li><a href="/gallery/demo_video.shtml" rel="self">Demo Videos</a></li> <li><a href="/gallery/showreel.shtml" rel="self">Showreel</a></li> </ul></li> <li><a href="/contact/contact.shtml" rel="self">CONTACT US</a></li> </ul> </div> </td> </tr> </table>  </td> </tr> </table>   <script language="JavaScript"> showImage(); </script>   <B>Error processing SSI file</B><BR>   <table width="941" border="0" cellspacing="0" cellpadding="0" class=bodybg> <tr> <td> <table width="941" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="13"> </td> </tr> </table> <table width="941" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="639" valign="top"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tr> <td width="17"> </td> <td width="622" class="bodypannel"> <table width="600" border="0" cellspacing="0" cellpadding="0"> <tr> <td align="left"> <img src="../images/hd_banner_multi_project.jpg" width="596" height="83" vspace="10" border="0" /><br /><br /> <div class=heading>// SCREEN PROCESSING</div> <br /> To ensure a seamless widescreen image, quality projected images cannot be just 'butted' together due to slight variances in image brightness, colour etc. Projected images are overlapped slightly - usually about 5-10% of the width and the image is faded out from one projector to the next. This allows a constant light-level to be attained across the entire screen and a seamless look can be created. The fade out between projectors is now available built into some projectors, but it is more common for the screen processor to look after that side of the image processing. <br /><br /> The screen processor should allow a 'pixel space' to be created and outputs sent to each projector. When correctly set up, the combined projector images should be a 'window' into the pixel space. Pixel spaces can be many millions of pixels in size. Windows with 'live sources' - computer and video can then be placed in the pixel space and the outputs viewed on the projectors. A top end screen processor, like the Spyder series available from Joy’s, is able to work at many different resolutions on both input and output. To give an idea of how a single processor can be set-up for a widescreen show, we will put together a 'brief' for a technical spec. <br /><br /> <table width="500" border="0" cellpadding="20" cellspacing="0" bgcolor="#e2e2e2"> <tr> <td>The end product requires a projected screen size of 13.5m x 4m using three SXGA (1280 x 1024) projectors. <br /><br /> Inputs into the system will be :-<br /><br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 2 x PC's at XGA resolution.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 PC on a DVI input at HD resolution.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 2 x Betacam on YUV.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 x VHS on composite video.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 Vision mixer on SDI.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> Numerous company logos are available as PNG high resolution images.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> Background images are available as JPG images.<br /></td> </tr> </table> <br /> The first thing is to work out the pixel space for the system, overlap and placement of the projectors. There are a few spreadsheet applications available that will work it out for you, but here we will do it 'longhand'. <br /><br /> <table border="0" cellspacing="0" cellpadding="0"> <tr> <td width="365" valign="top"><img src="../images/img_processing.gif" alt="screen processing" width="350" height="280" border="0" /><br /><br /><b>Three projectors each display 1280 x 1024 <br /> positioned to give 192 pixel overlap. <br /> Total "Pixel Space" is 3,456 x 1024 pixels</b></td> <td> The final screen ratio is calculated by dividing the width by the height. 13.5 divided by 4 = 3.375:1. We want to use all of the projectors vertical resolution (1024 pixels), so therefore the horizontal resolution can be calculated by multiplying the vertical resolution by the aspect ratio calculated above. 1024 x 3.375 = 3,456 pixels. We now know that our pixel space will be 3,456 x 1024 pixels. The total horizontal resolution of three SXGA projectors will give us 3 x 1280 = 3,840 pixels. We must overlap our projectors to show only 3,456 pixels so we have (3,840 - 3,456 = 384 pixels too many). As we are using three projectors we will have two overlap areas, so by dividing the 384 pixels by 2 we get 192 pixel overlap. <br /><br /> It is not the intention here to work out the placement of the projectors. This will depend on available projection distance, make and model of projector and available lenses, and is something that an experienced widescreen projectionist should be able to calculate. </td> </tr> </table> <br /><br /> A Spyder 344 unit would be able to handle all of the inputs in the spec without requiring any additional matrix routing. A 344 Spyder has the capabilities of displaying 4 live layers simultaneously. Each live layer has the following inputs... <br /><br /> <table width="500" border="0" cellpadding="20" cellspacing="0" bgcolor="#e2e2e2"> <tr> <td> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 x RGB/YUV input on an HD15 connector.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 x DVI digital input.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 x HD-SDI/SDI input - auto switches between standard and high definition.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 x YC (S-VHS) input.<br /> <img src="../images/arrow_forward_orange.gif" alt="arrow" width="6" height="7" border="0" /> 1 x Composite video input.<br /> </td> </tr> </table> <br /><br /> All inputs can accept standard or hi definition video along with computer resolutions up to 2048 x 1200. Outputs are just as flexible and a 344 Spyder has 4 outputs. In our example above, three outputs would feed the three projectors and the 4th output from spyder would be available as either an operators feed showing on one monitor total programme output and preview, or it could be configured as a record feed. Full details and capabilities of Spyder are available in the '<a href="spyder_control.shtml" class=icon_lk>Spyder Screen Control</a>' section. <br /><br /> <A HREF="javascript:window.print()" class=icon_lk><img src="../images/icon_print.gif" alt="print page" width="23" height="23" border="0" /></A> <A HREF="javascript:window.print()" class=icon_lk>Print This Page</A> <br /><br /><br /> </td> </tr> </table> </td> </tr> </table> </td> <td width="13"> </td>  <td width="289" valign="top" class="sidenavbg"> <B>Error processing SSI file</B><BR> <br /> <table width="265" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td class=white_txt align="left">For further information about Joys, Spyder, 3DLive and HD projection solutions <a href="http://www.joys.com/contact.shtml" class=icon_lk>click here</a> to contact us.</td> </tr> </table> <br /><br /> </td>  </tr> </table> <br /> </td> </tr> </table>  </td> <td width="3" valign="top" bgcolor="#000000"> </td> </tr> </table>  <table width="947" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td><img src="/images/footer_img.gif" width="947" height="45" border="0" /><br /><br /> <table width="947" border="0" cellspacing="0" cellpadding="0"> <tr> <td><div class=dull> Copyright © 2008 Joys Production Services. 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