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{mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} </style> <![endif]--> <meta name=description content="liu shuaicheng's personal homepage"> <script language="JavaScript" type="text/javascript"> <!-- function popitup(url) { newwindow=window.open(url,'name','height=200,width=150'); if (window.focus) {newwindow.focus()} return false; } // --> </script> <script TYPE="text/javascript"> <!-- function popup(mylink, windowname) { if (! window.focus)return true; var href; if (typeof(mylink) == 'string') href=mylink; else href=mylink.href; window.open(href, windowname, 'width=800,height=300,scrollbars=yes,menubar=no'); return false; } //--> </script> <!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="2050"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> </head> <body bgcolor=white lang=EN-US link=blue vlink=purple style='tab-interval:.5in; border:none;border-top:solid gray 3.0pt;padding:0in 0in 0in 0in'> <div class=WordSection1> <h1 align=center style='text-align:center'><span lang=EN style='font-family: "Verdana","sans-serif";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN'>Colorization for Single Image Super Resolution <o:p></o:p></span></h1> <div align=center> <table class=MsoNormalTable border=0 cellpadding=0 width="70%" style='width:70.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184;mso-padding-alt: 0in 13.85pt 0in 13.85pt' height=4895> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;height:66.75pt'> <td style='padding:.75pt .75pt .75pt .75pt;height:66.75pt'> <p><span style='font-family:"Verdana","sans-serif"'>&nbsp;&nbsp;&nbsp;&nbsp; <o:p></o:p></span></p> <p align=center style='text-align:center'><strong><span style='font-family: "Verdana","sans-serif"'><a href="http://www.comp.nus.edu.sg/~liu727/">Shuaicheng Liu</a></span></strong><span style='font-family:"Verdana","sans-serif"'>* , <strong><span style='font-family:"Verdana","sans-serif"'><a href="http://www.comp.nus.edu.sg/~brown/">Michael S. Brown</a></span></strong>* , <strong><span style='font-family:"Verdana","sans-serif"'><a href="http://cs.unc.edu/~sjkim/">Seon Joo Kim</a></span></strong>*,&nbsp; <strong><span style='font-family:"Verdana","sans-serif"'><a href="http://yuwing.kaist.ac.kr/">Yu-Wing Tai</a></span></strong>** <o:p></o:p></span></p> <p align=center style='text-align:center'><span style='font-family:"Verdana","sans-serif"'>*<strong><span style='font-family:"Verdana","sans-serif"'>NUS (National University of Singapore)</span></strong><o:p></o:p></span></p> <p align=center style='text-align:center'><span style='font-family:"Verdana","sans-serif"'>** <strong><span style='font-family:"Verdana","sans-serif"'>KAIST (Korean Advanced Institute of Science and Technology) </span></strong><o:p></o:p></span></p> <p align=center style='text-align:center'><span style='font-family:"Verdana","sans-serif"'>&nbsp;<o:p></o:p></span></p> <p><strong><span style='font-family:"Verdana","sans-serif"'>Abstract</span></strong><span style='font-family:"Verdana","sans-serif"'> We introduce a new procedure to handle color in image super resolution (SR). Most existing SR techniques focus primarily on enforcing image priors or synthesizing image details; less attention is paid to the final color assignment. As a result, many existing SR techniques exhibit some form of color aberration in the <br clear=all style='page-break-before:always'> final upsampled image. In this paper, we outline a procedure based on image colorization and back-projection to perform color assignment guided by the super resolution luminance channel. We have found that our procedure produces better results both quantitatively and qualitatively than existing approaches. In addition, our approach is generic and can be incorporated into any existing SR techniques.<o:p></o:p></span></p> <p><span style='font-family:"Verdana","sans-serif"'>&nbsp;<o:p></o:p></span></p> </td> </tr> <tr style='mso-yfti-irow:1;height:21.75pt'> <td width=202 style='width:151.5pt;background:#3399FF;padding:.75pt .75pt .75pt .75pt; height:21.75pt'> <p class=MsoNormal><strong><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman"'>Framework</span></strong><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> <tr style='mso-yfti-irow:2;height:66.75pt'> <td style='padding:.75pt .75pt .75pt .75pt;height:66.75pt'> <p><span style='font-family:"Verdana","sans-serif"'>&nbsp;&nbsp;&nbsp;&nbsp;</span><span style='font-family:"Verdana","sans-serif";mso-no-proof:yes'><img border=0 width=800 height=444 id="_x0000_i1055" src="images/framework.png"></span><span style='font-family:"Verdana","sans-serif"'><o:p></o:p></span></p> </td> </tr> <tr style='mso-yfti-irow:3;height:21.75pt'> <td style='background:#3399FF;padding:.75pt .75pt .75pt .75pt;height:21.75pt'> <p class=MsoNormal><strong><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman"'>Code</span></strong><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'> <o:p></o:p></span></p> </td> </tr> <tr style='mso-yfti-irow:4;height:22.5pt'> <td style='padding:.75pt .75pt .75pt .75pt;height:22.5pt'> <p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'>Executables [<a href="ColorizationSR.zip">download</a>]&nbsp; <o:p></o:p></span></p> </td> </tr> <tr style='mso-yfti-irow:5;height:21.75pt'> <td style='background:#3399FF;padding:.75pt .75pt .75pt .75pt;height:21.75pt'> <p class=MsoNormal><strong><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman"'>Results</span></strong><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> <tr style='mso-yfti-irow:6;height:22.5pt'> <td style='padding:.75pt .75pt .75pt .75pt;height:22.5pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:7.5pt'> <td width=208 style='width:156.0pt;padding:.75pt .75pt .75pt .75pt; height:7.5pt'> <p class=MsoNormal align=center style='text-align:center;mso-line-height-alt: 7.5pt'><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family: "Times New Roman"'>input:<o:p></o:p></span></p> </td> <td width=258 style='width:193.5pt;padding:.75pt .75pt .75pt .75pt; height:7.5pt'> <p class=MsoNormal align=center style='text-align:center;mso-line-height-alt: 7.5pt'><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family: "Times New Roman"'>output:<o:p></o:p></span></p> </td> </tr> </table> </div> </td> </tr> <tr style='mso-yfti-irow:7;height:134.25pt'> <td style='padding:0in 13.85pt 0in 13.85pt;height:134.25pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:112.5pt'> <td width=208 style='width:156.0pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal align=center style='text-align:center'><a href="peper.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=64 height=64 id="_x0000_i1054" src="images/peper/small.JPG"></span></a><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> <td width=258 style='width:193.5pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal><a href="peper.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=256 height=256 id="_x0000_i1053" src="images/peper/peper.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> </table> </div> </td> </tr> <tr style='mso-yfti-irow:8;height:134.25pt'> <td style='padding:0in 13.85pt 0in 13.85pt;height:134.25pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:112.5pt'> <td width=208 style='width:156.0pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal align=center style='text-align:center'><a href="apple.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=64 height=64 id="_x0000_i1052" src="images/apple/small.JPG"></span></a><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> <td width=258 style='width:193.5pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal><a href="apple.htm" target="_top"><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"; mso-no-proof:yes;text-decoration:none;text-underline:none'><img border=0 width=256 height=256 id="_x0000_i1051" src="images/apple/apple.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> </table> </div> </td> </tr> <tr style='mso-yfti-irow:9;height:134.25pt'> <td style='padding:0in 13.85pt 0in 13.85pt;height:134.25pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:112.5pt'> <td width=208 style='width:156.0pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal align=center style='text-align:center'><a href="bag.htm"><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"; mso-no-proof:yes;text-decoration:none;text-underline:none'><img border=0 width=64 height=64 id="_x0000_i1050" src="images/bag/small.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> <td width=258 style='width:193.5pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal><a href="bag.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=256 height=256 id="_x0000_i1049" src="images/bag/bag.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> </table> </div> </td> </tr> <tr style='mso-yfti-irow:10;height:134.25pt'> <td style='padding:0in 13.85pt 0in 13.85pt;height:134.25pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:112.5pt'> <td width=208 style='width:156.0pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal align=center style='text-align:center'><a href="land.htm"><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"; mso-no-proof:yes;text-decoration:none;text-underline:none'><img border=0 width=64 height=64 id="_x0000_i1048" src="images/land/small.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> <td width=258 style='width:193.5pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal><a href="land.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=256 height=256 id="_x0000_i1047" src="images/land/land.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> </table> </div> </td> </tr> <tr style='mso-yfti-irow:11;height:134.25pt'> <td style='padding:0in 13.85pt 0in 13.85pt;height:134.25pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; 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display:none;mso-hide:all'><o:p>&nbsp;</o:p></span></p> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; height:112.5pt'> <td width=208 style='width:156.0pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal align=center style='text-align:center'><a href="windmill.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=64 height=64 id="_x0000_i1044" src="images/windmill/small.JPG"></span></a><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> <td width=258 style='width:193.5pt;padding:.75pt .75pt .75pt .75pt; height:112.5pt'> <p class=MsoNormal><a href="windmill.htm"><span style='font-family:"Verdana","sans-serif"; mso-fareast-font-family:"Times New Roman";mso-no-proof:yes;text-decoration: none;text-underline:none'><img border=0 width=256 height=256 id="_x0000_i1043" src="images/windmill/windmill.JPG"></span></a><span style='font-family:"Verdana","sans-serif";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p> </td> </tr> </table> </div> </td> </tr> <tr style='mso-yfti-irow:12;height:134.25pt'> <td style='padding:0in 13.85pt 0in 13.85pt;height:134.25pt'> <div align=center> <table class=MsoNormalTable border=1 cellpadding=0 width="59%" style='width:59.0%;mso-cellspacing:1.5pt;mso-yfti-tbllook:1184'> <tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes;mso-yfti-lastrow:yes; 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