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	<title>Huixuan&#039;s wlog</title>
	<atom:link href="http://hxtang.wordpress.com/feed/" rel="self" type="application/rss+xml" />
	<link>https://hxtang.wordpress.com</link>
	<description>on computational photography and others</description>
	<lastBuildDate>Mon, 27 Jun 2011 20:55:24 +0000</lastBuildDate>
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		<title>Huixuan&#039;s wlog</title>
		<link>https://hxtang.wordpress.com</link>
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		<item>
		<title>a very incomplete and biased sampling of cvpr2011 papers and thoughts</title>
		<link>https://hxtang.wordpress.com/2011/06/27/a-very-incomplete-and-biased-sampling-of-cvpr2011-papers-and-thoughts/</link>
		<comments>https://hxtang.wordpress.com/2011/06/27/a-very-incomplete-and-biased-sampling-of-cvpr2011-papers-and-thoughts/#comments</comments>
		<pubDate>Sun, 26 Jun 2011 20:03:06 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=316</guid>
		<description><![CDATA[This is a set of interesting papers in cvpr2011 as well as my thoughts after seeing these papers. My selection of the papers and comments is very biased because I am much more interested in producing nice pictures than understanding their contents, and I wasn&#8217;t able to attend some of the posters/orals because there&#8217;s time [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=316&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>https://hxtang.wordpress.com/2011/06/27/a-very-incomplete-and-biased-sampling-of-cvpr2011-papers-and-thoughts/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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		<title>Variational Bayes approach to kernel estimation</title>
		<link>https://hxtang.wordpress.com/2011/03/22/variational-bayes-approach-to-kernel-estimation/</link>
		<comments>https://hxtang.wordpress.com/2011/03/22/variational-bayes-approach-to-kernel-estimation/#comments</comments>
		<pubDate>Tue, 22 Mar 2011 05:53:03 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[paper reading]]></category>
		<category><![CDATA[wlog]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=304</guid>
		<description><![CDATA[Reference: [1]   James Miskin ,  David J.C. MacKay, Ensemble Learning for Blind Image Separation and Deconvolution, In Adv. in Independent Component Analysis, M. Girolani, Ed. Springer-Verlag.2000. [2]   R. Fergus et al., Removing camera shake from a single photograph, SIGGRAPH2006. [3]   O. Whyte, J. Sivic, A. Zisserman, and J. Ponce, Non-uniform deblurring for shaken images, CVPR2010. [4]   C. M. [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=304&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>https://hxtang.wordpress.com/2011/03/22/variational-bayes-approach-to-kernel-estimation/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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		<item>
		<title>MAP_K approach to kernel estimation under Gaussian prior</title>
		<link>https://hxtang.wordpress.com/2011/03/18/latex-map_k-approach-to-kernel-estimation-under-gaussian-prior/</link>
		<comments>https://hxtang.wordpress.com/2011/03/18/latex-map_k-approach-to-kernel-estimation-under-gaussian-prior/#comments</comments>
		<pubDate>Fri, 18 Mar 2011 00:25:13 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[paper reading]]></category>
		<category><![CDATA[wlog]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=263</guid>
		<description><![CDATA[The following note excerpts from &#8220;Understanding and Evaluating Blind Deconvolution Algorithms&#8221; by Anat Levin. Let , and be the Fourier transform of original image , blurry image and blurring kernel . Assuming Gaussian prior on , i.e. , where . Here and are Fourier transform of image derivative operators and . Then also follows a [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=263&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>Matlab+X11的诡异问题</title>
		<link>https://hxtang.wordpress.com/2011/03/12/matlabx11%e7%9a%84%e8%af%a1%e5%bc%82%e9%97%ae%e9%a2%98/</link>
		<comments>https://hxtang.wordpress.com/2011/03/12/matlabx11%e7%9a%84%e8%af%a1%e5%bc%82%e9%97%ae%e9%a2%98/#comments</comments>
		<pubDate>Sat, 12 Mar 2011 00:14:44 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[tools]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=235</guid>
		<description><![CDATA[我的设置肯定没有问题，因为xclock确实显示在本地。但是开matlab，一模一样的display设置，窗口每次都是显示在remotehost端，无法理解⋯⋯ 算了，在大屏上看figure也挺好的⋯⋯ 好吧⋯⋯最后解决了⋯⋯打开matlab的时候用 matlab -noawt 原来用了 matlab -nodesktop 所以figure不是用X11的&#8230; Filed under: tools<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=235&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>g++和vnl_matrix_inverse的兼容问题</title>
		<link>https://hxtang.wordpress.com/2011/03/09/g%e5%92%8cvnl_matrix_inverse%e7%9a%84%e5%85%bc%e5%ae%b9%e9%97%ae%e9%a2%98/</link>
		<comments>https://hxtang.wordpress.com/2011/03/09/g%e5%92%8cvnl_matrix_inverse%e7%9a%84%e5%85%bc%e5%ae%b9%e9%97%ae%e9%a2%98/#comments</comments>
		<pubDate>Wed, 09 Mar 2011 05:27:33 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[tools]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=232</guid>
		<description><![CDATA[今天终于完全figure out了TA的过程当中遇到的vnl_matrix_inverse在我机器上报private copy constructor错误的问题。看起来似乎是个语法问题，但vxl的文档写明了 x = vnl_matrix_inverse(A)*b; 和 x = vnl_svd(A).solve(b); 是等价的。 后来发现是因为我的g++编译器版本是4.2.1，把g++版本换到4.3.5以后就能通过编译了。 Filed under: tools<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=232&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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		<title>matlab in textmate + iterm + applescript</title>
		<link>https://hxtang.wordpress.com/2011/03/04/matlab-in-textmateitermapplescript/</link>
		<comments>https://hxtang.wordpress.com/2011/03/04/matlab-in-textmateitermapplescript/#comments</comments>
		<pubDate>Fri, 04 Mar 2011 05:09:05 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[tools]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=221</guid>
		<description><![CDATA[不知道什么时候生出来的变态想法，不想好好地用matlab自带的desktop+editor，而想用textmate+iterm的组合。我觉得一定程度上是因为感觉上一个文本编辑器＋terminal的组合很lightweight，也许就是纯粹洁癖而已。如果一定要使用的原因，那么就是textmate有bundles，啥重复性的任务基本都可以(在写了script后)快捷键一把。 现在还没有100％地搞定，先写一下大致的思想，以后慢慢补全吧。 俺需要的功能，主要就是textmate和iterm的交互了。 - 打开matlab并进入项目主目录。 这个用applescript就能做，其实手动也可以的。唯一的trick是iterm打开的时候要开好x11，否则matlab的graphics没法显示。 补充一下网上可以搜到一个叫pos的utility，可以从finder打开terminal，并cd到当前目录。这个很好用的说。 - 从textmate上进行断点调试，并用bookmark来标记／取消断点。 这个地方有点tricky。俺的想法是从textmate给iterm window 发送dbstop/dbclear等命令，并同时trigger bookmark当前行的快捷键。嗯，很dirty&#8230; 比较郁闷的是textmate添加和取消bookmark是一个命令，但是matlab添加和取消断点是不同命令。现在想到个很土的hack是写个函数来读断点状态以确定call哪个函数&#8230; 还没有想到怎么清除一个project里面所有的bookmark&#8230; - 看workspace。 这个不知道怎么弄。 Filed under: tools<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=221&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>1</slash:comments>
	
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		<title>DxO</title>
		<link>https://hxtang.wordpress.com/2011/03/04/dxo/</link>
		<comments>https://hxtang.wordpress.com/2011/03/04/dxo/#comments</comments>
		<pubDate>Thu, 03 Mar 2011 23:18:02 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[fun]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=218</guid>
		<description><![CDATA[http://www.dxo.com 一个法国公司，做的方向和俺的很很很相关⋯⋯做学术也做产品。这年头看到学术成果能产品化俺就很赞赏。 btw Nokia这两年用的那个EDoF technique就是买的他们家的，我原来写过这篇blog提到了。 Filed under: fun<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=218&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>1</slash:comments>
	
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			<media:title type="html">hxtang</media:title>
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		<title>奇怪的现象</title>
		<link>https://hxtang.wordpress.com/2011/03/03/%e5%a5%87%e6%80%aa%e7%9a%84%e7%8e%b0%e8%b1%a1/</link>
		<comments>https://hxtang.wordpress.com/2011/03/03/%e5%a5%87%e6%80%aa%e7%9a%84%e7%8e%b0%e8%b1%a1/#comments</comments>
		<pubDate>Thu, 03 Mar 2011 02:40:58 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[experiment]]></category>
		<category><![CDATA[wlog]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=215</guid>
		<description><![CDATA[在不同物距标定光心，竟然晃动能有40-50pixel，图像的尺寸是2820&#215;1876. 检查了数据好几遍，算法的稳定性挺好的，稍微有点噪声抖动在10pixel以内。直接看数据光心也确实是动了。 不同的物距，magnification 和distortion的弯曲度也是不一样，这倒是不奇怪。 Filed under: experiment, wlog<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=215&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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		<title>Notes: Optical Imaging and Aberrations</title>
		<link>https://hxtang.wordpress.com/2011/03/01/notes-calculation-of-primary-aberrations-refracting-systems/</link>
		<comments>https://hxtang.wordpress.com/2011/03/01/notes-calculation-of-primary-aberrations-refracting-systems/#comments</comments>
		<pubDate>Tue, 01 Mar 2011 03:54:40 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[paper reading]]></category>
		<category><![CDATA[wlog]]></category>

		<guid isPermaLink="false">https://hxtang.wordpress.com/2011/03/01/notes-calculation-of-primary-aberrations-refracting-systems/</guid>
		<description><![CDATA[1. Foundations of geometric optics Light travels with different velocity in different medium. This speed is often characterized by the reflective index : where is the speed of light in vaccum and denotes the (phase) speed in the medium. Consequently, the time a ray takes to travel from point to though a path is proportional [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=204&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>camera control的几个trick</title>
		<link>https://hxtang.wordpress.com/2011/02/22/camera-control%e7%9a%84%e5%87%a0%e4%b8%aatrick/</link>
		<comments>https://hxtang.wordpress.com/2011/02/22/camera-control%e7%9a%84%e5%87%a0%e4%b8%aatrick/#comments</comments>
		<pubDate>Tue, 22 Feb 2011 01:30:51 +0000</pubDate>
		<dc:creator>hxtang</dc:creator>
				<category><![CDATA[experiment]]></category>
		<category><![CDATA[tools]]></category>
		<category><![CDATA[wlog]]></category>

		<guid isPermaLink="false">http://hxtang.wordpress.com/?p=200</guid>
		<description><![CDATA[在拍照前要确保写进去的新文件原来不存在，也就是不能overwrite 因为overwrite速度会偏慢，然后程序又送新的命令进去，camera太busy了整个控制程序就崩溃了&#8230; 单纯refocus不拍照需要打开liveview，否则不work&#8230; 用的program基本和canon sdk给的那个例子一样 Filed under: experiment, tools, wlog<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hxtang.wordpress.com&amp;blog=5388836&amp;post=200&amp;subd=hxtang&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>1</slash:comments>
	
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