I am new to blender development but as this is my area of interest I though I'd jump in. I've done some playing around in the tile branch and I've implemented a 2d corner pin node in it and I'm interested in doing some more.<br>
<br>Would we not also need a node for adding the noise back into the cg or are you planning to shoot grain plates on 50% gray?<br><br>The current industry standards for keying are really:<br><br>- The Primatte type algorithm where the 3d image space is segmented by a polygon. The details of this algorithm are of course secret as the represent the source of significant commercial competition. Time for for an open source implementation? The good thing about this style of algorithm is that the user provides input to converge the algorithm to the correct solution for the part of the image that they want to key and combine multiple keys to get the best overall key. <br>
<br>- In nuke(yes sorry), and maybe some other applications now, the IBK keyer which is a two stage process where we extract a clean screen and then the keying algorithm where we do the matte extraction. The clean screen is also useful for Additive keying techniques.<br>
<br>l guess the real state of the art is stuff like this but I haven seen it in use much and I would image it would be very slow:<br><br><font><span style="font-size:10pt"><a href="https://exchange.imperial.ac.uk/owa/redir.aspx?C=5d2afc43808841ef8294475226ee9b62&URL=http%3a%2f%2fwww.csie.ntu.edu.tw%2f%7ecyy%2fprojects%2fmatting%2fpapers%2fcvpr2001.pdf" target="_blank">http://www.csie.ntu.edu.tw/~cyy/projects/matting/papers/cvpr2001.pdf</a></span></font><br>
<br>I've found that the ultimate key technique + a simple green-minus-red + additive keyer (<a href="http://www.vfxwiki.org/tiki-index.php?page=additive+keyer">http://www.vfxwiki.org/tiki-index.php?page=additive+keyer</a>) can give a very good result but I agree there is a need for some more advanced techniques.<br>
<br>in terms of small things I think we could do with:<br><br>- Addition of an abs option to the math node.<br>- Addition of max, min options in the color mix node. <br><br><br>Adrian<br><br><br><div class="gmail_quote">On Sun, Apr 15, 2012 at 12:24 AM, Dalai Felinto <span dir="ltr"><<a href="mailto:dfelinto@gmail.com">dfelinto@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span style="font-family:Times;font-size:medium"><pre>> - Improved chroma key in Blender</pre><pre>Does any one have a reference (paper, ...) of what a state-of-the-art algorithm would be? </pre>
<pre><br></pre><pre>I helped with some of the matte nodes in Tile and can help someone willing to implement different algorithms (or perhaps implement it myself if it's inside my skill set range).</pre><pre><br></pre>
<pre>Thanks,</pre><pre>Dalai</pre><pre><br></pre><pre>#### - original email ####</pre></span><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">Hi all,</span><br><font face="monospace" size="3"><span style="white-space:pre-wrap"><br>
</span></font><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">Two days ago we tested a fancy camera to film with, see <a href="http://mango.blender.org/" target="_blank">http://mango.blender.org</a> for more info.</span><br>
<font face="monospace" size="3"><span style="white-space:pre-wrap"><br></span></font><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">We will film in the week of 7-11 May, which is just a month away only now! Time to get a couple of issues settled and organized.</span><br>
<font face="monospace" size="3"><span style="white-space:pre-wrap"><br></span></font><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">Topics I can think of:</span><br>
<font face="monospace" size="3"><span style="white-space:pre-wrap"><br></span></font><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">- Proper handling of RAW files from cameras like Sony F65 or Red Epic.</span><br>
<span style="font-family:monospace;white-space:pre-wrap;font-size:medium"> (F65 RAW stores 10 Mbyte per 4k frame, the exr half size is 40 MByte. Suspicious...)</span><br><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">- Denoise filters</span><br>
<span style="font-family:monospace;white-space:pre-wrap;font-size:medium">- Improved chroma key in Blender</span><br><font face="monospace" size="3"><span style="white-space:pre-wrap"><br>
</span></font><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">Sebastian Koenig is working in the studio here now and will be gathering feedback as well. Hopefully we can turn feedback also into actions here for coding work!</span><br>
<font face="monospace" size="3"><span style="white-space:pre-wrap"><br></span></font><span style="font-family:monospace;white-space:pre-wrap;font-size:medium">Laters,</span><br>
<font face="monospace" size="3"><span style="white-space:pre-wrap"><br></span></font><span style="font-family:Times;font-size:medium"><pre>-Ton-</pre>
</span><span style="font-family:Times;font-size:medium"><pre>### - ###</pre></span>
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