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Quote:
yeah, Yet Another Sequence Plugin... I have been trying to improve my zutilz plugin for the last few weeks but I got tired of looking at equations & algorithms that are way beyond my feeble intellect while humming the scarecrow's song from the Wizard of Oz...(mostly the phrase "If I only had a brain" over and over and over... :-? ) I needed work on something else for a while... So I thought that I might be able to do a better chromakey plugin. The way I saw it, the problem was that controling the key mask was much better through hsv values not rgb or yuv... EDIT: old sources and plugins have been removed... If you compile it for other platforms, please mail it to me and I will post it here let me know how it works for you- c&c will be appreciated Last edited by paprmh; 19-Feb-07 at 18:23. |
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#1
19-Apr-05, 18:21
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ThankYou,
add it with the other in the 'Blender Plugins Ressource Pages' http://www-users.cs.umn.edu/~mein/bl.../sequence.html :) |
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#2
19-Apr-05, 19:55
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http://fxhome.com/chromanator/ You can see here a nice info on how to make good chroma with DV: http://www.neopics.com/bluescreen/ Anyway, I apreciate very much your programs 
............................................
Caronte. http://www.nicodigital.com \"Some day, all will be digital\" |
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#3
20-Apr-05, 10:00
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But is it better? do you have any pic of comparaison for us?
I curious to see the difference of rgb,yuv,hsv
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Venez nous voir au Québec, on est pas sorteux! |
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#4
20-Apr-05, 17:04
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[color=darkred][EDIT 9/17/05] changed all img tags to links for the bandwidth challenged
[/color]Caronte: yes, there is alot of stuff that could be added to this- unfortunately they are most probably beyond my abilities-( see 1st post and my new favorite song ) you also have to realize that if( !!!) I ever do figure out the math involved for the filtering technics, nothing I could ever do in a seq plugin will compare with a 5.1meg standalone...ok, what can it do so far? I have heard complaints that the chromakey plugins didn't work well and the few times that I have tried them I haven't gotten the best results either...in fact, I have never been able to figure out how to use the yuv version properly(no, haven't tried all that hard either-seemed like more work than it was worth) here is a (badly compressed) green screen pix I found on the web: http://webpages.charter.net/paprmh/c...reen-front.jpg The problem with this image is the range of the green colors that you need to get rid of. with chromakey rgb the best I could do in about 10 min is: http://webpages.charter.net/paprmh/c.../rgb-front.png you can see that even though I haven't been able to get rid of all of the green, parts of the second guy's pants are starting to dissapear Maybe it's just me...can anyone else do better? here is after just a couple of minutes with hsv: http://webpages.charter.net/paprmh/c...ey/b-front.png all that is left is the darkest shadows near the feet... first I set the key color at a near middle green value from the image and then play with the h,s,&v tolerance sliders the v slider seems to make the biggest difference once you get an accurate Hue This is v.1... I haven't even bothered to add ibuf2 capabilities yet. I just wanted to see if anyone else thought that this would be a better way to control the key mask or if it was even worth working on further for that matter... |
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#5
20-Apr-05, 22:31
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The lighting of that green screen is really bad. Lighting is the most important aspect of green (or blue) screen operations. It looks like your program has done a good job on it. You'll notice a little splash on the edge of the violin, but there is nothing you can do about it. I've downloaded your script and will try it out. Not very used to HSV, but it shouldn't be too hard.
Good work. 
............................................
klatu ... birada ... nicto |
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#6
21-Apr-05, 17:33
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[color=darkred][EDIT 9/17/05] changed all img tags to links for the bandwidth challenged
[/color]Caronte:Thanks for the links btw... your link for the dv correction looks like something I might be able to do...have you got a short dv clip that you can mail me (or a link to one) to play with? I need a sample of what you are loading into the seq editor so I can test the new code. DYeater: Yeah, I picked it because it was bad-thought that it would show how much better the huv version worked - the jpg compression is bad too and that is what is causing the splash in several areas-that also made the end of the violin bow and some of the hair of the left 2 guys to dissapear I never had much use for huv before either but it really is easier to select and control the key mask that way- for me at least here is a better blue screen: http://webpages.charter.net/paprmh/c...bluestatue.jpg and the result: http://webpages.charter.net/paprmh/c...romastatue.png |
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#7
21-Apr-05, 23:05
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That's looking really nice, especially for what seems to be a quick job coding it!
I compiled it for Mac OS X 10.3: http://mke3.net/blender/etc/chromakey-hsv.1.so Of course I don't expect it to compete with 'pro' keyers like Primatte, but it would be good if at least sharp edges on the alpha mask could be softened somehow, or if there was some basic spill suppression - i.e. fade the keyed colour from the colour of the pixels around the inside edge of the mask. It's really nice so far though, could be a good candidate for eventual integration in the default Blender.
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web log |
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#8
22-Apr-05, 03:23
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thanks for the mac compile broken- I have mirrored it in the first post.
I have been trying to figure out an algorithm that will replace the key color bleeding problem...i.e, take the key color and turn it into an alpha value that will blend with a new background on the edges. ( hmmm... did anyone understand what I meant to say there?) BTW: I really hope that by "especially for what seems to be a quick job coding it! " doesn't mean "the code is crap but it works" :-? |
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#9
22-Apr-05, 07:01
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Quote:
Quote:
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web log |
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#10
22-Apr-05, 07:05
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The filters don't are very complicated, (mostly are variants of blur) I think very detailed info is in many sites on the web. Chromanator is a postproduction program, not all the 5.1 mb. are for chromakey indeed. I haven't access to my DV cam until next week, but if no one post a test video in the mean time I will prepare one short for you in one week Again, thank you very much for your work, things like these are what sequence editor needs to get more professional P.D: Sorry for my poor english
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Caronte. http://www.nicodigital.com \"Some day, all will be digital\" |
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#11
22-Apr-05, 09:07
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Caronte: I should apologize to you for my poor english... and I have no excuse as it is my only language... What I meant was that I am not much of a coder and don't have the math background to understand how alot of these alorithms actually work so I doubt I will be able to get results anywhere as good as a big program dedicated to post production...but I worded it very badly. The chrominator link is definately full of good information though and I have downloaded the demo.
broken: Actually, if you had meant that the code was bad I wouldn't have been surprised... I know that you are involved in BF developement so you would be able to recognize bad code. I am learning as I go here and the odds are quite high that my way of doing things would be considered "crappy" code - even if it does work ok. When I said c & c would be appreciated, I also hoped that a "real" coder might tell me what I could do to improve the code too. now back to google and trying to figure out how to actually implement some of this stuff... |
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#12
23-Apr-05, 06:31
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[!] maybe try b.org to get some support |
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#13
24-Apr-05, 16:34
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The Mac OS X build for this plugin also worked on my iBook with OS X 10.2.
Might even be used to create sketchy toon edges.
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Madness takes its toll. Pam ;-) |
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#14
18-May-05, 17:00
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Here are some papers you might find of interest
Review of matting techniques http://www.srcf.ucam.org/~cy214/MattingSummary.ps Matting of Natural Image Sequences using Bayesian Statistics http://www.ep.liu.se/exjobb/itn/2004/mt/016/exjobb.pdf Video matting of complex scenes http://terra.cs.nps.navy.mil/Distanc...ers/chuang.pdf Shadow Matting and compositing http://www.csie.ntu.edu.tw/~cyy/cour...ang2003SMC.pdf A Bayesian Approach to Digital Matting http://research.microsoft.com/vision...ang-CVPR01.pdf Segmentation with Invisible Keying Signal (didn't find an online version) Depth Keying http://research.microsoft.com/~eyalo...y/DepthKey.pdf LetterRip |
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#15
19-May-05, 09:06
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Sorry folks, I got sidetracked by another little project ( a cooperative effort!) but now that I have pretty much finished it, I am going to get back to work on hsv again.
LetterRip: Thanks for the links - but those will take me a while to wade through... just skimming a couple of them gave me a headache but I did dl all but the 1st - link broken.I think that maybe all of the effects necessary for sucessful composting may be done better with a series of plugins - one for each effect needed. ( ie: chromakey, difference matte, dv filter, color bleed, edge smooth, etc.) part of the reason is that there are limits to what you can stuff into each plugin...found that out in my little side project. Some effects could be combined but I think that all in one plugin is out of the question. speaking of dv filter, Caronte: have you (or anyone else for that matter) got a short clip that you can either send me or give me a link to? I need something to play with - I don't even know what format you are importing it into blender with... let alone how it looks in the seq editor. Anyway, here is a quick tip: you can stack several hsv's on top of each other for more control of your key color... more to come... hopefully soon
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I have found that for the most part, it is better for me to keep my mouth shut and let people think that I am stupid than to open my mouth and prove it... dang... did it again \\//_ 
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#16
20-May-05, 00:48
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The post script does seem to be missing, here is the google cache of the item,
http://tinyurl.com/chhrv LetterRip |
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#17
20-May-05, 03:08
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I'd suggest instead of doing things as a plugin, it be a core tool.
Possibly write up a proposal for the wiki, LetterRip |
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#18
20-May-05, 03:10
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[color=darkred][EDIT 9/17/05] changed all img tags to links for the bandwidth challenged
[/color]Here is a test to see how well I could do with these two pictures using hsv: http://webpages.charter.net/paprmh/chromakey/moon.jpg http://webpages.charter.net/paprmh/c...ey/owlblue.jpg here is a 375 k.png of the owl: http://webpages.charter.net/paprmh/c...ey/owlblue.png This is after first pass with red mask for contrast: http://webpages.charter.net/paprmh/c.../owlC1r.75.jpg alot of bleed...hmmm... a few more passes with a little alpha on the mask color... http://webpages.charter.net/paprmh/c...y/owlalpha.jpg not great, but you get the idea... http://webpages.charter.net/paprmh/c...wlmoonshot.jpg
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I have found that for the most part, it is better for me to keep my mouth shut and let people think that I am stupid than to open my mouth and prove it... dang... did it again \\//_
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#19
23-May-05, 09:39
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[color=darkred][EDIT 9/17/05] changed all img tags to links for the bandwidth challenged
[/color]I also decided to try hsv on a movie clip. I used the demo files for chrominator located here http://fxhome.com/chromanator/downlo...artFootage.zip I think that the greenscreen is really poor ( go figure- it's the salespitch for their software...) but I think I did pretty well This is all done in blender and the seq editor... one of the hardest frames is #12: http://webpages.charter.net/paprmh/c.../testfra12.jpg and this is a 1 meg xvid of the 44 frames: http://webpages.charter.net/paprmh/c...t0001_0044.avi I would like to see anybody that has other compositing apps download the above clips and see what kind of results they can get with them - I would like to see how badly you guys can beat my results... [color=darkred] [ :< ]...yeah... I DARE you! [/ :< ] [/color]
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I have found that for the most part, it is better for me to keep my mouth shut and let people think that I am stupid than to open my mouth and prove it... dang... did it again \\//_
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#20
24-May-05, 02:59
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and I started to update chromakey-hsv for 2.43( actually it's almost done...). I fixed a few bugs, updated for 2.43, removed the zoom feature ( you can zoom the preview window now ), and tried to improve it a bit - and then 
