Quantcast Ghosting and Artifacts? - digitalFAQ.com Forums [Archives]
  #1  
11-15-2003, 08:20 AM
the_ray the_ray is offline
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ghosting and artifacts are still visibly clear , even though i increased the variance and max_details for both blockbusters line(0.5 ,0.7(variance)--8,10(max_details)) with script V4..although the walls(background) look pretty static now..is there anything else i could try??
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  #2  
11-15-2003, 10:04 AM
muhali3 muhali3 is offline
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check your source. does it have ghosting and artifacts? and the blockbuster line shouldn't be put up that high. Tell us what resolution your encoding at. mpg1/mpg2?
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  #3  
11-15-2003, 10:56 AM
the_ray the_ray is offline
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my source is a 2 disc xvid which i joined as one and now I am trying to make a kvcd out of it with 352x480 (MPEG1)resolution becoz my movie is like 2 hours 15 mins...and my source doesn't have ghost or artifacts..
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  #4  
11-15-2003, 10:59 AM
the_ray the_ray is offline
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btw source is at 608x320,23.976fps
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  #5  
11-15-2003, 11:47 AM
muhali3 muhali3 is offline
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if you're using the V4 script, the only thing i could recommend is enabling 3:2 pulldown in TMPGEnc. That should almost eliminate ghosting. and unless your source is extremely blocky, you could leave out the second blockbuster, and put the settings for the 1st one as:

Blockbuster(method="noise",detail_min=1,detail_max =10,variance=0.5,seed=1)
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  #6  
11-15-2003, 12:31 PM
Dialhot Dialhot is offline
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The problem is : what are you calling "Ghost" ?

A ghost image, or ghosting effect, is a near transparent copy of the image that is on the main image but moved by a few pixels.
There is no way that a ghost can appear with the filters we use !
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  #7  
11-15-2003, 10:31 PM
the_ray the_ray is offline
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DialHot...what u said is what i meant...i see a transparent "halo" over objects (humans,clocks,etc)...i'll try muhali3's recommendation and will get back to you ASAP
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  #8  
11-15-2003, 11:44 PM
the_ray the_ray is offline
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i did a couple of test using muhali3 recommendation and here are the results:-

i did this sample testing with a 1min21sec clip of an avi source where i feel the scenes in there should be fixed(walls,humans,etc --notclear)

The CQ for all my settings were at 70

1--script v4(544x480) -- size was 6984kb
2--script v4(544x480)(with 3:2 pulldown) -- size was 10315kb
3--script v4(352x480) -- size was 5323kb
4--script v4(480x480) -- size was 6412kb


The 1st one was my best with ghost scenes was about 85% removed (to my eyes)
The 2nd one was somehow jerky and there were "flying frames "around
The 3rd one was my worst with little or no improvements at all...ghost scenes were still there
The 4th was the second best with ghost scenes about 75-80% removed
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  #9  
11-16-2003, 07:12 AM
Dialhot Dialhot is offline
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What you are reporting is a complete nonsense. The filters are the same whatever the resolution so the results should be the same.

Can you upload a little sample somewhere ? I had to see this ghosting effect.
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  #10  
11-16-2003, 09:15 AM
the_ray the_ray is offline
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well i really do like to post a sample to show you... but I AM A COMPLETE NEWBIE...i just don't know where to begin...i know you'll be really MAD this time but please bare with me...can u give me directions??i already do have a lycos account but dont know how to upload
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  #11  
11-16-2003, 09:37 AM
Dialhot Dialhot is offline
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Just to be sure about something : you didn't check the "reduce ghost" feature in tmpgenc ? Did you ?
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  #12  
11-16-2003, 01:21 PM
the_ray the_ray is offline
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i didn't...must i check it ??
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  #13  
11-16-2003, 01:51 PM
Dialhot Dialhot is offline
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Not at all. I wanted to be sure you didn't because using it on a picutre that don't have a ghost default... CREATES a ghost during the encoding
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  #14  
11-17-2003, 02:48 AM
the_ray the_ray is offline
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okey DialHot i got 3 images for you to see








As you can see the 1st one is blocky and there still could be seen slight "halo""ghostly" image of the guy's left ear(this part i am not really complaining about) ...what should i do to remove the blocky part???

this is the script i used

LoadPlugin("C:\Filters\MPEG2Dec3.dll")
LoadPlugin("C:\Filters\grip.dll")
LoadPlugin("C:\Filters\undot.dll")
LoadPlugin("C:\Filters\blockbuster.dll")
LoadPlugin("C:\Filters\DctFilter.dll")
LoadPlugin ("C:\Filters\Convolution3DYV12.dll")
LoadPlugin ("C:\Filters\Sampler-2.5.dll")

AviSource("E:\movie.avi",false)
BlindPP(cpu=4)
Blockbuster(method="noise",detail_min=1,detail_max =10,variance=0.5,seed=1)
Convolution3D(1, 6, 12, 6, 8, 2.8, 0)
GripCrop(544, 480, overscan=3, source_anamorphic=false)
GripSize(resizer="LanczosResize")
Undot()
TemporalSoften(2,7,7,3,2)
DCTFilter(1,1,1,1,1,1,0.5,0)
#Blockbuster(method="noise",detail_min=1,detail_ma x=10,variance=0.3,seed=5623)
GripBorders()


CQ of 70
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  #15  
11-17-2003, 04:59 AM
Dialhot Dialhot is offline
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What you call "Ghost" is a mosquito noise effect ! For sure, there is nothing to do with a semi-transparent copy of the WHOLE image, moved by some pixels, that I describe in my previous post

If you have this despite of all the settings in the scripts that mean that your Divx is too bad (even if you do not notice the default visually, trust me, they are there). Forget it.

Crap in, crap out, there is nothing to do.

The same the for blocky walls : the script is able to reduce the effect, not to remove it as it is an internal problem of MPEG encoding.
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  #16  
11-17-2003, 05:30 AM
the_ray the_ray is offline
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i see...so is there a way where i can improve it (the wall scenes) or do i just have to bare with it
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  #17  
11-17-2003, 05:57 AM
Dialhot Dialhot is offline
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You already did all what you can do in the script.

You can try to use the feature "soften block noise" in the tab "Quantize matrix" of TMPGENC but it is not recommanded.
(it softens the blocks, but also the rest of the image )
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  #18  
11-17-2003, 07:10 AM
incredible incredible is offline
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Dialhot, ... did you already do some tests on the "Block adaptative sharpening" and "High quality block filtering" parameters in Asharp???

http://www.media-video.com/contrib/c...ins/ASharp.htm


I tried a lot using diff. parameters but = almost no difference.

... what are your results?
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  #19  
11-17-2003, 07:22 AM
the_ray the_ray is offline
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okey tried that...u're rite ...didn't help at all..overall image went soft...anyway thanx for ur help...
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  #20  
11-17-2003, 07:29 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by incredible
Dialhot, ... did you already do some tests on the "Block adaptative sharpening" and "High quality block filtering" parameters in Asharp???

http://www.media-video.com/contrib/c...ins/ASharp.htm


I tried a lot using diff. parameters but = almost no difference.

... what are your results?
Never used any sharpening filter, including asharp.

(in fact I did some test but really do not like them, so can't tell if I saw a diff or not on the part you mention).
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