DeVCR - Revision history

Reel.Deal: /* Syntax and Parameters */ correction

2020-06-22T23:28:57Z

Syntax and Parameters: correction

← Older revision		Revision as of 01:28, 23 June 2020
Line 24:		Line 24:
	<br>		<br>
	::{{Par2\| \|clip\| }}		::{{Par2\| \|clip\| }}
	:::Input clip; YUV and RGB colorspaces accepted~~. Clip is converted to RGB~~.		:::Input clip; 8-bit YUV and RGB colorspaces accepted.
	<br>		<br>
	::{{Par2\|\|int\|}}		::{{Par2\|\|int\|}}
	:::<code>threshold</code>		:::<code>threshold</code>
	<br>		<br>

	== Script ==		== Script ==
	<pre>		<pre>

Reel.Deal: reformat

2020-06-22T18:40:57Z

reformat

@@ Line 1: / Line 1: @@
-{{FilterCat4|External_filters|Shared_functions|Restoration_filters|Film_Damage}}
+{{FilterCat4|External_filters|Scripts|Restoration_filters|Film_Damage}}
-== deVCR Filter 1.0 by Ricardo Garcia ==
+{{Filter3
-This filter elliminates (to a certain degree) the annoying horizontal lines that keep crawling around your VHS or Beta recorded video.
+<br>
- function DetectVCRLines(clip c,int threshold)
+== Requirements ==
+* [x86]: [[AviSynth+]] or [https://sourceforge.net/projects/avisynth2/ AviSynth 2.6]
-   spacial_data = [[GeneralConvolution]]([[ConvertToRGB]](c),0,"0 -1 0 0 2 0 0 -1 0")
+* [x64]: [[AviSynth+]]
-   bar_data = ConvertToRGB([[BilinearResize]](spacial_data,16,c.height))
+*Supported color formats: 8-bit RGB and YUV
-   st_data = [[Overlay]](bar_data,[[Trim]](bar_data,1,0),mode = "subtract")
+<br>
 Usage example:
@@ Line 33: / Line 59: @@
 [[Image:devcr.jpg]]
+<br>
-The filter's not only effective, it's quite fast. Happy transferring!
+<br>

Raffriff42: added category

2015-11-08T00:52:42Z

added category

← Older revision		Revision as of 02:52, 8 November 2015
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			{{FilterCat4\|External_filters\|Shared_functions\|Restoration_filters\|Film_Damage}}
	== deVCR Filter 1.0 by Ricardo Garcia ==		== deVCR Filter 1.0 by Ricardo Garcia ==

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	The filter's not only effective, it's quite fast. Happy transferring!		The filter's not only effective, it's quite fast. Happy transferring!

	~~[[Category:Shared functions]]~~
	~~[[Category:External filters]]~~

Admin: 1 revision

2013-05-19T22:03:18Z

1 revision

← Older revision	Revision as of 00:03, 20 May 2013
(No difference)

Wilbert at 21:18, 18 May 2013

2013-05-18T21:18:25Z

← Older revision		Revision as of 23:18, 18 May 2013
Line 36:		Line 36:

	[[Category:Shared functions]]		[[Category:Shared functions]]
			[[Category:External filters]]

Admin: 1 revision

2013-05-09T21:34:45Z

1 revision

New page

== deVCR Filter 1.0 by Ricardo Garcia ==

This filter elliminates (to a certain degree) the annoying horizontal lines that keep crawling around your VHS or Beta recorded video.
The algorithm: Calculate the difference between each pixel and the pixels above and below
(it's horizontal noise we're dealing with), and average large portions (resizing the clip to 16 pixels wide is more than enough) of it to detect the horizontal noise. Then check the difference with the next frame and see if it's effectively temporal noise.
After it's detected, just replace each pixel in the noise for the corresponding pixel in the next frame.

function DetectVCRLines(clip c,int threshold)
{
spacial_data = [[GeneralConvolution]]([[ConvertToRGB]](c),0,"0 -1 0 0 2 0 0 -1 0")
bar_data = ConvertToRGB([[BilinearResize]](spacial_data,16,c.height))
st_data = [[Overlay]](bar_data,[[Trim]](bar_data,1,0),mode = "subtract")
st_data2 = [[GreyScale|Greyscale]](Levels(st_data,threshold,10.0,threshold+1,0,255,coring = false))
st_data3 = Greyscale([[Levels]](st_data2,127,10.0,128,0,255,coring = false))
st_data4 = Overlay(st_data3,st_data3,y = -1, mode = "add")
return [[PointResize]](st_data4,c.width,c.height)
}

function deVCR(clip c,int threshold)
{
mybars = DetectVCRLines(c,threshold)
return Overlay(c,Trim(c,1,0), mask = mybars,greymask = true)
}

Usage example:

myclip = [[AviSource|AVISource]]("vcr.avi")
fixedclip = deVCR(myclip,30)
[[StackHorizontal]](myclip,fixedclip,Overlay(myclip,fixedclip,mode = "subtract"))

Here is a result of the filter (original, filtered, diff):

[[Image:devcr.jpg]]

The filter's not only effective, it's quite fast. Happy transferring!

[[Category:Shared functions]]