DeKafka - Revision history

Raffriff42: added category

2015-11-08T01:13:31Z

added category

← Older revision		Revision as of 03:13, 8 November 2015
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			{{FilterCat4\|External_filters\|Shared_functions\|Restoration_filters\|Logo_Removal}}
	As outlined at [http://web.archive.org/web/20050414165253/http://www11.brinkster.com/poptones/newcleus/ow.asp?Daily/4_April,_2003 my own wiki], this fairly simple filter washes away those bugging logos from broadcast clips.		As outlined at [http://web.archive.org/web/20050414165253/http://www11.brinkster.com/poptones/newcleus/ow.asp?Daily/4_April,_2003 my own wiki], this fairly simple filter washes away those bugging logos from broadcast clips.

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	Tip: even using the second version of the function, don't expect the results to be perfect. There will typically be some residual 'ghost' logo, appearing particularly when the screen area around the logo is busy. Some may find setting the layering amount parameter (Amount) to a value less than the maximum of 256 gives better results. A value of 216 for example will have the effect of greatly toning down the logo rather than trying to completely remove it.		Tip: even using the second version of the function, don't expect the results to be perfect. There will typically be some residual 'ghost' logo, appearing particularly when the screen area around the logo is busy. Some may find setting the layering amount parameter (Amount) to a value less than the maximum of 256 gives better results. A value of 216 for example will have the effect of greatly toning down the logo rather than trying to completely remove it.

	~~[[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 21:21, 18 May 2013

2013-05-18T21:21:45Z

← Older revision		Revision as of 23:21, 18 May 2013
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	[[Category:Shared functions]]		[[Category:Shared functions]]
			[[Category:External filters]]

Admin: 1 revision

2013-05-09T21:34:45Z

1 revision

← Older revision	Revision as of 23:34, 9 May 2013
(No difference)

83.217.169.188: minor fix

2013-03-25T20:55:06Z

minor fix

New page

As outlined at [http://web.archive.org/web/20050414165253/http://www11.brinkster.com/poptones/newcleus/ow.asp?Daily/4_April,_2003 my own wiki], this fairly simple filter washes away those bugging logos from broadcast clips.

Note this version works with any format, but there will be a [[RGB32]] conversion.

function dekafka(clip clip, int Xstart, int Ystart, int X, int Y, int Amount)
{
ytop = Ystart
ybot = Ystart + Y
xleft = Xstart
xright = Xstart + X
topline = clip.[[Crop]](Xstart, ytop-2, X, 2)
bottomline = clip.Crop(Xstart, ybot, X, 2)
leftline = clip.Crop(xleft-2, ytop, 2, Y)
rightline = clip.Crop(xright, ytop, 2, Y)
logosrc_hor = [[StackVertical]](topline, bottomline).Blur(0, 1.58).[[BilinearResize]](X, Y)
logosrc_ver = [[StackHorizontal]](leftline, rightline).Blur(1.58, 0).BilinearResize(X, Y)
Amount2 = (Y>=2*X) ? 255 : 128*Y/X
# Amount2 is small if X >> Y => logoscr_hor is dominant
logosrc = [[Layer]](logosrc_hor, logosrc_ver, "add", Amount2)
clip = clip.Layer(logosrc, "add", Amount, Xstart, Ystart)
return clip
}

The version above simply replaces logo in position Xstart, Ystart, size X,Y, with a blurred box.

For better results, take a screenshot of the logo, convert to a black and white bitmap with photo editing software (Paint will do), open the bitmap in VirtualDub, save as a single frame AVI, and use the version of function below:

function dekafka(clip clip, clip logo1FrameAVI, int Xstart, int Ystart, int X, int Y, int Amount)
{
ytop = Ystart
ybot = Ystart + Y
xleft = Xstart
xright = Xstart + X
topline = clip.Crop(Xstart,ytop-2,X,2)
bottomline = clip.Crop(Xstart,ybot ,X,2)
leftline = clip.Crop(xleft-2, ytop, 2, Y)
rightline = clip.Crop(xright, ytop, 2, Y)
blurbox_hor = StackVertical (topline, bottomline).Blur(0, 1.58).BilinearResize(X, Y)
blurbox_ver = StackHorizontal(leftline, rightline).Blur(1.58, 0).BilinearResize(X, Y)
amountYoverX = (Y>=2*X) ? 255 : 128*Y/X # AmountYoverX is small if X >> Y => blurbox_hor is dominant
blurbox = Layer(blurbox_hor, blurbox_ver, "add", amountYoverX)
logosnap = logo1frameAVI.BilinearResize(X,Y).ConvertToRGB32()
logomask = [[Mask#Mask|Mask]](blurbox, logosnap)
clip = clip.Layer(logomask,"add",Amount,Xstart,Ystart)
return clip
}

clip = clip.dekafka(logo1FrameAVI,Xpos,Ypos,Width,Height,Amount)

Tip: even using the second version of the function, don't expect the results to be perfect. There will typically be some residual 'ghost' logo, appearing particularly when the screen area around the logo is busy. Some may find setting the layering amount parameter (Amount) to a value less than the maximum of 256 gives better results. A value of 216 for example will have the effect of greatly toning down the logo rather than trying to completely remove it.

[[Category:Shared functions]]