Fastlinedarken

fastlinedarken
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# FastLineDarken 1.47x MT MOD #
###############################
#
# Written by Vectrangle (http://forum.doom9.org/showthread.php?t=82125)
# Didée: – Speed Boost, Updated: 11th May 2007
# Dogway – added protection option. 12-May-2011
# A.SONY – added high bit support and others. 31-Mar-2017
#
# * requires mt_masktools v2 in avs2.5 and masktools 2.2.17 in avs 2.6 or avs+
# * requires yuv input
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#
#
#
# Parameters are:
# strength (integer) – Line darkening amount, 0-256. Default 48. Represents the _maximum_ amount
# that the luma will be reduced by, weaker lines will be reduced by
# proportionately less.
# prot (integer) – Prevents the darkest lines from being darkened. Protection acts as a threshold.
# Values range from 0 (no prot) to ~50 (protect everything). Default 5.
# luma_cap (integer) – value from 0 (black) to 255 (white), used to stop the darkening
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# determination from being ‘blinded’ by bright pixels, and to stop grey
# lines on white backgrounds being darkened. Any pixels brighter than
# luma_cap are treated as only being as bright as luma_cap. Lowering
# luma_cap tends to reduce line darkening. 255 disables capping. Default 191.
# threshold (integer) – any pixels that were going to be darkened by an amount less than
# threshold will not be touched. setting this to 0 will disable it, setting
# it to 4 (default) is recommended, since often a lot of random pixels are
# marked for very slight darkening and a threshold of about 4 should fix
# them. Note if you set threshold too high, some lines will not be darkened
# thinning (integer) – optional line thinning amount, 0-256. Setting this to 0 will disable it,
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# which is gives a _big_ speed increase. Note that thinning the lines will
# inherently darken the remaining pixels in each line a little. Default 0.
#
# Changelog:
# 1.43 – update to masktools 2.2.17
# 1.42 – added high bit support in avs+ and others Optmized
# 1.4 – added protection option. Prevents darkest lines to be over darkened thus creating artifacts (i.e. aliasing, clipping…)
# – Optmized the code as suggested by Didée for possible faster processing. It also deals with the green screen bug.
# 1.3 – added ability to thin lines, now runs much slower unless thinning=0. Changed the defaults (again)
# 1.2 – huge speed increase using yv12lutxy =)
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# – weird darkening issues gone (they were caused by yv12layer)
# – show option no longer available due to optimizations. Use subtract() instead
# 1.1 – added luma_cap option
# 1.0 – initial release
#

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function FastLineDarkenMOD4( clip input, float “strength”, float “prot”, float “luma_cap”, float “threshold”, float “thinning”)
{
## parameters ##
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str = string(default(strength, 48) /128.)
lum = string(default(luma_cap, 191))
protection = default(prot,5)
thr = string(default(threshold, 4))
thinning = default(thinning,0)
thn = string(thinning /16.)

Assert(!(input.isrgb()), “FastLineDarkenMOD4: RGB Color formats is not supported” )

sisphbd = AvsPlusVersionNumber > 2294
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sislumaonly = sisphbd ? input.isy() : VersionNumber() < 2.6 ? true : input.isy8()

c = sislumaonly ? input : sisphbd ? input.converttoy() : input.converttoy8()

## filtering ##
exin = c.mt_expand(thy=255/(protection+1)).mt_inpand()
diff = VersionNumber() < 2.6 ? mt_lutxy(c,exin,yexpr="y "+lum+" x y “+lum+” < y "+lum+" ? – 0 ? 127 +",uexpr="x",vexpr="x")
: mt_lutxy(c,exin,yexpr=”y “+lum+” scalef x y “+lum+” scalef < y "+lum+" scalef ? – 0 ? 127 scalef +", use_expr=1)
linemask= thinning != 0 ? VersionNumber() < 2.6 ? mt_lut(diff.mt_inpand(),"x 127 – "+thn+" * 255 +").RemoveGrain(20,-1)
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: mt_lut(diff.mt_inpand(),”x 127 scalef – “+thn+” * range_max +”,clamp_float=true,use_expr=2).RemoveGrain(20,-1) : nop()
thick = VersionNumber() < 2.6 ? mt_lutxy(c, exin, yexpr="y "+lum+" x y “+lum+” < y "+lum+" ? – 0 ? "+str+" * x +",uexpr="x",vexpr="x",u=2, v=2)
: mt_lutxy(c, exin, yexpr=”y “+lum+” scalef x y “+lum+” scalef < y "+lum+" scalef ? – 0 ? "+str+" * x +",clamp_float=true,use_expr=1,u=2, v=2)
thin = thinning != 0 ? VersionNumber() < 2.6 ? mt_lutxy(c.mt_expand(U=2,V=2),diff,yexpr="x y 127 – "+str+" 1 + * +",u=2, v=2)
: mt_lutxy(c.mt_expand(U=2,V=2),diff,yexpr=”x y 127 scalef – “+str+” 1 + * +”, scale_inputs=”floatf”, use_expr=3,u=2, v=2) : nop()

thinning == 0 ? thick : mt_merge(thin,thick,linemask,y=3,u=2,v=2)

return sislumaonly ? last : sisphbd ? CombinePlanes(last,input,planes=”YUV”,sample_clip=input) : ytouv(input.utoy8(),input.vtoy8(),last)
}
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#############

function FastLineDarkenMOD3( clip c, int “strength”, int “prot”, int “luma_cap”, int “threshold”, int “thinning”)
{
## parameters ##
str = string(default(strength, 50) /128.)
lum = string(default(luma_cap, 191))
protection = default(prot,5)
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thr = string(default(threshold, 4))
thinning = default(thinning,0)
thn = string(thinning /16.)

## filtering ##
exin = c.mt_expand(thy=255/(protection+1)).mt_inpand()
diff = mt_lutxy(c,exin,yexpr=”y “+lum+” x y “+lum+” < y "+lum+" ? – 0 ? 127 +",uexpr="x",vexpr="x")
linemask= mt_lut(diff.mt_inpand(),”x 127 – “+thn+” * 255 +”).mt_convolution(“1 1 1″,”1 1 1″,y=3,u=0,v=0)#”.RemoveGrain(20,-1)” gives a little speed boost.
thick = mt_lutxy(c, exin, yexpr=”y “+lum+” x y “+lum+” < y "+lum+" ? – 0 ? "+str+" * x +",uexpr="x",vexpr="x")
thin = mt_lutxy(c.mt_expand(),diff,yexpr=”x y 127 – “+str+” 1 + * +”)
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(thinning == 0) ? thick : mt_merge(thin,thick,linemask,y=3)
return mergechroma(c)}

#############

function FastLineDarkenMOD2( clip c, int “strength”, int “luma_cap”, int “threshold”, int “thinning”)
{
## parameters ##
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str = string(default(strength, 48) /128.)
lum = string(default(luma_cap, 191))
thr = string(default(threshold, 4))
thinning = default(thinning,24)
thn = string(thinning /16.)

## filtering ##
exin = c.mt_expand().mt_inpand()
diff = mt_lutxy(c,exin,yexpr=”y “+lum+” x y “+lum+” < y "+lum+" ? – 0 ? 127 +",uexpr="x",vexpr="x",u=2, v=2)
linemask= mt_lut(diff.mt_inpand(),”x 127 – “+thn+” * 255 +”).mt_convolution(“1 1 1″,”1 1 1″,y=3,u=0,v=0)#”.RemoveGrain(20,-1)” gives a little speed boost.
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thick = mt_lutxy(c, exin, yexpr=”y “+lum+” x y “+lum+” < y "+lum+" ? – 0 ? "+str+" * x +",uexpr="x",vexpr="x",u=2, v=2)
thin = mt_lutxy(c.mt_expand(U=2,V=2),diff,yexpr=”x y 127 – “+str+” 1 + * +”,u=2, v=2)

return (thinning == 0) ? thick : mt_merge(thin,thick,linemask,y=3,u=2,v=2)
}
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