Limiter - Revision history

FranceBB: Swapped "autoscale" with paramscale which is the right parameter for scaling values automaticaly inside Limiter()

2020-09-25T12:15:53Z

Swapped "autoscale" with paramscale which is the right parameter for scaling values automaticaly inside Limiter()

← Older revision		Revision as of 14:15, 25 September 2020
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	{{AvsPluscon}} By default all parameters are ''non''-[[Autoscale_parameter\|autoscaling]] – they must be scaled to the target bit depth.<br>		{{AvsPluscon}} By default all parameters are ''non''-[[Autoscale_parameter\|autoscaling]] – they must be scaled to the target bit depth.<br>
	By using parameter ''~~autoscale~~'' the range parameters are treated to be of 8 bits range and will be scaled to the current bit depth automatically		By using parameter ''paramscale'' the range parameters are treated to be of 8 bits range and will be scaled to the current bit depth automatically
	</div>		</div>

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	}}		}}
	<br>{{Template:FuncDef		<br>{{Template:FuncDef
	\|{{AvsPluscon}} Limiter(clip ''clip'' [, float ''min_luma'', float ''max_luma'', float ''min_chroma'', float ''max_chroma'', string ''show'', bool ''~~autoscale~~'' ] )		\|{{AvsPluscon}} Limiter(clip ''clip'' [, float ''min_luma'', float ''max_luma'', float ''min_chroma'', float ''max_chroma'', string ''show'', bool ''paramscale'' ] )
	}}		}}

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	</div>		</div>

	:{{AvsPluscon}} {{Par2\|~~autoscale~~\|bool\|false}}		:{{AvsPluscon}} {{Par2\|paramscale\|bool\|false}}
	:: If set, minimum/maximum luma/chroma values are treated as they were in 8 bit range (but non-integer values are allowed), limiter will autoscale them to the current bit depth of the clip.		:: If set, minimum/maximum luma/chroma values are treated as they were in 8 bit range (but non-integer values are allowed), limiter will autoscale them to the current bit depth of the clip.
	:: Conversion uses the bit-shift method for integer bit depth conversion (from 8 to 8-16 bits). For 32 bit float clips the conversion is value/255.0 for Y (luma) channel and (value-128)/255.0 for U/V chroma channels. Do not use ~~autoscale~~ when you want to limit 32 bit float chroma exactly to +/-0.5, give the parameters directly instead.		:: Conversion uses the bit-shift method for integer bit depth conversion (from 8 to 8-16 bits). For 32 bit float clips the conversion is value/255.0 for Y (luma) channel and (value-128)/255.0 for U/V chroma channels. Do not use paramscale when you want to limit 32 bit float chroma exactly to +/-0.5, give the parameters directly instead.
	::Default: does not scale at all, parameters are used as-is. Parameters now are of float type to handle 32 bit float values..		::Default: does not scale at all, parameters are used as-is. Parameters now are of float type to handle 32 bit float values..

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	\| {{AvsPluscon}} r2724		\| {{AvsPluscon}} r2724
	\| Added support for float.		\| Added support for float.
	Added ''~~autoscale~~''		Added ''paramscale''
	\|-		\|-
	\| {{AvsPluscon}}		\| {{AvsPluscon}}

Pinterf: Update for avs+ r2724: float allowed, autoscale option

2018-07-02T09:31:08Z

Update for avs+ r2724: float allowed, autoscale option

← Older revision		Revision as of 11:31, 2 July 2018
Line 6:		Line 6:
	'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.		'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.

	{{AvsPluscon}} all parameters are ''non''-[[Autoscale_parameter\|autoscaling]] – they must be scaled to the target bit depth.		{{AvsPluscon}} By default all parameters are ''non''-[[Autoscale_parameter\|autoscaling]] – they must be scaled to the target bit depth.<br>
			By using parameter ''autoscale'' the range parameters are treated to be of 8 bits range and will be scaled to the current bit depth automatically
	</div>		</div>

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	<div style="max-width:62em" >		<div style="max-width:62em" >
	{{Template:FuncDef		{{Template:FuncDef
	\|Limiter(clip ''clip'' [, int ''min_luma'', int ''max_luma'', int ''min_chroma'', int ''max_chroma'', string show ] )		\|Limiter(clip ''clip'' [, int ''min_luma'', int ''max_luma'', int ''min_chroma'', int ''max_chroma'', string ''show'' ] )
			}}
			<br>{{Template:FuncDef
			\|{{AvsPluscon}} Limiter(clip ''clip'' [, float ''min_luma'', float ''max_luma'', float ''min_chroma'', float ''max_chroma'', string ''show'', bool ''autoscale'' ] )
	}}		}}

	:{{Par2\|clip\|clip\|(required)}}		:{{Par2\|clip\|clip\|(required)}}
	::Source clip. [[YUV]] only.		::Source clip. [[YUV]] only.
	::{{AvsPluscon}} also supports [[YUVA]]~~. [[Float_(color_format)\|Floating point]] not supported~~.		::{{AvsPluscon}} also supports [[YUVA]].

	:{{Par2\|min_luma\|int\|16{{Template:D}}}}		:{{Par2\|min_luma\|int\|16{{Template:D}}}}
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	\|}		\|}
	</div>		</div>

			:{{AvsPluscon}} {{Par2\|autoscale\|bool\|false}}
			:: If set, minimum/maximum luma/chroma values are treated as they were in 8 bit range (but non-integer values are allowed), limiter will autoscale them to the current bit depth of the clip.
			:: Conversion uses the bit-shift method for integer bit depth conversion (from 8 to 8-16 bits). For 32 bit float clips the conversion is value/255.0 for Y (luma) channel and (value-128)/255.0 for U/V chroma channels. Do not use autoscale when you want to limit 32 bit float chroma exactly to +/-0.5, give the parameters directly instead.
			::Default: does not scale at all, parameters are used as-is. Parameters now are of float type to handle 32 bit float values..


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	== Changes ==		== Changes ==
	{\| border="1"		{\| border="1"
			\|-
			\| {{AvsPluscon}} r2724
			\| Added support for float.
			Added ''autoscale''
			\|-
			\| {{AvsPluscon}}
			\| Added support for 8-16bit color spaces.
	\|-		\|-
	\| v2.60		\| v2.60

Raffriff42: note AVS+ differences

2017-04-28T20:57:23Z

note AVS+ differences

← Older revision		Revision as of 22:57, 28 April 2017
Line 5:		Line 5:

	'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.		'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.

			{{AvsPluscon}} all parameters are ''non''-[[Autoscale_parameter\|autoscaling]] – they must be scaled to the target bit depth.
	</div>		</div>

	__TOC__		__TOC__

Line 16:		Line 19:
	:{{Par2\|clip\|clip\|(required)}}		:{{Par2\|clip\|clip\|(required)}}
	::Source clip. [[YUV]] only.		::Source clip. [[YUV]] only.
			::{{AvsPluscon}} also supports [[YUVA]]. [[Float_(color_format)\|Floating point]] not supported.

	:{{Par2\|min_luma\|int\|16}}		:{{Par2\|min_luma\|int\|16{{Template:D}}}}
	::''Y'' (luma) lower bound.		::''Y'' (luma) lower bound.

	:{{Par2\|max_luma\|int\|235}}		:{{Par2\|max_luma\|int\|235{{Template:D}}}}
	::''Y'' (luma) upper bound.		::''Y'' (luma) upper bound.

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	::''U'' & ''V'' (chroma) lower bound.		::''U'' & ''V'' (chroma) lower bound.

	:{{Par2\|max_chroma\|int\|240}}		:{{Par2\|max_chroma\|int\|240{{Template:D}}}}
	::''U'' & ''V'' (chroma) upper bound.		::''U'' & ''V'' (chroma) upper bound.

Raffriff42: formatting

2016-02-28T09:19:35Z

formatting

← Older revision		Revision as of 11:19, 28 February 2016
Line 1:		Line 1:
			<div style="max-width:62em" >
	The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. This is the normal luminance range. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" these ranges according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>		The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. This is the normal luminance range. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" these ranges according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>

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	'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.		'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.
			</div>
	__TOC__		__TOC__

	== Syntax and Parameters ==		== Syntax and Parameters ==
			<div style="max-width:62em" >
	{{Template:FuncDef		{{Template:FuncDef
	\|Limiter(clip ''clip'' [, int ''min_luma'', int ''max_luma'', int ''min_chroma'', int ''max_chroma'', string show ] )		\|Limiter(clip ''clip'' [, int ''min_luma'', int ''max_luma'', int ''min_chroma'', int ''max_chroma'', string show ] )
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	\|  {{BoldColor\|#FF00FF\|120\|&diams;}} magenta		\|  {{BoldColor\|#FF00FF\|120\|&diams;}} magenta
	\|}		\|}
			</div>


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	[[FFmpegSource\|FFmpegSource2]]("[http://www.sintel.org/ sintel].mp4")		[[FFmpegSource\|FFmpegSource2]]("[http://www.sintel.org/ sintel].mp4")
	[[Trim]](4685, 4685)		[[Trim]](4685, 4685)
	~~[[ColorYUV]](analyze=true)~~
	\|-
	~~\|[[File:Limit_Ex01.jpg]]~~
	\|}

	~~:{\|~~
	~~\| style="margin:0.5em;"\|~~
	# 2. Exaggerated luma and chroma range		# 2. Exaggerated luma and chroma range
	~~[...]~~
	[[Levels]](16, 1.0, 255-16, 0, 255, coring=false)		[[Levels]](16, 1.0, 255-16, 0, 255, coring=false)
	[[Tweak]](sat=2.0, coring=false)		[[Tweak]](sat=2.0, coring=false)
			# (''insert Limiter here'')
	ColorYUV(analyze=true)		ColorYUV(analyze=true)
	\|-		\|-
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	\|[[File:Limit_Ex07a.png\|768px]]		\|[[File:Limit_Ex07a.png\|768px]]
	\|}		\|}


	== Changes ==		== Changes ==

Admin at 18:32, 25 January 2016

2016-01-25T18:32:18Z

← Older revision		Revision as of 20:32, 25 January 2016
Line 15:		Line 15:

	:{{Par2\|min_luma\|int\|16}}		:{{Par2\|min_luma\|int\|16}}
	::''Y'' (luma) lower ~~clamping limit~~.		::''Y'' (luma) lower bound.

	:{{Par2\|max_luma\|int\|235}}		:{{Par2\|max_luma\|int\|235}}
	::''Y'' (luma) upper ~~clamping limit~~.		::''Y'' (luma) upper bound.

	:{{Par2\|min_chroma\|int\|16}}		:{{Par2\|min_chroma\|int\|16}}
	::''U'' & ''V'' (chroma) lower ~~clamping limit~~.		::''U'' & ''V'' (chroma) lower bound.

	:{{Par2\|max_chroma\|int\|240}}		:{{Par2\|max_chroma\|int\|240}}
	::''U'' & ''V'' (chroma) upper ~~clamping limit~~.		::''U'' & ''V'' (chroma) upper bound.

	:{{Par2\|show\|string\|(empty)}}		:{{Par2\|show\|string\|(empty)}}

Raffriff42: add example 7

2016-01-23T16:27:31Z

add example 7

@@ Line 161: / Line 161: @@
 |-
 |[[File:Limit_Ex06.jpg]]
 |}

Raffriff42: format ''show'' table

2016-01-23T15:39:42Z

format ''show'' table

Raffriff42: 'show

2016-01-23T15:14:32Z

'show

← Older revision		Revision as of 17:14, 23 January 2016
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	\|-		\|-
	\|		\|
	! style="text-align:left;width:12em;"\|{{FuncArg\|show}}="luma"		! style="text-align:left;width:12em;"\| {{FuncArg\|show}}="luma"
	! style="text-align:left;width:12em;"\|{{FuncArg\|show}}="luma_grey"		! style="text-align:left;width:12em;"\| {{FuncArg\|show}}="luma_grey"
	\|-		\|-
	\| ''Y''j < {{FuncArg\|min_luma}}		\| ''Y''j < {{FuncArg\|min_luma}}
	\| red (pj)		\|  {{BoldColor\|#FF0000\|120\|&diams;}} red (pj)
	\| red (pj)		\|  {{BoldColor\|#FF0000\|120\|&diams;}} red (pj)
	\|-		\|-
	\| ''Y''j > {{FuncArg\|max_luma}}		\| ''Y''j > {{FuncArg\|max_luma}}
	\| green (pj)		\|  {{BoldColor\|#00FF00\|120\|&diams;}} green (pj)
	\| green (pj)		\|  {{BoldColor\|#00FF00\|120\|&diams;}} green (pj)
	\|-		\|-
	\| ''Y''j < {{FuncArg\|min_luma}} and ''Y''k > {{FuncArg\|max_luma}}		\| ''Y''j < {{FuncArg\|min_luma}} and ''Y''k > {{FuncArg\|max_luma}}
	\| yellow (pj and pk)		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow (pj and pk)
	\| puke (pj), olive (pk)		\|  {{BoldColor\|#555501\|120\|&diams;}} puke (pj) {{BoldColor\|#A0A04A\|120\|&diams;}} olive (pk)
	\|-		\|-
	\|		\|
	! style="text-align:left;"\|{{FuncArg\|show}}="chroma"		! style="text-align:left;"\| {{FuncArg\|show}}="chroma"
	! style="text-align:left;"\|{{FuncArg\|show}}="chroma_grey"		! style="text-align:left;"\| {{FuncArg\|show}}="chroma_grey"
	\|-		\|-
	\| ''U'' < {{FuncArg\|min_chroma}}		\| ''U'' < {{FuncArg\|min_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\|-		\|-
	\| ''U'' > {{FuncArg\|max_chroma}}		\| ''U'' > {{FuncArg\|max_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| blue		\|  {{BoldColor\|#0000FF\|120\|&diams;}} blue
	\|-		\|-
	\| ''V'' < {{FuncArg\|min_chroma}}		\| ''V'' < {{FuncArg\|min_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| cyan		\|  {{BoldColor\|#00FFFF\|120\|&diams;}} cyan
	\|-		\|-
	\| ''V'' > {{FuncArg\|max_chroma}}		\| ''V'' > {{FuncArg\|max_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| red		\|  {{BoldColor\|#FF0000\|120\|&diams;}} red
	\|-		\|-
	\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' < {{FuncArg\|min_chroma}}		\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' < {{FuncArg\|min_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| green		\|  {{BoldColor\|#00FF00\|120\|&diams;}} green
	\|-		\|-
	\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' < {{FuncArg\|min_chroma}}		\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' < {{FuncArg\|min_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| teal		\|  {{BoldColor\|#008080\|120\|&diams;}} teal
	\|-		\|-
	\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' > {{FuncArg\|max_chroma}}		\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' > {{FuncArg\|max_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| orange		\|  {{BoldColor\|#FFA500\|120\|&diams;}} orange
	\|-		\|-
	\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' > {{FuncArg\|max_chroma}}		\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' > {{FuncArg\|max_chroma}}
	\| yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\| magenta		\|  {{BoldColor\|#FF00FF\|120\|&diams;}} magenta
	\|}		\|}

Raffriff42: one more touch-up

2016-01-23T14:08:10Z

one more touch-up

← Older revision		Revision as of 16:08, 23 January 2016
Line 1:		Line 1:
	The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" ~~this range~~ according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>		The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. This is the normal luminance range. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" these ranges according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>

	Luminance or chrominance values outside ~~this range~~ are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.		Luminance or chrominance values outside their ranges are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.

	'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.		'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.

Raffriff42: one more touch-up

2016-01-23T14:02:20Z

one more touch-up

← Older revision		Revision as of 16:02, 23 January 2016
Line 1:		Line 1:
	The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. For chrominance, the range is '''16''' to '''240''', ~~with the center (grey) at 128~~. "The signal may occasionally excurse beyond" this range according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>		The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" this range according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>

	Luminance or chrominance values outside this range are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.		Luminance or chrominance values outside this range are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.

			'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.
	__TOC__		__TOC__

Line 47:		Line 49:
	::*[[YV24]]: {{Serif\|j}},{{Serif\|k}}=1 (no chroma shared)		::*[[YV24]]: {{Serif\|j}},{{Serif\|k}}=1 (no chroma shared)
	::*[[YV12]]: {{Serif\|j}},{{Serif\|k}}=11,12,21,22 (chroma shared between 2x2 pixels Y11UY12V: Y21UY22V)		::*[[YV12]]: {{Serif\|j}},{{Serif\|k}}=11,12,21,22 (chroma shared between 2x2 pixels Y11UY12V: Y21UY22V)

	~~::See [[#Examples\|Examples]] below.~~

	::{\| class="wikitable"		::{\| class="wikitable"

← Older revision		Revision as of 16:08, 23 January 2016
Line 1:		Line 1:
	The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" ~~this range~~ according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>		The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. This is the normal luminance range. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" these ranges according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>

	Luminance or chrominance values outside ~~this range~~ are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.		Luminance or chrominance values outside their ranges are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.

	'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.		'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.

← Older revision		Revision as of 16:02, 23 January 2016
Line 1:		Line 1:
	The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. For chrominance, the range is '''16''' to '''240''', ~~with the center (grey) at 128~~. "The signal may occasionally excurse beyond" this range according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>		The standard known as Rec.601 or [[Wikipedia:Rec._601\|CCIR-601]] (''Studio Encoding Parameters of Digital Television...'') defines standard quantization levels: for luminance, black is '''16''' and peak white is '''235'''. For chrominance, the range is '''16''' to '''240''', or 128±112. "The signal may occasionally excurse beyond" this range according to Rec.601.<sup>[http://www.itu.int/rec/R-REC-BT.601/ BT.601-7] (Annex 1, Table 3)</sup>

	Luminance or chrominance values outside this range are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.		Luminance or chrominance values outside this range are [http://forum.doom9.org/showthread.php?p=1108323#post1108323 known to cause problems with some TV sets], so '''Limiter''' was created to ''clip'' them (or [[Talk:Levels#Clamping_vs._Clipping\|''clamp'']] them - both terms are used) to the ranges [{{FuncArg\|min_luma}}''', '''{{FuncArg\|max_luma}}] and [{{FuncArg\|min_chroma}}''', '''{{FuncArg\|max_chroma}}], which you may specify, but by default are the Rec.601 values listed above.

			'''Limiter''' can also colorize out-of-range pixels (with {{FuncArg\|show}}) to warn of a potential problem. See the [[#Examples\|example images]] below. Naturally, this option should not be enabled for final output.
	__TOC__		__TOC__

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	::*[[YV24]]: {{Serif\|j}},{{Serif\|k}}=1 (no chroma shared)		::*[[YV24]]: {{Serif\|j}},{{Serif\|k}}=1 (no chroma shared)
	::*[[YV12]]: {{Serif\|j}},{{Serif\|k}}=11,12,21,22 (chroma shared between 2x2 pixels Y11UY12V: Y21UY22V)		::*[[YV12]]: {{Serif\|j}},{{Serif\|k}}=11,12,21,22 (chroma shared between 2x2 pixels Y11UY12V: Y21UY22V)

	~~::See [[#Examples\|Examples]] below.~~

	::{\| class="wikitable"		::{\| class="wikitable"

← Older revision		Revision as of 17:39, 23 January 2016
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	\|-		\|-
	\| ''U'' < {{FuncArg\|min_chroma}}		\| ''U'' < {{FuncArg\|min_chroma}}
	\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow		\| rowspan="8"\| {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow		\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow
	\|-		\|-
	\| ''U'' > {{FuncArg\|max_chroma}}		\| ''U'' > {{FuncArg\|max_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#0000FF\|120\|&diams;}} blue		\|  {{BoldColor\|#0000FF\|120\|&diams;}} blue
	\|-		\|-
	\| ''V'' < {{FuncArg\|min_chroma}}		\| ''V'' < {{FuncArg\|min_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#00FFFF\|120\|&diams;}} cyan		\|  {{BoldColor\|#00FFFF\|120\|&diams;}} cyan
	\|-		\|-
	\| ''V'' > {{FuncArg\|max_chroma}}		\| ''V'' > {{FuncArg\|max_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#FF0000\|120\|&diams;}} red		\|  {{BoldColor\|#FF0000\|120\|&diams;}} red
	\|-		\|-
	\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' < {{FuncArg\|min_chroma}}		\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' < {{FuncArg\|min_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#00FF00\|120\|&diams;}} green		\|  {{BoldColor\|#00FF00\|120\|&diams;}} green
	\|-		\|-
	\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' < {{FuncArg\|min_chroma}}		\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' < {{FuncArg\|min_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#008080\|120\|&diams;}} teal		\|  {{BoldColor\|#008080\|120\|&diams;}} teal
	\|-		\|-
	\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' > {{FuncArg\|max_chroma}}		\| ''U'' < {{FuncArg\|min_chroma}} and ''V'' > {{FuncArg\|max_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#FFA500\|120\|&diams;}} orange		\|  {{BoldColor\|#FFA500\|120\|&diams;}} orange
	\|-		\|-
	\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' > {{FuncArg\|max_chroma}}		\| ''U'' > {{FuncArg\|max_chroma}} and ''V'' > {{FuncArg\|max_chroma}}
	~~\|  {{BoldColor\|#FFFF00\|120\|&diams;}} yellow~~
	\|  {{BoldColor\|#FF00FF\|120\|&diams;}} magenta		\|  {{BoldColor\|#FF00FF\|120\|&diams;}} magenta
	\|}		\|}