AmjadSONY: add avs+ mod

2025-11-30T18:53:48Z

add avs+ mod

Reel.Deal: crt_display v1.0

2021-07-24T02:03:05Z

crt_display v1.0

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{{FilterCat4|External_filters|Scripts|Adjustment_filters|Effects}}
{{Filter3
|1={{Author/cretindesalpes}}
|2=v1.0
|3=[http://ldesoras.free.fr/src/avs/crt-display-1.0.zip crt-display-1.0.zip]
|4=Effects
|5=
|6=[https://forum.doom9.org/showthread.php?t=170732 Doom9 Thread]}}
 
== Description ==
[[crt_display]] is a function that emulates a CRT display using aperture grille (Trinitron) or Cromaclear technologies. It is slow but gives interesting results. It implements various features like:

*Works at any (non-integer) upscaling factor
*Various ways of adjusting the scanline thickness and beam shape
*Low-pass filtering of the input signal
*Specific gamma target
*Beam glow
*Optional colored phosphor effect and shadow mask
*Colors shift caused by beam misalignment
*Automatic contrast adjustment
*Halation
*Very large upscale is possible, showing the grid of phosphors.

 
== Requirements==
* [x86] [[AviSynth+]] or [http://sourceforge.net/projects/avisynth2/ AviSynth 2.6.0] or greater
* [x64] [[AviSynth+]]
* Supported color formats: [[RGB24]], [[RGB32]]
* [[FAQ_different_types_content#How_do_I_recognize_progressive.2C_interlaced.2C_telecined.2C_hybrid_and_blended_content.3F|Progressive]] input only

==== Required Plugins ====
Latest version of the following plugins are recommended unless stated otherwise. 
* [[Dither]]
 

== [[Script variables|Syntax and Parameters]] ==

'''Syntax:'''
<pre>
crt_display (clip src, float sw, float sh, float "voff", float "ppp",
\ float "cutoff", float "scandist", float "sharpv", float "sharph",
\ float "blurh", float "glowgain", float "glowh", float "glowv",
\ float "glowsens", float "contrast", float "gamma", float "softclip",
\ float "mix", float "beamshape", bool "phosphor", bool "pgrid",
\ float "vcs", float "cromaclear", float "maskpp", float "gainb",
\ float "halgain", float "halrange", string "pixel_type")
</pre>

'''Parameters:'''
<pre>
sw
Horizontal scale factor.

sh
Vertical scale factor.

voff
Vertical centering of the scanlines.
Set to 0, the scanlines are centered between two pixels. When set to
0.5, the scanline are centered exactly on a pixel. Default is pixel-
centered.
This is a sensitive setting when the scale factor is a small integer.
When sh = 3, it's recommended to set the value closer to 0 to make
centered the dark gap between the scanlines.

ppp
Number of phosphor triads per source pixel.
It is recommended to select a value that makes the phosphors aligned
with destination pixels (for example 1 phosphor triad = 2 dest pix),
in order to avoid moire patterns and beating.

cutoff
Cutoff frequency of the low-pass filter at the electronic level.
Lowering it thinners 1-pixel wide details.
Good values are between 0.8 and 1. Effect is disabled at 1.0.

scandist
Relative distance between two scanlines.

sharpv
Vertical sharpness of the scanlines.
High sharpness makes the lines look thinner especially at low
luminance and may reduce the overall contrast.
Low sharpness thickens the lines and make them slightly blend.
Use values between 0.5 and 2.0.

sharph
Horizontal beam focus.
Use values between 0.5 and 2.0.

blurh
Amount of horizontal bluring to apply after the final resizing.
Requires phosphor to be set. Set it to 0 to disable bluring.
Sometimes with medium scale factors, when the individual phosphors
have a size close to a single destination pixel, the display becomes
incredibly messy. Blurring in the horizontal direction make the
neighbour phophors slightly merge and reduce the gird artefacts.
Moreover, it alows to amplify more the contrast with reduced
color artefacts.
Usually, values in range 1.0-2.0 give good results.
The sweet spot can be very narrow, don't hesitate to try steps
as small as 0.1. It's also very dependent from other settings,
adjust it after other parameters have changed.

glowgain
Amount of glow left by the beam.
Disabled when set to 0.

glowh
Width of the beam glow, in phosphor triads.

glowv
Height in scanlines of the beam glow.

glowsens
Glow sensitivity to light.
With 1 the glow is uniform. Greater values will leave the dark spots
intact and only make the bright spots glow.

contrast
Manual contrast amplification. The neutral value is 1.
The value of 3 is generally good when the scaling factor is not high
and the individual phosphors overlap. Use a slightly greater value
when cromaclear is enable (should be 4).
Contrast loss caused by thin scanlines or large phosphors is hard to
recover.
When unspecified, the contrast is set as high as possible depending
on the other parameters.

gamma
Gamma of the emulated monitor. Typically 2.4 to 2.8 for CRT monitors.
Default is the sRGB gamma (2.2).

softclip
Gently saturates the pixel values.
Generally in range 0-1. Slightly reduces the overall contrast when
pixel values are not clipping.
Set to 0 for hard-clipping.

mix
Amount of CRT-emulated picture in the result. Does not bypass the
gamma processing.

beamshape
Another way to sharpen the scanlines. The higher the value, the
thinner the beam. Use values between 1 and 3. This gives control on
the thickness of the beam at high luminance.

phosphor
Enable phosphor processing.

pgrid
Enables the black grid enclosing each phosphor, at the price of a
higher calculation cost. Useful only for large scale factors, when
individual phosphors are clearly visible.
Requires phosphor processing.

vcs
Vertical color shift in scanline units, misaligning the red and blue
beams.
Realistic values are between -0.25 and +0.25. When set to 0, the beams
are correctly aligned.

cromaclear
Implements the NEC's cromaclear variant of the aperture grille,
combining it with a shadow mask. The value gives the amount of
horizontal black grid to be mixed.
May reduce the contrast.

maskpp
Number of cromaclear units per scanline. Same as ppp but vertically.

gainb
Manual contrast gain for the blue.
For some reasons, the phosphor mix may generate a yellow tint in the
high luminance ranges, depending on various parameters.
Values ranging from 1.05 to 1.2 are generally enough to fix it without
creating excessive blue tint in the darker colors.
Use a test pattern to adjust the value.

halgain
Amount of halation.
Keep it to a low value, typically in range 0.01-0.05.
Disable it with 0.

halrange
Halation radius, in phosphor triad units.

pixel_type
Final RGB format. "RGB24" or "RGB32".
</pre>
 

== Examples ==
See examples in the Doom9 discussion thread.
 
 
== Changelog ==
Version Date Changes 
v1.0 2014/06/05 - Initial release
 
==External Links ==
*[https://forum.doom9.org/showthread.php?t=170732 Doom9 Forum] - crt_display discussion.
 
 
-----------------------------------------------
'''Back to [[External_filters#Effects|External Filters]] ←'''

@@ Line 3: / Line 3: @@
 |1={{Author/cretindesalpes}}
 |2=v1.0
-|3=[http://ldesoras.free.fr/src/avs/crt-display-1.0.zip crt-display-1.0.zip]
+|3=[http://ldesoras.free.fr/src/avs/crt-display-1.0.zip crt-display-1.0.zip] or avs+ only mod [[Media:Crt_display.avsi‎|Crt_display.avsi]]
 |4=Effects
 |5=

Crt display - Revision history

AmjadSONY: add avs+ mod

Reel.Deal: crt_display v1.0