None of those solutions actually produce what we're after though (some
of your solutions seem to invert the input).
We need something that can compresses the input to a 0-1 range by
offsetting and scaling based on the image's min and max values (so the
resulting range is 0-1). You can totally do this with a Grade or
Expression node and a bit of tcl or python (or the CurveTool if you want
to pre-compute), but that's not efficient.
I reckon this should be a feature built into the viewer for ease-of-use
and speed.
On 14/10/12 1:04 PM, Marten Blumen wrote:
and this group does all channels rgba,depth,motion using the
expressions. should be quite fast as an input process
set cut_paste_input [stack 0]
version 7.0 v1b74
push $cut_paste_input
Group {
name Normalised_channels
selected true
xpos -526
ypos 270
}
Input {
inputs 0
name Input1
xpos -458
ypos 189
}
Expression {
expr0 "mantissa (abs(r))"
expr1 "mantissa (abs(g))"
expr2 "mantissa (abs(b))"
channel3 depth
expr3 "mantissa (abs(z))"
name Normalized_Technical1
tile_color 0xb200ffff
label rgbz
note_font Helvetica
xpos -458
ypos 229
}
Expression {
channel0 alpha
expr0 "mantissa (abs(a))"
channel1 {forward.u -forward.v -backward.u forward.u}
expr1 "mantissa (abs(u))"
channel2 {-forward.u forward.v -backward.u forward.v}
expr2 "mantissa (abs(v))"
channel3 depth
name Normalized_Motion1
tile_color 0xb200ffff
label "a, motion u & v"
note_font Helvetica
xpos -458
ypos 270
}
Output {
name Output1
xpos -458
ypos 370
}
end_group
On 14 October 2012 11:29, Marten Blumen <[email protected]
<mailto:[email protected]>> wrote:
And one that looks technical or techni-color!
set cut_paste_input [stack 0]
version 7.0 v1b74
push $cut_paste_input
Expression {
expr0 "mantissa (abs(r))"
expr1 "mantissa (abs(g))"
expr2 "mantissa (abs(b))"
channel3 depth
expr3 "mantissa (abs(z))"
name Normalized_Technical
tile_color 0xb200ffff
label "Normalized\n"
note_font Helvetica
selected true
xpos -286
ypos -49
}
On 14 October 2012 10:46, Marten Blumen <[email protected]
<mailto:[email protected]>> wrote:
This works for rgb & depth. Pop it into the ViewerProcess for
normalized viewing. It seems to work with all values, free
polygon cube to anyone who breaks it ;)
Who knows the expression node; can we just apply the formula
to all the present channels?
set cut_paste_input [stack 0]
version 7.0 v1b74
push $cut_paste_input
Expression {
expr0 1/(r+1)/10
expr1 1/(g+1)/10
expr2 1/(b+1)/10
channel3 depth
expr3 1/(z+1)/10
name RGBDEPTH
label "Normalized\n"
note_font Helvetica
selected true
xpos -220
ypos 50
}
On 14 October 2012 10:24, Marten Blumen <[email protected]
<mailto:[email protected]>> wrote:
A normalised expression node:
set cut_paste_input [stack 0]
version 7.0 v1b74
push $cut_paste_input
Expression {
expr0 1/(r+1)/10
expr1 1/(g+1)/10
expr2 1/(b+1)/10
name Expression6
label "Normalize Me\n"
note_font Helvetica
selected true
xpos -306
ypos 83
}
On 14 October 2012 09:33, Marten Blumen <[email protected]
<mailto:[email protected]>> wrote:
+ 1
as a side note, doesn't SoftClip and Toe nodes do
dynamic normalising of the RGB channels?
set cut_paste_input [stack 0]
version 7.0 v1b74
push $cut_paste_input
SoftClip {
conversion "logarithmic compress"
softclip_min 1
name SoftClip2
selected true
xpos -1876
ypos 1428
}
Toe2 {
name Toe2
selected true
xpos -1876
ypos 1461
}
On 13 October 2012 23:51, Patrick Heinen
<[email protected]
<mailto:[email protected]>> wrote:
Yes of course I can use VIEWER_INPUT or a register
a viewer process, but that wouldn't make it
dynamic either, well maybe with the MinColor Node
but that one again doesn't work for deep data...
And starting to sample every pixel via python is
just horribly slow and you would need to bake it
after that again. Plus again the VIEWER_INPUT
doesn't work for deep data either...
It shouldn't be to complicated having one button,
that dynamically normalizes what's shown in the
Viewer, just as you have it in Fusion.
I sent in a request, Ticket#2012101310000031
Regards
Patrick
Am 13.10.2012 um 11:42 schrieb Johannes Hezer:
> +1
>
>
> Am 10/13/12 7:47 AM, schrieb Frank Rueter:
>> Same. It would indeed be very helpful. Has
somebody sent in a request yet?
>>
>>
>> On 13/10/12 6:54 AM, Holger Hummel|Celluloid
VFX wrote:
>>> yes, you can.
>>> BUT:
>>> - it needs manual work: you need to know/find
the min/max values. they change from pass to pass,
actually in most cases from frame to frame.
>>> - it's quicker when you can just click on
button to toggle this. also because it does not
conflict with some other VIWER_INPUT that might be
active.
>>>
>>> so +1 from me making this a feature request
>>>
>>> - Holger
>>>
>>>
>>> jbidwell wrote:
>>>> You can make a grade and group it, then name
it "VIEWER_INPUT". The viewer will use that grade
in the viewer whenever the IP button is active.
>>>>
>>>> - JB
>>>>
------------------------------------------------------------------------
>>>>
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>>>
>>
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