I really need help with eliminating noise

graysonsoldahl

Forums Newbie

Posts: 3

I really need help with eliminating noise

« on: July 17, 2014, 09:59:42 AM »

Hi! I was hoping for my first post to be an image, but I need help getting there.

I'm having the hardest time getting my image to be clean.

I've read the tutorials I could find and watched some videos, but I still can't eliminate the noise.

I really like this fractal and want it to be my first mandelbulb 3d portfolio piece, which means I want to render it at 15000 x 9000.

I haven't bothered since I can't even get rid of the noise at 600 x 360!

I'm currently trying DE 1, RM 0.02, SL 0.01, SC 16, SN 8, normals on de is not checked, and first step random is.

I'm really not sure what to do.


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taurus

Fractal Supremo

Posts: 1175

Re: I really need help with eliminating noise

« Reply #1 on: July 17, 2014, 11:09:26 AM »

Best, you post the params. You know how to do?


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graysonsoldahl

Forums Newbie

Posts: 3

Re: I really need help with eliminating noise

« Reply #2 on: July 17, 2014, 11:21:04 AM »

Mandelbulb3Dv18{
g....UZ....O/...w....2U...EE.hQx2nsxzuHxaEjW.JzjVWh1U2CxFynd1f89FYAZzOVcxnGYORzj
................................s32lczY0n/2........Y./..................y.2...wD
...Uz6.....3.....M.2/.....UGU...J0....E4.....ggT5GNJxViD/.........Uy/dkpXm1.BnAH
z.U0LD8D12../..........wz.................................U0.....y1...sD...../..
.zX0LD0Dg5fAIP8TcvXRZZBdbBFTyKiPvkdvw5cjDGFBm3Br4u1fbTDTJUVsyUZ6V.Pjz/iDeRFpzKxx
PtHlkI6dI/6syS06tOMPM6iDU.....on3.............sD.6....sD..G.....................
.............oAnAt1...sD....zw1.........................................G....k1.
.....Ksulz1.....63kz.wzzz1ER.Q6.6/...M2....9....m....I2....F....6/...Y21....SF52
...U.q19QyjS35zzjcVVzHrdS16.o6nzpvjq............6...........uN6sL6pxz0.7NwDsOWD.
.oRaqWXXzz1.0PJWp1Puz............ElFz5ou70..HsF6LWuyzu/0/XcEjV.E.........../22Yy
a1AO..U4mM1.B6tD.8m9wH4wGy9.1lxD7zpxzK./rkzS6qD..Y0QlhliUy18H6ogiRFcz0kNKpAXXPzj
/EU0.wzzz1...................................MfqF1.qib9ve4Ge7PB.EI3QBf7Gqpsm.2F5
jNW3ZFLOM1EEWsZ7GtbTaB9.yE/IH.bTU08c..2E./2ly/8cU0.E./2EMw5cU08../2E.lqTU08c..2E
./2kz/8cU0.E./2E...cU08czz/cU08cyz1cU08cxz3cU08c................................
E....6E.F2E.....2....A....EEh3aSdtqNU6oPs/EN..........................k/9.......
...................1./........xDaNaNaNaNaz1.....................................
................................................................................
.....................2.....3....6....2IPVdLOiR46HJbQa/..........................
.Q..4MU/.6..1AU..............UzD........Uz1........wz........E/E........I.2.....
...3./..................kz1.....................................................
................................}
{Titel: maybe23}

like that?


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taurus

Fractal Supremo

Posts: 1175

Re: I really need help with eliminating noise

« Reply #3 on: July 17, 2014, 09:27:39 PM »

I assume, the main problem in this parameter isn't noise - I don't see noise at all - it is aliasing ( the stairieness within the "side-pillows" and elsewhere). Noise means some grainieness. The aliasing seems to be a property of the used formula combination. You can reduce this by antialiasing a downscaled bigger render. The max useful ratio here is 1:3. I attached a parameter with increased raystep and stepwith values, that should do and a 1:3 scaling for a destination res of 960 x 576. Hope that helps.

Code:

Mandelbulb3Dv18{
g.....o0...k4...w....2U...EE.hQx2nsxzuHxaEjW.JzjVWh1U2CxFynd1f89FYAZzOVcxnGYORzj
................................s32lczY0n/2........Y./..................y.2...wD
...Uz6....EE/....MU0/.....E61...J0....E4.....wjD4jTQcFgD/.......0/U31dkpXm1.Z7QR
./EnAnYD12..1..........wz.................................U0.....y1...sD...../..
.zHnAngDg5fAIP8TcvXRZZBdbBFTyKiPvkdvw5cjDGFBm3Br4u1fbTDTJUVsyUZ6V.Pjz/iDeRFpzKxx
PtHlkI6dI/6syS06tOMPM6iDU.....oU2.............sD.6....sD..G.....................
.............oAnAt1...sD....zw1.........................................G....k1.
.....Ksulz1.....63kz.wzzz1ER.Q6.6/...M2....9....m....I2....F....6/...Y21....SF52
...U.q19QyjS35zzjcVVzHrdS16.o6nzpvjq............6...........uN6sL6pxz0.7NwDsOWD.
.oRaqWXXzz1.0PJWp1Puz............ElFz5ou70..HsF6LWuyzu/0/XcEjV.E.........../22Yy
a1AO..U4mM1.B6tD.8m9wH4wGy9.1lxD7zpxzK./rkzS6qD..Y0QlhliUy18H6ogiRFcz0kNKpAXXPzj
/EU0.wzzz1...................................MfqF1.qib9ve4Ge7PB.EI3QBf7Gqpsm.2F5
jNW3ZFLOM1EEWsZ7GtbTaB9.yE/IH.bTU08c..2E./2ly/8cU0.E./2EMw5cU08../2E.lqTU08c..2E
./2kz/8cU0.E./2E...cU08czz/cU08cyz1cU08cxz3cU08c................................
E....6E.F2E.....2....A....EEh3aSdtqNU6oPs/EN..........................k/9.......
...................1./........xDaNaNaNaNaz1.....................................
................................................................................
.....................2.....3....6....2IPVdLOiR46HJbQa/..........................
.Q..4MU/.6...................UzD........Uz1........wz........E/E........I.2.....
...3./..................kz1.....................................................
................................}
{Titel: maybe23}


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when life offers you a lemon, get yourself some salt and tequila!

graysonsoldahl

Forums Newbie

Posts: 3

Re: I really need help with eliminating noise

« Reply #4 on: July 17, 2014, 11:11:07 PM »

Thanks it does help me understand what's going on.

Unfortunately it still doesn't look clean but if that's just the way the formula is there's nothing I can do about it.


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JohnVV

Conqueror

Posts: 123

having fun

Re: I really need help with eliminating noise

« Reply #5 on: July 20, 2014, 04:08:51 AM »

There is always " post processing "

i like to use G'Mic for that
it used to be called "GREYCstoration"
it uses a heat flow PDE to process the image

http://gmic.sourceforge.net/

the shell terminal version handles 32bit floating point images
or any of these data formats
{ bool | uchar | char | ushort | short | uint | int | ulong | long | float | double }

it is part of CImg.h
http://cimg.sourceforge.net/


« Last Edit: July 20, 2014, 04:11:56 AM by JohnVV »	Logged

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