 • May 22, 2022, 11:40:36 AM

### Author Topic:  Parameter Adjustment - Art or Luck?  (Read 498 times)

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#### dankje ##### Parameter Adjustment - Art or Luck?
« on: March 22, 2022, 06:33:13 AM »
I had seen these nice loopy arc lines in other members' images, like @Alef's kaliset_HEARTS_tweaked_singleformula2.jpg which he submitted in our March-2022 Themed Contest.  But this is the first time I've seen it with my sw.  And I didn't add anything new, it just took me months to stumble onto it.

I often find the good stuff after lengthy searching, not finding anything, and then switching palettes.  Yahtzee!

Fractal fn: f(z) = z^2 +c;
Index fn: index = ((double)iter - (logZ/logEsc - 1.0)/(power-1.0))/100.0;
Transfer fn: index = abs(sin(index));
Coloring fn: Harmonic

I found that for the effect to happen both gradient color values need to fall within rather small ranges.  Also, I have 7 coloring fn's (Geometric, Arithmetic, Quadratic, etc.) but only Harmonic works.  This is why it took so long to find.  I wonder what other goodies are hiding in my sw, and how to find them.

Is parameter tweaking an acquired art or just random chance?

Now I have somewhere new to look for next month's contests!

#### Alef ##### Re: Parameter Adjustment - Art or Luck?
« Reply #1 on: March 22, 2022, 08:06:43 AM »
Here these must be a result of colour interpolation function for gradient with lines being where index value is close to 0 or 1.

But there are many colouring algorithms which makes lines like this.
This could be not too complicated and looks neat: https://fractalforums.org/fractal-mathematics-and-new-theories/28/entropy-mandelbrot-coloring/368

Alsou here, but different stripes:
https://commons.wikimedia.org/wiki/File:Stripe_Average_Coloring_-_Mandelbrot_set_zoom_(_wake_1over3_).png

In kaliset_HEARTS_tweaked_singleformula2.jpg lines is made by direct colouring algorithm with no changable colours involved just 3 parameters I called Log Trichrome. It have just niche use as it's hard, colours can't be mutch adjusted, but they are mutch brighter and realistic than pallete using, kind of like eletrical lights.

before calculation starts:
float factlogR = 1/(log(@baseR));
float factlogG = 1/(log(@baseG));
float factlogB = 1/(log(@baseB));

;during iteration:

cnt=cnt+1
;Log normalisation for insides => zero.
IF (cnt<100)
normaliter = sqr(cnt)
ENDIF

cabsz=cabs(z)

dataR=  abs( factlogR*log (  factlogR*log (  factlogR*log (cabsz  )  )  ) )
dataG=  abs( factlogG*log ( factlogG*log (  factlogG*log (cabsz)  )  ) )
dataB=  abs( factlogB*log (  factlogB*log (  factlogB*log (cabsz)  )  ) )

sumR= recip(dataR*normaliter +  @darkness) + sumR
sumG= recip(dataG*normaliter +  @darkness) + sumG
sumB= recip(dataB*normaliter +  @darkness) + sumB

after end of fractal calculation:
#color = rgb(resultR, resultG, resultB)

With the variables:
@baseR=1.36
@baseG=1.53
@baseB=1.48
@darkness = 5  (by default =1)

Full code:
Code: [Select]
LogTrichrome {; Direct colour method based on Fractal Explorer and NASA; colour techniques. Summs of inveversed multiple log,; algorithm by Arthur Sirotinsky and Olga Federenko. ; Colour information is generated by each channel having; different logarithm bases.; http://www.fractalforums.com/index.php?topic=11520 ; + post functions for greater variety.; + switch to use gradient, index is green channel.; 03.10.2012. + new colour mode by harmonic between gradient and direct.; So to have advantages of using gradients and direct colours.; 12.10.2012. + gradient mode with index calculated as harmonic mean between 3 chanells - smoother.; 17.10.2012. better normalisation for deeper renders.; 13.11.2012. + flag to remove unnatural blue tones in direct modes.; 14.08.2013. + triangle transfer function & more colour switches.; 28.08.2013 + Pre functions, works like orbit traps.; 30.09.2013  + 8 pre functions.;+ random noise taken from Mark Townsend's scripts.; by Edgar Malinovsky 16.04.2012.; You may redistribute this algorithm, modify, derivate or use comercialy as you wish as long as you give proper credits.; http://edo555.deviantart.com/\$DEFINE DIRECTglobal:; Calculating differences to lnfloat factlogR = recip(log(@baseR));float factlogG = recip(log(@baseG));float factlogB = recip(log(@baseB));init:float sumR= 0.0float sumG= 0.0float sumB= 0.0float resultR= 0.0float resultG= 0.0float resultB= 0.0float cabsz= 0.0float dataR= 0.0float dataG= 0.0float dataB= 0.0int cnt= 0int normaliter = 0color gradcolor=rgba(0, 0, 0, 0)float resultAlpha =0.0complex ztemp =(0,0)loop:;"trap center"ztemp=#z +@posneg;pre functions; + 1.0E-15 to avoid null value dots and not working with magnet.  IF (@prefn == 0)  ; original unmodified  cabsz= cabs( ztemp  +1.0E-15)  ELSEIF (@prefn == 1)  cabsz= cabs( real(ztemp)- imag(ztemp) +1.0E-15)  ELSEIF (@prefn == 2)  cabsz= cabs( real(ztemp)* imag(ztemp) +1.0E-15)  ELSEIF (@prefn == 3)  cabsz= cabs( real(ztemp)% (imag(ztemp) +1E-20) +1.0E-15)  ELSEIF (@prefn == 4)  cabsz= |ztemp +1.0E-15|  ; non linear  ELSEIF (@prefn == 5)  cabsz= cabs( abs(real(ztemp)*2+ imag(ztemp))+ recip(abs(ztemp)+1e-15) +1.0E-15)  ELSEIF (@prefn == 6)  cabsz= cabs( ( (real(ztemp))*2+ (imag(ztemp))/((real(ztemp))+ (imag(ztemp))+ (1.9,0.1) )  ) +1.0E-15)  ELSEIF (@prefn == 7)  cabsz= cabs( (round(ztemp) +ztemp)*0.5 +1.0E-15)  ELSEIF (@prefn == 8)  cabsz= cabs( sinh( ztemp)  +1.0E-15)  ELSEIF (@prefn == 9)  cabsz= cabs( cos( ztemp)  +1.0E-15)  ; symmetric  ELSEIF (@prefn == 10)  cabsz=cabs( sqr(imag(ztemp)) - sqrt(abs(real(ztemp))) + flip (sqr(real(ztemp)) - sqrt(abs(imag(ztemp) ))) + 1.0E-15)  ELSEIF (@prefn == 11)  cabsz= cabs(( sqr(sqr( imag(ztemp) )) + sqr(sqr( real(ztemp) )) + 1.0E-15  ) ^0.25 ) ;back to basicELSEIF (@prefn == 12)  ; realcabsz= abs(real( ztemp  +1.0E-15))ELSEIF (@prefn == 13)  ; imagcabsz= abs(imag( ztemp)  +1.0E-15);from orbit trap ELSEIF (@prefn == 14); "hyperbola"cabsz = abs(imag(ztemp) * real(ztemp) - 1+1.0E-15); from thin orbit trap of Samuel MonnierELSEIF (@prefn == 15 );sincos wavescabsz= abs( sin(real(ztemp)) + cos(real(ztemp)) + imag(ztemp) +1.0E-15 )ELSEIF (@prefn == 16 );parabolacabsz = abs( sqr(real(ztemp)) - imag(ztemp) +1.0E-15)ELSEIF (@prefn == 17 );trifoliumcabsz = abs(8/( sqr(real (ztemp) )  +4) - imag(ztemp) +1.0E-15);arlecchino, modified Mark Townsend harlequinELSEIF (@prefn == 18 );arlecchinocabsz=cabs( ztemp- 1- sqr(1.25*real(atan( real(ztemp) / (imag(ztemp)+1.0E-15 ) )) )   +1.0E-15);formulasELSEIF (@prefn == 19);Chebyshev4Axolotlcabsz =cabs(  (sqr(ztemp)*(35 * sqr(ztemp) - 30) + 3) / 8  +1.0E-15)ENDIFcnt=cnt+1;Log normalisation for insides => zero.IF (cnt<100)normaliter = sqr(cnt)ENDIF;Here goes logarithmsIF (@lgtype ==0)dataR=  abs( factlogR*log (  factlogR*log (  factlogR*log (cabsz)  )  ) )dataG=  abs( factlogG*log ( factlogG*log (  factlogG*log (cabsz)  )  ) )dataB=  abs( factlogB*log (  factlogB*log (  factlogB*log (cabsz)  )  ) )ELSEIF (@lgtype ==1)dataR=  abs( factlogR*log (  log (  factlogR*log (cabsz)  )  ) )dataG=  abs( factlogG*log (  log ( factlogG*log (cabsz)  )  ) )dataB=  abs( factlogB*log (  log (  factlogB*log (cabsz)  )  ) )ELSEIF (@lgtype ==2)dataR=  abs( factlogR*log (  factlogR*log (  factlogR*log (  factlogR*log (cabsz)  )  )  ) )dataG=  abs( factlogG*log (  factlogG*log ( factlogG*log (  factlogG*log (cabsz)  )  )  ) )dataB=  abs( factlogB*log  (  factlogB*log (  factlogB*log (  factlogB*log (cabsz)  )  )  ) )ELSEIF (@lgtype ==3)dataR=  abs( factlogR*log (  ( factlogR*log (cabsz ) )  ) )dataG=  abs( factlogG*log (  ( factlogG*log (cabsz ) )  ) )dataB=  abs( factlogB*log (  ( factlogB*log (cabsz ) )  ) )ENDIF ;summ of inverted logs sumR= recip(dataR*normaliter +  @darkness) + sumR sumG= recip(dataG*normaliter +  @darkness) + sumG sumB= recip(dataB*normaliter +  @darkness) + sumBfinal:IF (@userandom==true)sumR = abs( tanh(@hyperandom *real(#random)) +sumR)sumG = abs( tanh(@hyperandom *real(#random)) +sumG)sumB = abs( tanh(@hyperandom *real(#random)) +sumB)ENDIF;modifications of index grade values 0 to 1.IF (@postfn==0) resultR=sumR resultG=sumG resultB=sumBELSEIF (@postfn==1) resultR=sqr(sumR) resultG=sqr(sumG) resultB=sqr(sumB)ELSEIF (@postfn==2) resultR=sqrt(sumR) resultG=sqrt(sumG) resultB=sqrt(sumB)ELSEIF (@postfn==3) resultR= (  1- sumR ) resultG= (  1- sumG ) resultB= (  1- sumB )ELSEIF (@postfn==4) resultR= abs(  cos(#pi*sumR)+sumR*0.5  )resultG= abs(  cos(#pi*sumG)+sumG*0.5  )resultB= abs(  cos(#pi*sumB)+sumB*0.5  )ELSEIF (@postfn==5) resultR=abs(sumR -sqrt(sumG*sumB)*0.5) resultG=abs(sumG -sqrt(sumR*sumB)*0.5) resultB=abs(sumB -sqrt(sumR*sumG)*0.5)ELSEIF (@postfn==6) resultR=sqr(sin(#pi*sumR)) resultG=sqr(sin(#pi*sumG)) resultB=sqr(sin(#pi*sumB))ELSEIF (@postfn==7) resultR= abs( sumR -round(sumR) )resultG= abs( sumG -round(sumG) )resultB= abs( sumB -round(sumB) )ELSEIF (@postfn==8) resultR= tanh(sumR)resultG= tanh(sumG)resultB= tanh(sumB)ELSEIF (@postfn==9) resultR=(  sin((sumR) )*cos((sumG))  ) resultG=(  sin((sumG) )*cos((sumR))  ) resultB=(  sin((sumB) )*cos((sumR))  )ELSEIF (@postfn==10) resultR=((sumR)/(2+abs(sumR)))*3 resultG=((sumG)/(2+abs(sumG)))*3 resultB=((sumB)/(2+abs(sumB)))*3 ELSEIF (@postfn==11)   resultR=abs(abs(sumR*0.5-trunc(sumR*0.5))-0.5)*2  resultG=abs(abs(sumG*0.5-trunc(sumG*0.5))-0.5)*2  resultB=abs(abs(sumB*0.5-trunc(sumB*0.5))-0.5)*2ELSEIF (@postfn==12)  resultR = abs(cos(sumR))  resultG = abs(cos(sumG))  resultB = abs(cos(sumB))ELSEIF (@postfn==13)  resultR = asinh(sumR)  resultG = asinh(sumG)  resultB = asinh(sumB)ELSEIF (@postfn==14)  resultR = abs(exp(sin(sumR))-1)  resultG = abs(exp(sin(sumG))-1)  resultB = abs(exp(sin(sumB))-1)ENDIF  ; switching red and blue. IF (@switchRB==true) sumB=resultB resultB=resultR resultR=sumB  ENDIF  ; switching red and green. IF (@switchRG==true) sumB=resultG resultG=resultR resultR=sumB  ENDIF  ;colour mode: direct, using palette, or mix.IF (@palette==0)       IF (@naturalise==true)       resultB=resultB*0.8       ENDIF#color = rgb(resultR, resultG, resultB)ELSEIF (@palette==1)#color = gradient(resultG)ELSEIF (@palette==2) ;gradient is by arithmetic mean of RGB  gradcolor=gradient( (resultR+resultG+resultB)*0.333333333333333 ) ;harmonic of gradient and RGB resultR=2/(  recip (red(gradcolor))+ recip(resultR) ) resultG=2/(  recip (green(gradcolor))+ recip(resultG) ) resultB=2/(  recip (blue(gradcolor))+ recip(resultB) )        IF (@naturalise==true)       resultB=resultB*0.8       ENDIF resultAlpha=alpha(gradcolor) #color = rgba(resultR, resultG, resultB,resultAlpha)ELSEIF (@palette==3); colour mode like of Fractal Explorer.; uses pallete, but each chanell is calculated seperately.resultR=red(gradient(resultR))resultG=green(gradient(resultG))resultB=blue(gradient(resultB))resultAlpha=alpha(gradient( resultG))       IF (@naturalise==true)       resultB=resultB*0.8       ENDIF#color = rgba(resultR, resultG, resultB, resultAlpha)ELSEIF (@palette==4) ;smoother.#color=gradient(3/(recip(resultR) + recip(resultG) + recip(resultB) ) ) ENDIFdefault:title = "Log Trichrome"rating = recommendedheadingcaption = "Colour notice"text = "For Gradient change the colour mode."endheadingparam palette caption = "Colour Mode" enum= "Direct Colouring" "Gradient Based" "Mixed Harmonic" "Fractal Explorer like" "Gradient by Harmonic" default=0 hint= "Gradient Based is gradient calculated from green channel, gradient harmonic is gradient calc from mean of all channels. Mixed is harmonic mean between gradient colour (by mean of RGB) and RGB channels. Fractal Explorer like is RGB values calculated seperately from gradient. All exept direct colouring uses gradient and alpha channel."endparamparam posneg caption = "Add to pixel value" default =  (0, 0) hint = "Adding number aka trap center curves stalks around points with the opposite value. (2 and -2) And diverses + and - areas." endparam param lgtype caption = "Logarithms applied" enum = "1- Triple logarithm" "2- Smoother Triple log" "3- Quadruple logarithm" "4- Double logarithm" default = 0endparam param darkness caption="Darkness amount" default=2.5 hint="Value added before inverting logarithm. Larger value creates darker pictures."endparam param switchRB caption = "Switch Red and Blue" default=false hint= "Switch Red and Blue channels, so don't need to change log Bases."endparam param switchRG caption = "Switch Red and Green" default=false hint= "Switch Red and Green channels, so don't need to change exponent Bases."endparam param prefn caption = "Pre Function" enum = "1 None" "2 X-Y" "3 X*Y" "4 remainder of X/Y" "5 X*X+Y*Y" "6 Stalks A" "7 Stalks B" "8 Areas" "9 Sinh" "10 Cos" "11 SZA Butterfly" "12 Supermodulus 4"   "13 Real" "14 Imag" "15 Hyperbola" "16 Sincos Waves" "17 Parabola" "18 Trifolium" "19 Arlecchino" "20 Chebyshev4Axolotl" default =  0 hint= "Pre function applied before colour calculations. Changes colour pattern like orbit traps."endparam param postfn caption = "Transfer Function" enum = "1- None" "2- Square Power (darker)" "3- Square Root (lighter)" "4- Inverted" "5- Half Periodic cos" "6- Accentuate RGB" "7- Haversine" "8- Solarisation" "9- Hyperbolic Tangent" "10- SineCosineMix" "11- Sigmoid" "12- Triangle" "13- Cosine" "14- ArcSinH" "15- ExpOfSin" default =  0 hint="Changes colours. The same as UF, but applied before colour mode and have extra functions."endparamparam naturalise caption = "Naturalise Colours" visible = (@palette == 0||@palette == 2||@palette == 3) default=false hint="Removes unnatural blue tint of non-gradient methods."endparambool param userandomcaption = "Add Random noise"default = falseendparamfloat param hyperandomcaption = "Hypertangent noise"hint = "Adds a random noise to the colours. Use very small or very large values 0.1 or 50."default = 0.04visible = (@userandom==true)endparamheadingcaption = "Info"text = "Colour method based on Fractal Explorer and NASA techniques. Indexes are summs of normalised inveversed multiple logarithms of all iterated z values. 3 different log bases behaves differently, hence generate different colours. Use Switches and 'Add to pixel value', more logarithms creates more stalks, 'Add to pixel' curves stalks around oposite values (adding 1 to -1 is 0), and post function changing tone. log Bases are for good in math. Colour Mode allows to switch between direct, gradient based and mixed direct and gradient by harmonic mean, Fractal Explorer like and gradient by harmonic mean modes. www.fractalforums.com"endheadingparam baseR caption = "Red log Base" default = 1.35 hint="Logarithmic base for a red channel. Colours are generated by each channel having different logs."endparamparam baseG caption = "Green log Base" default = 1.55endparamparam baseB caption = "Blue log Base" default = 1.65endparamheadingcaption = "Colours"text = "Colour Mode is incompatible with flag 'use gradient' of earlyer versions. Old parameters could require setting colour mode to direct or gradient. All modes exept direct colouring uses gradient and alpha channel."endheading}
« Last Edit: March 22, 2022, 11:57:04 AM by Alef »
by Edgar Malinovsky aka Edgars Malinovskis.

#### ottomagus ##### Re: Parameter Adjustment - Art or Luck?
« Reply #2 on: March 22, 2022, 11:35:37 AM »
Quote
Is parameter tweaking an acquired art or just random chance?

Both #### marcm200 ##### Re: Parameter Adjustment - Art or Luck?
« Reply #3 on: March 22, 2022, 03:59:47 PM »
From my own experience with monocritical polynomials and Lyapunov diagrams, all my images I found purely by chance.

For z^2+c e.g. as long as you're in the same hyperbolic component, the shape changes only in the sense, that a fat spiral might become thinner, but the number of arms stays constant. If you move the c value out of that component into another - and if this 2nd component is not directly attached to the first, then, I'm not aware of a direct way of telling what it would look like there.

Usually I perform a parameter walk just computing black and white escape images with periodicity. Then for  the interesting shapes/periods I apply a color walk with some gradients that looked fine in previous images. But that's more or less guessing.

If you want to turn more into the constructing-an-image from a vision you have, you might try two articles:

#### The Team

• Global Moderator
• Fractal Fanatic
•       • • Posts: 29 ##### Re: Parameter Adjustment - Art or Luck?
« Reply #4 on: March 23, 2022, 12:48:15 AM »
Agree @ottomagus

For those with no math skills and no understanding of a given program then at first it's just luck if you get something that looks good, but after playing with them and gaining some understanding of what's going on under the hood it becomes very easy to make nice images ... art, on the other hand, is totally subjective. A commercial artist (friend) thinks that making images with fractal programs is the same as a 2 year old with their first box of crayons, while others are rendered speechless and stare in awe at an image for some time.

Like any "art" the better you know your tools the better the result.

The Team at FractalForums

#### dankje ##### Re: Parameter Adjustment - Art or Luck?
« Reply #5 on: March 23, 2022, 06:15:56 AM »
Thanks for the code Alef.  I think I understand it well enough to implement in my little program.

I have just now completed ALL of Fractalbrot's basic functionality and am looking forward to adding more coloring schemes.  I had put off this last part for months, so it's great to be finally past it. It was for saving a list of interesting regions' parameters to disk.  Now I can do my fractal diving via laptop/reclining-chair and then load the image parameters on my bigger desktop later.  The images I submit to our contests will now be bigger. #### dankje ##### Re: Parameter Adjustment - Art or Luck?
« Reply #6 on: March 29, 2022, 07:31:45 AM »
Yes I see what you mean Alef.  I have found other colors that give similar results using other gradient functions.  It appears that I am just now learning how to set parameters.

I was feeling quite satisfied with the state of my code lately.  Then I downloaded Mandelbulb 3D and looked at its User Interface.  Honestly, I had the best laugh at my poor app.  But my enthusiasm for it continues unabated.  I look forward to adding more functions and palettes, with the help of the good people at FFs!

#### Alef ##### Re: Parameter Adjustment - Art or Luck?
« Reply #7 on: March 29, 2022, 08:42:29 AM »
Some save as -> larger file -> 1/2 the size in any image editor (works as AntiAliasing). And the image would be not less in quality as best works here.

Mandelbulb 3D user interface is prety plain, that is not bad (ipad interfaces are bad on PC), but alsou with many options under the same button and navi-gation that don't works unless you flag 'fixed zoom and steps'. Alsou most of good fractal programs had been developed for many years. Just don't download Ultra Fractal.
« Last Edit: March 29, 2022, 08:52:42 AM by Alef »

#### dankje ##### Re: Parameter Adjustment - Art or Luck?
« Reply #8 on: May 07, 2022, 07:45:27 AM »

after end of fractal calculation:
#color = rgb(resultR, resultG, resultB)

I am stuck.

resultR, resultG, resultB are floating point, but I need them to be integers [0 to 255] in order to convert them into a color.  I checked their values in the debugger and they seem to be [0.0 to 1.0] so I tried to just multiply by 255, but it didn't work.  What did I miss?

#### Adam Majewski

• Fractal Frankfurter
• • Posts: 641 ##### Re: Parameter Adjustment - Art or Luck?
« Reply #9 on: May 07, 2022, 08:38:39 AM »

#### Adam Majewski

• Fractal Frankfurter
• • Posts: 641 ##### Re: Parameter Adjustment - Art or Luck?
« Reply #10 on: May 07, 2022, 08:39:45 AM »

#### dankje ##### Re: Parameter Adjustment - Art or Luck?
« Reply #11 on: May 07, 2022, 09:41:30 AM »
I'm sorry Adam, I'm only a beginner and don't know how to supply the parameters for the images that I find with my software.  I see other people attach big blocks of alphanumeric chars to their images, but honestly I have no idea what they mean.  All I can offer is that I used this index function:
index = ((double)iter - (logZ/logEsc - 1.0)/(power-1.0))/100.0;
index = abs(sin(index));
Attached is a different version of the image.

But my question is about the LogTrichrome algorithm that Alef posted in this thread.  I am trying to incorporate it into my program and got stuck.  I am also new to forums, should I have started a new thread?

So much to learn, and it's all fun.  I just hope not to exhaust anybody's patience.  Occasionally, the answers I get from people go over my head and I feel I've wasted their time.

#### 3DickUlus

• 3f
•       • • Posts: 2935 ##### Re: Parameter Adjustment - Art or Luck?
« Reply #12 on: May 07, 2022, 09:34:59 PM »
Parameters would consist of...

Formula eg: Zn+1 = Zn2 + C
X,Y centre of image
Number of iterations
Zoom factor

...all of the colour stuff is usually unique to a given program but all must have at least the above "settings" accessible somehow
Fragmentarium is not a toy, it is a very versatile tool that can be used to make toys #### Alef ##### Re: Parameter Adjustment - Art or Luck?
« Reply #13 on: May 07, 2022, 09:54:54 PM »
I am stuck.

resultR, resultG, resultB are floating point, but I need them to be integers [0 to 255] in order to convert them into a color.  I checked their values in the debugger and they seem to be [0.0 to 1.0] so I tried to just multiply by 255, but it didn't work.  What did I miss?
It is easy.
round() or alsou ceil() floor() or trunk() could make float into an integer. Of corse after a multiplication. So that 25.000000000001 becomes 25.
Kind of like:
integer: int_resultR = round (255 * resultR);

#### dankje ##### Re: Parameter Adjustment - Art or Luck?
« Reply #14 on: May 07, 2022, 11:59:11 PM »
So my guess was correct. I cast the float to int, which is the same as truncation.

int color = 0xff000000 + ((int)(sumR * 255.0) << 16) + ((int)(sumG * 255.0) << 8 ) + (int)(sumB * 255.0);

My problem must lie elsewhere in the code.  Time to go bug hunting.  Thanks, Edgar.

Also, I will add the capability to save parameters and post them along with my images.  Thanks Adam and 3Dickulus.

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