Author Topic: My DSLR Workflow  (Read 3360 times)

Offline Torsinadoc

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My DSLR Workflow
« on: 2013 October 27 09:00:04 »
Using unmod Canon T3i.

Thoughts on the below workflow?  I am having problems recombining the Lum and RGB file

Stack (BPP) in PI with flats, bias, dark and lights. Image is debayered.
STF
Crop artifacts
Extract luminance from image with CIE_Y

Then use Luminosity:

Dynamic Background Extraction (or Automatic Background Extraction)
PSF
Star Mask
Deconvolution
Histogram Transformation
HDRMultiscaleTransform (Wavelets)
TGV Denoise or ACDNR (cant decide which)
Canon Banding tool
Histogram Transformation
 then save file for combining with RGB/main image

RGB


Dynamic Background Extraction
Background Neutral
Colourcalib
SCNR
Histogram Transformation
HDRMultiform
Denoise (TGV or ACDNR)
Histogram Transformation
Curves (saturation)

L and RGB

LRGB Combine (this is where is goes to heck). Just seems to give me a dark image with some red.
Crop
Curves

Am I doing to many steps for DSLR??  Sure seems like alot and not sure why I cant recombine the images under LRGB

Offline pfile

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Re: My DSLR Workflow
« Reply #1 on: 2013 October 27 13:06:31 »
that looks okay to me. you probably don't have to do the HDR transform on the RGB data.

but you don't need to save the L file to do the LRGB combine. that confuses me a little bit because i thought LRGB combine could only operate on views, not on files.

one way to use LRGBCombination is to put only the name of the L image into the process and then apply the process to the RGB image. you might try that.

rob

Offline pfile

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Re: My DSLR Workflow
« Reply #2 on: 2013 October 27 13:07:05 »
oh, also make sure there is no mask applied to the RGB image when you do the LRGBCombination.

Offline oldwexi

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Re: My DSLR Workflow
« Reply #3 on: 2013 October 27 13:20:52 »
Hi,
In your case,  Y is part of the XYZ Colorspace. You should not mix it with RGB by using LRGB.
So you either work in the CIE XYZ Colorspace or in the RGB Colorspace.
Extracting L from L*a*b  or L*c*h gives the right L for later LRGB combining.
 
I would recommend to do the linear processes on the RGB Image. (DBE, BgdN, ColCal, PSF, Deconv
than do the L extract. etc...
Using linear RGBWS (1,1,1,1)  is also recommended if you are familiar with this process.

Gerald

Offline pfile

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Re: My DSLR Workflow
« Reply #4 on: 2013 October 27 14:10:10 »
nice catch, i missed the Y extraction!

by RGBWS gerald means the "RGBWorkingSpace" process, and setting the R,G,B weights to 1 as well as gamma to 1, then applying this to the RGB image, before extraction of L*.

the problem with doing Deconvolution on the RGB image is that (in my experience anyway) i find that the focus is never consistent between R, G and B due to the effects of chromatic aberration. therefore the PSF of each channel is different, and trying to deconvolve the RGB with a single PSF usually leads to stronger ringing in one channel that can not be corrected properly simultaneously with the other channels. so i usually extract the L* and deconvolve that.

rob

Offline Torsinadoc

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Re: My DSLR Workflow
« Reply #5 on: 2013 October 27 14:53:07 »
Thanks.  I will try it out.  Ill try the decon for the RGB and see how it turns out.  I seem to have issues with decon for some reason. Never really happy with how it turns out.

New WF
STF
Dynamic Crop
Dynamic Background Extraction (or Automatic Background Extraction)
Background Neutral
Colour Calib
RGBWorkingSpace
Extract L by Extracting L from L*a*b  or L*c*h 

Lum:
PSF
Star Mask
Deconvolution
Histogram Transformation
HDRMultiscaleTransform (Wavelets)
TGV Denoise or ACDNR (cant decide which)
Canon Banding tool
Histogram Transformation
 

RGB

SCNR
Histogram Transformation
Denoise (TGV or ACDNR)
Histogram Transformation
Curves (saturation)

L and RGB

LRGB  Combine
Crop
Curves