Re: RAW Monochrome Processing Workflow


Mar 2, 2009

 


----------------------------

#35973 Mar 2, 2009

I am using a DSLR, and I'm shooting in RAW Monochrome.

I capture lights (300s), darks (300s), flats (0.5s), and bias (n/a).

All the frames are shot with the same ISO and in the same session.

I have "calibrate dark, flat, bias, and bias subtract flat" checked

(not doing dark calibration on the flats -- they're only 0.5s so not

much dark current).





My workflow is:

Process->Set Calibration->Auto-Generate

- Turn on "boxcar" for the flats, turn off "apply to all groups"

Process->Create Master Frames

Process->Stack

- make sure "Auto Calibrate" and "Auto Color Convert" are checked

- Add Files

- Right-click, do "Compute Alignment"

- Combine tab->Go

(note: the "color" tab is always grayed out -- why?)



The resulting image claims to be color, but is always grayscale (with

R~=G~=B for all pixels). It is gray to within +/- 2 in an 8-bit pixel

(ie R=100 G=101 B=100 or similar).



I'm clearly doing something wrong in my workflow; why is my color

getting eaten?



I assume it has something to do with "Auto Color Convert" and that the

fact the "color" tab is grayed out on the Stack menu is probably a

symptom.



I have tried simplifying my life down to just calibrating against

darks; same result.



Any ideas?



Best,

Jimbo

Newark, CA



----------------------------

#35975 Mar 2, 2009

Make sure you aren't binning; it removes the color information from the image.



The color tab is always grayed out because it is used for tricolor and LRGB

imaging, not for one-shot color.



Doug



---------------



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



---------------





rushwind wrote: > I am using a DSLR, and I'm shooting in RAW Monochrome.

> I capture lights (300s), darks (300s), flats (0.5s), and bias (n/a).

> All the frames are shot with the same ISO and in the same session.

> I have "calibrate dark, flat, bias, and bias subtract flat" checked

> (not doing dark calibration on the flats -- they're only 0.5s so not

> much dark current).

>

>

> My workflow is:

> Process->Set Calibration->Auto-Generate

> - Turn on "boxcar" for the flats, turn off "apply to all groups"

> Process->Create Master Frames

> Process->Stack

> - make sure "Auto Calibrate" and "Auto Color Convert" are checked

> - Add Files

> - Right-click, do "Compute Alignment"

> - Combine tab->Go

> (note: the "color" tab is always grayed out -- why?)

>

> The resulting image claims to be color, but is always grayscale (with

> R~=G~=B for all pixels). It is gray to within +/- 2 in an 8-bit pixel

> (ie R=100 G=101 B=100 or similar).

>

> I'm clearly doing something wrong in my workflow; why is my color

> getting eaten?

>

> I assume it has something to do with "Auto Color Convert" and that the

> fact the "color" tab is grayed out on the Stack menu is probably a

> symptom.

>

> I have tried simplifying my life down to just calibrating against

> darks; same result.

>

> Any ideas?

>

> Best,

> Jimbo

> Newark, CA

>

>

>

---------------

>

> Yahoo! Groups Links

>

>

>

>



--



----------------------------

#36981 May 30, 2009

Could it be a color balance issue? I know i"m having the same issues, and although I can get "color" I'm not sure that the colors are right.



I'm using a canon 50D and the camera is selected in the convert dialog, but all the color scaling values are 100.



--- In MaxImDL@yahoogroups.com, "rushwind" rushwind@...> wrote:

>

> I am using a DSLR, and I'm shooting in RAW Monochrome.

> I capture lights (300s), darks (300s), flats (0.5s), and bias (n/a).

> All the frames are shot with the same ISO and in the same session.

> I have "calibrate dark, flat, bias, and bias subtract flat" checked

> (not doing dark calibration on the flats -- they're only 0.5s so not

> much dark current).

>

>

> My workflow is:

> Process->Set Calibration->Auto-Generate

> - Turn on "boxcar" for the flats, turn off "apply to all groups"

> Process->Create Master Frames

> Process->Stack

> - make sure "Auto Calibrate" and "Auto Color Convert" are checked

> - Add Files

> - Right-click, do "Compute Alignment"

> - Combine tab->Go

> (note: the "color" tab is always grayed out -- why?)

>

> The resulting image claims to be color, but is always grayscale (with

> R~=G~=B for all pixels). It is gray to within +/- 2 in an 8-bit pixel

> (ie R=100 G=101 B=100 or similar).

>

> I'm clearly doing something wrong in my workflow; why is my color

> getting eaten?

>

> I assume it has something to do with "Auto Color Convert" and that the

> fact the "color" tab is grayed out on the Stack menu is probably a

> symptom.

>

> I have tried simplifying my life down to just calibrating against

> darks; same result.

>

> Any ideas?

>

> Best,

> Jimbo

> Newark, CA

>







----------------------------

#38398 Oct 15, 2009

Hi,



I am struggeling with the same issue and just wondered if any of you found the answer for this?



I am using a Canon 40D and my colors are eaten up. I got really frustrated with this issue and have now moved all my processing to Photoshop but having to subtract darks and do manually aligning is not so fun either but at least I get a result that is much better.



Br

Eirik





Just wondered if there was anyone that had a

--- In MaxImDL@yahoogroups.com, "Brian Sheets" brians@...> wrote:

>

> Could it be a color balance issue? I know i"m having the same issues, and although I can get "color" I'm not sure that the colors are right.

>

> I'm using a canon 50D and the camera is selected in the convert dialog, but all the color scaling values are 100.

>

>

> --- In MaxImDL@yahoogroups.com, "rushwind" rushwind@> wrote:

> >

> > I am using a DSLR, and I'm shooting in RAW Monochrome.

> > I capture lights (300s), darks (300s), flats (0.5s), and bias (n/a).

> > All the frames are shot with the same ISO and in the same session.

> > I have "calibrate dark, flat, bias, and bias subtract flat" checked

> > (not doing dark calibration on the flats -- they're only 0.5s so not

> > much dark current).

> >

> >

> > My workflow is:

> > Process->Set Calibration->Auto-Generate

> > - Turn on "boxcar" for the flats, turn off "apply to all groups"

> > Process->Create Master Frames

> > Process->Stack

> > - make sure "Auto Calibrate" and "Auto Color Convert" are checked

> > - Add Files

> > - Right-click, do "Compute Alignment"

> > - Combine tab->Go

> > (note: the "color" tab is always grayed out -- why?)

> >

> > The resulting image claims to be color, but is always grayscale (with

> > R~=G~=B for all pixels). It is gray to within +/- 2 in an 8-bit pixel

> > (ie R=100 G=101 B=100 or similar).

> >

> > I'm clearly doing something wrong in my workflow; why is my color

> > getting eaten?

> >

> > I assume it has something to do with "Auto Color Convert" and that the

> > fact the "color" tab is grayed out on the Stack menu is probably a

> > symptom.

> >

> > I have tried simplifying my life down to just calibrating against

> > darks; same result.

> >

> > Any ideas?

> >

> > Best,

> > Jimbo

> > Newark, CA

> >

>



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