When to Use CosmeticCorrection During DSLR Processing?

[jimwaters]

For 'manually' processing, aligning and stacking DSLR images when should I run CosmeticCorrection?

After ImageCalibration and before Debayer?

[RickS]

After ImageCalibration and before Debayer?

Yes, that's correct.

[John_Gill]

Hi,

With "Lights" you start with Blink ---> ImageCalibration ---> CosmeticCorrection ---> Debayer ---> SubframeSelector ---> CanonBanding(optional- can be done later in the workflow) ---> StarAlignment ---> LocalNormalization ---> ImageIntegration ---> DrizzleIntegration(only if data was generated in StarAlignment earlier)

space is not black
John

[Niall Saunders]

And, then again . . .

If you do anything that modifies the relationship between the CFA and the pixel field, wouldn't this have a detrimental effect on the DeBayered data - one that could well require a second round of cosmetic correction later in processing?

Wouldn't a  better  approach be to perform all the calibration, deBayering, registration amd rejection-based integration steps first - and then to inspect the resultant MasterLight to see if cosmetic correction would have been necessary?

I don't know the answer because I don't use a DSLR and therefore have no experience as to why DLSR images would require cosmetic correction where other OSC cameras do not (for example, I have never needed to use this process).

Perhaps the only way to answer the question would be to pre-process the same set of raw data in two different ways, and then see what the outcome is?