HI all,
There may be some confusion here. Cosmetic Correction is a kernel filter that is run on data after they are calibrated with biases, darks, and flats. Cosmetic Correction (basically a hot pixel filter as well can have potential uses for column defects) is not connected to darks in the sense of calibration, scaling, etc. I do demonstrate it is possible to scale darks- which has some benefits regarding maintaining a dark library for a cooled CCD camera- but it comes with some pitfalls that deal with hotpixels and occasional scaling errors through dark frame optimization. It is almost always better to subtract a dark of the same duration if you have a high quality master in hand.
This is a subtle connect between dark frames and Cosmetic Correction in that one of the methods of using Cosmetic Correction is to use a dark frame to generate a hotpixel map. But again, this isn't related to the calibration process.
Feel free to connect with me through my website at AdamBlockStudios.com if this particular issue is confusing.
Thanks,
Adam