Help needed, Monochrome Data
Posted: Fri Jul 05, 2019 1:20 pm
Hi there, pleased to meet you all.
I am trying to get Startools to process a simple image of M101 that I took with an Altair Hypercam 183M, using a Celestron ED80. There's not a huge amount of data, but what there is has been stacked in DSS as follows:
Yes there should be more darks, but it was late and I was tired, and this was just a test. In any case, even DSS seems able to stretch this and turn it into something worth looking at.
Here is an example stretched in DSS: https://www.dropbox.com/s/vkid21wr1hv9g ... h.png?dl=1
Here is an example stretched in Gimp: https://www.dropbox.com/s/sq6jjxgfvf6ky ... h.jpg?dl=1
However I can't get anything resembling that from StarTools, and I've been trying for hours! Autodevelop seems to bring in huge amounts of noise, developing manually doesn't seem to give me the control that I do with gimp curves or levels (e.g. bring down the middle, then bring up the black point to compensate), no matter what I do the best I can do looks like a print out on an old dot-matrix printer (those of my age will understand this!).
All of the example videos I've seen are either for colour images, barring one monochrome Ha image which was already very high quality data. This is data through a CLS filter in London (Bortle 8). Is it the case that Startools just doesn't work with monochrome data? Am I doing something badly wrong?
If someone could try taking my data and see if they can at least approximate the poorly processed examples above from DSS and Gimp, and then tell me how they did it, that would be awesome
. Here is the stacked output:
https://www.dropbox.com/s/0qzewas7pi019 ... s.FTS?dl=1
Many thanks,
-simon
I am trying to get Startools to process a simple image of M101 that I took with an Altair Hypercam 183M, using a Celestron ED80. There's not a huge amount of data, but what there is has been stacked in DSS as follows:
Code: Select all
Stacking step 1 ->5 frames (ISO: -) - total exposure: 50 mn 0 s
RGB Channels Background Calibration: No
Per Channel Background Calibration: No
Method: Median
-> No Offset -> Dark: 1 frames (ISO : -) exposure: 10 mn 0 s
-> Dark Flat: 10 frames (ISO : -) exposure: 4 s
Method:
Median
-> Flat: 10 frames (ISO: -) exposure: 4 s
Method: MedianHere is an example stretched in DSS: https://www.dropbox.com/s/vkid21wr1hv9g ... h.png?dl=1
Here is an example stretched in Gimp: https://www.dropbox.com/s/sq6jjxgfvf6ky ... h.jpg?dl=1
However I can't get anything resembling that from StarTools, and I've been trying for hours! Autodevelop seems to bring in huge amounts of noise, developing manually doesn't seem to give me the control that I do with gimp curves or levels (e.g. bring down the middle, then bring up the black point to compensate), no matter what I do the best I can do looks like a print out on an old dot-matrix printer (those of my age will understand this!).
All of the example videos I've seen are either for colour images, barring one monochrome Ha image which was already very high quality data. This is data through a CLS filter in London (Bortle 8). Is it the case that Startools just doesn't work with monochrome data? Am I doing something badly wrong?
If someone could try taking my data and see if they can at least approximate the poorly processed examples above from DSS and Gimp, and then tell me how they did it, that would be awesome
. Here is the stacked output:https://www.dropbox.com/s/0qzewas7pi019 ... s.FTS?dl=1
Many thanks,
-simon
