A file name temperature question

[Mike]

I have a good sized library of darks. 1248 in 800 ISO alone. I have captured them all with the file name including the TemperHum data temp. I have been told that this is not an accurate way to evaluate darks as the TemperHum temperature is not necessarily representative of the sensor temperature, the critical factor in the noise that darks calibrate out. Last night I played around with my settings and ended up changing the file names to show the sensor temperature. It was eye opening. The temperatures of the light frames were pretty widely varied.

 

This has left me with a difficult decision. Do I keep the change to sensor temp, and restart my darks library, or just leave well enough alone. I’m leaning toward leaving well enough alone as, since I’ve started dithering, the noise I get in stacked images is easily processed out. So I believe I’ll go back to Temperhum temperatures.

 

This leaves a problem. I can’t seem to figure out how I changed to Sensor temperature in the file name. So my questions are How do I change back to TemperHum temperature in the file name, and is it possible to have both TemperHum temperature and Sensor temp in the file name? If so, how do I set that?

 

Thanks,

Mike

[dts350z]

Would the sensor temp be in the EXIF data in your existing darklib files such that some utility could sort or rename them with the sensor temp?

 

http://sourceforge.net/projects/darkmaster/

 

Also, you might try the following experiment:

 

Restack something  you are familiar with, where you used your existing darklib, and don't included ANY darks in the stack. Leaving out darks is one of the valaid workflows in DSS. Compare the results to what you previosuly did with darks to see if you were acutally adding noise (with darks at wrong temprature) vs. eliminating noise.

 

See: 

 

http://deepskystacker.free.fr/english/theory.htm#Calibration

 

PS you should edit your post to fix the font color

[s3igell]

I'll second DarkMaster...

It's not been updated since 2012 - abandoned by its author - but is still decently useful.  Especially if like in your situation, the Sensor Temp is only available in EXIF data, as that is where DarkMaster gets it.

 

(It's a shame that someone doesn't "adopt" this Open Source project, and give it a bit of New Life...)

[astroman133]

I believe that the <ambient> keyword in the filename template will put the TemPerHum temperature in the file name.  The <temperature> keyword is the internal "sensor" temperature.

[admin]

I believe that the <ambient> keyword in the filename template will put the TemPerHum temperature in the file name.  The <temperature> keyword is the internal "sensor" temperature.

 

This is correct

 

 

[Mike]

I believe that the <ambient> keyword in the filename template will put the TemPerHum temperature in the file name.  The <temperature> keyword is the internal "sensor" temperature.

 

Thank you, that will get me back to where I want to be.