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Noise Reduction between image captures


Jeffhotep

Question

I've just updated to v. 3.1.4 and found that unlike 3.1.3 there is now a pause for "noise reduction" between frames that runs for the same number of seconds as the capture exposure (i.e. for 60 seconds it runs for 60 seconds) before downloading the image and starting the next capture.  This happens with both dark frames and light frames.  I was running PHD and thought it might have had something to do with the issue, but it seems to happen whether PHD is on or off.

 

Is this a new feature?

 

Regards,

 

Geoff

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Now all I need is another clear night to try it!

 

 

Most all operations of BYE/BYN can be readily tested in Daytime and at one's Desk or Table by simply connecting the DSLR with a Lens Attached to the PC.  (No need for wasting a Dark Night nor any precious Imaging Time...)

If your test requires a Visual Examination of the resulting Image File, simply point the DSLR toward a darker wall or corner, lower the ISO, and raise the Aperture to f/16-f/22.

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This has not changed at all in 3.1.4.

 

You have enabled in-camera noise reduction in your camera and this is why BYE is waiting the extra 60 seconds, you need to turn if off :)

 

Regards,

Hi Guylain,

 

Dumb question but, I wondered if there is any advantage in having the noise reduction feature enabled in a Canon 550D. I am guessing not considering that I'll be subtracting the noise with the dark frames when stacking... Just asking! 

 

Many thanks,

Diego

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I wondered if there is any advantage in having the noise reduction feature enabled in a Canon 550D. I am guessing not considering that I'll be subtracting the noise with the dark frames when stacking... Just asking! 

Using In-Camera Noise Reduction (LENR) results in:

1) 50% Reduction in the number of Captured Images (since you are wasting valuable Imaging Time while the Camera performs the LENR Dark Image).

2) Lights which are ONLY "Noise Reduced" by the Hot Pixels (the Shot Noise which is removed via Stacking still remains).

3) Lights which cannot reliably be used in most Stacking routines (the Lights are already "modified" such that Stacking usually produces additional Artifacts).

4) Camera Sensor Temps are raised during the LENR Process just as if an additional Light were Captured.

5) Depending on your Scope and Setup, LENR may Suffer from Light Leaks since the Mirror Box is NOT 100% Light-Proof.

 

This is why most Experienced AP Imagers will tell you to forego the LENR and perform your Noise Reduction via the Traditional Stacking Processes.

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