I tried stacking two pictures in Photoshop to create a final image with less noise. But I ended up with a pic that had more. Is there any other way to stack two pictures so that there is less noise?

Can I stack two pictures in Lightroom instead of Photoshop?

  • \$\begingroup\$ Is your goal to reduce noise, or is it to do something else, but you are noticing that in the process of doing that, you are getting increased noise? \$\endgroup\$
    – mattdm
    Commented Mar 31, 2015 at 18:07
  • \$\begingroup\$ I want to stich two pics with reduced noise ... but when I stich there is an increase in noise ! How do I deal with it ? @mattdm \$\endgroup\$ Commented Mar 31, 2015 at 18:32
  • 1
    \$\begingroup\$ Stacking images would normaly reduce noise, but if you use the wrong method it could increase the noise. What method are you using? \$\endgroup\$
    – Guffa
    Commented Mar 31, 2015 at 19:40
  • \$\begingroup\$ Placing one image on the other , then using blending options . @Guffa \$\endgroup\$ Commented Mar 31, 2015 at 19:53

2 Answers 2


You can also use an median blending (create image stack and apply the "Median" stack mode)

  • File > Scripts > Load Files into Stack
  • Select all layers and use Edit > Auto Align to align them (if necessary)
  • Layer > Smart Objects > Convert to Smart Object
  • Layer > Smart Objects > Stack Mode and choose Median

Discussion of this and other methods here:

Does median blending / image stacking result in better or worse results than a long exposure?


When you stack images for the purpose of noise reduction, you shouldn't use blending.

Use opacity to mix the layers to get the average:

Layer 1   50%
Layer 2  100%

For more layers you use an opacity of 1/3, 1/4, 1/5 etc.:

Layer 1   20%
Layer 2   25%
Layer 3   33%
Layer 4   50%
Layer 5  100%

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