photoshop creative
Feb
13

Free Photoshop Tutorial: Correct colour and brighten low-light images

Posted in:
Tips & Tutorials, by Mark White
February 13, 2013

How to improve images taken in low light by applying Levels and advanced noise reduction techniques 

Before

After

Step 1 – Duplicate and blend

Open up an image taken in low light, and duplicate the Background layer (Cmd/Ctrl+J). Change the blend mode of this duplicate layer to Screen. This will make the image look much brighter. If it’s too bright in parts, lower the Opacity of the layer until details are brought back in the highlights.

 

 

Step 2 – Add Levels

Add a Levels adjustment from Layer>New Adjustment Layer. Change the blend mode of this layer to Luminosity before making any changes. This will now only affect the lighting and not warp the colours in the image.

 

 

 

Step 3 – Adjust lighting

Inside the Levels adjustment, move the middle marker (midtones) to the left slightly. Assess the shadow regions in your image and try and use Levels to reveal as much detail here as possible, without fading the overall image.

 

 

 

Step 4 – Reduce Noise

Press Cmd/Ctrl+Opt/Alt+Shift+E to create a merged visible layer of your image. Rename this layer ‘Reduced Noise’ and then go to the Filter menu and down to Noise>Reduce Noise.

 

 

 

Step 5 – Advanced Noise

Inside the Noise menu, click on the ‘Advanced’ box and select the Per Channel tab. Because noise (digital distortion created by the lack of image information) appears more in certain parts of an image than others, we can control it selectively.

 

 

 

 

Step 6 – Clearer image

Zoom to an area of your image where there is a shadow. Cycle through the Channels list and select one that shows the most noise – in this case its the Green and Red Channels. Increase Strength until you see an improvement, and then boost Preserve Details to bring back some definition.

 

 

 

Step 7 – Colour control

To finish with, add a Color Balance adjustment. For tungsten images the Magenta/Green slider can stay at 0. Slide the Cyan/Red to the left and Yellow/Blue to the right to colour correct your image. You may not need this final step.

  • Rob

    Good tips but I personally like the original better than the adjusted one.

  • Rob’s Mate

    I agree with Rob.

  • What about the most favorite tool for this type of problem, the time saver shadows/highlights?

  • Zoe

    You mentioned colour balancing tunsten, but which would the sliders go for warm light? I have indoor shots that still look a little yellow.