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  • Luminosity Masking allows you to create selections of specific luminance (brightness) values from Channels within an image in Photoshop, which you can then use to control that part of the image.
  • Specific Luminosity Masks can be produces for a wide range of luminance (Brightness) ranges, such that you can then select for such things as blown out highlights, blocked shadows, or increase mid time contrast.
  • Using Select Colour Range, which can also be set to select luminosity. This allows you to select visually, rather than using set values. 01,

See Also

  • HDR Photography, Masking, Blend If,

Creating Luminosity Masks

Plugins to Create Luminosity Masks


  • JM Luminance Masks (Downloaded) - Free panel to create luminosity masks at the click of a button by Jimmy MacIntyre. 01, Free Download Site,
  • To Select and mask, go to Channels and chose the appropriate one. Turn on the eye symbol. Press CMD + CLICK on the thumbnail of the Channel Mask. Go back to the black mask on the image, making sure it is visible, and the marching ants will show on the mask. Use CTRL + H to hide it if needed. Brush over the mask in white to reveal the selected areas. 01,



 Relate Luminosity Masks from Gradient Maps

How to Make Quick Luminosity Masks from Gradient Maps - Video by Nino Batista. 

Using Blend-If Instead

  • Use a layer above the image, such as Curves. Right click this later and use Blend If to only affect the layer below by using the bottom sliders. You can target selected luminosity ranges. The big advantage is that you can go back and adjust the sliders at any time, something you cannot do with luminosity masks. The disadvantage is that there is no mask to use to select out areas you wish to protect. Similarly you can not copy a mask if you want to do further adjustments. 01,
  • Luminosity Masks Versus Blend If,

 5 Tone Heat Map

  • Simplified form of luminosity mask produced by using a tone map to produce five different colours in an image based on luminosity. However, the beauty of this method is that you can then use a selective colour layer to select any of the colours in the heat map and then use a curves adjustment to just alter the one luminosity (colour) range. (Ref). More notes needed.***

Luminosity Masking

  • Luminosity Masks - 01,
  • Gavin Seim’s Lumist says it is a much easier way to do this.
  • Easy Panel 2.0 - 16 bit luminosity panel - YouTube,


  • Courses - 01,

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