Bloom

Step 1 - Preparing the Document

Open an image to edit.
Image from iStockPhoto.com

Step 2

Duplicate the layer (Layer> Duplicate Layer or Ctrl+J) and change the blending mode of the new layer to Screen.
Layer duplicated and blending mode changed to screen.
  1. Add a layer mask to the top layer (Layer> Layer Mask> Reveal All). Make sure that the layer mask is selected.
    When the layer mask is selected, there is a white outline around the thumbnail of the layer mask in the Layers pallet.

Creating the Mask

In this section, we'll be editing the layer mask to mask out the effect from the shadows.

Step 3

Use the Apply Image tool to apply the Background layer to the layer mask. To do this, open the Apply Image tool (Image> Apply Image) and change the Layer to Background and click OK.
Using the Apply Image tool.

Step 4

Hold the Alt key and click on the thumbnail of the layer mask.
The canvas should now show the contents of the layer mask.

Step 5

With the layer mask still activated, use the Threshold tool (Image> Adjustments> Threshold) and adjust the slider to define where the bloom Photoshop effect will be visible.
For this image, I moved the slider towards the left until the face of the daughter turns from black to white.

Adjusting the Effect

We're now ready to edit the effect. This section is where we'll see the bloom effect in action.

Step 6

Click on the thumbnail of the layer (not its layer mask) to deactivate the layer mask.
The canvas should now contain a color image.

Step 7

Open the Gaussian Blur filter (Filter> Blur> Gaussian Blur). Ensure that Preview is enabled and increase the radius to achieve your desired effect.
While adjusting the radius, look at the canvas to see a live preview.

Step 8

Inside the Layers pallet, click on the thumbnail of the layer mask to activate. Use the eraser tool (E) to erase the bloom Photoshop effect wherever you do not want the effect to appear. Use the brush tool (B) to add areas where you would like the effect to appear. To start, use a brush or eraser with a low hardness and an opacity of around 50%. Press the "[" and "]" keys to adjust the size of the brush quickly.
For this image, I added the bloom effect to the daughter's arms and erased some of the areas in the mothers face, hair, and shirt.
This is what the layer mask looks like after painting.

Final Results


Bloom Photoshop Tutorial
Comparison of the Diffusion and Bloom effect.
This effect creates a similar glow effect as the diffusion effect. The diffusion effect is more natural while the bloom effect is stronger and has more noticeable edges between the shadows and highlights. If you feel the Bloom effect is too strong for your photo and you want to preserve more details, try using the classic diffusion effect.
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5 comments on “Bloom”

  1. Wow, great resource. I'm gonna glean everything I can from this site, if that's alright with you all.

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