Turn any photo into a dot grid artwork with these Photoshop actions. You'll get great results with dots that change size. They get larger in brighter areas and smaller in darker areas. Free download available.
Finding the Cool and Warm ColorsThe first step towards this Photoshop effect is to identify the cool and warm colors.
Step 1Open a photo you would like to edit. Or, you may use the photo used in this tutorial (from iStockPhoto).
Step 2The Lab color mode contains a chroma A channel that identifies the cool and warm colors. To access this channel, change the color mode to Lab color (Image> Mode> Lab Color)
Step 3Now that we're editing in Lab color, we can grab the channel. But before we do this, we need to create a new layer (Layer> New> Layer or Shift+Ctrl+N) .
Step 4After creating a new layer, we'll add the chroma A channel to the layer. With the new layer selected, use the Apply Image tool (Image> Apply Image) to set the following properties:
- Layer: Merged
- Channel: a
- Invert: Unchecked
- Blending: Normal
- Opacity: 100%