User Guide

Chapter 5: Painting And Image Editing
To isolate images with the High Pass filter:
1. With an image in edit mode, choose Image | Select | All. Then choose Edit | Copy.
2. Choose Image | Show Channels.
3. Create a new alpha channel by clicking the button in the lower-left corner of the Channels
palette.
4. Select the new alpha channel and choose Edit | Paste.
5. Choose Image | Filter | Other | High Pass and enter a radius value. Click OK.
6. Choose Image | Adjust | Threshold. Adjust the threshold until you outline the areas you
want. Click OK.
7. Paint areas white to include them in the selection. Fill the rest of the image with black.
8. Click the composite channel. Choose Image | Select | Load to load the alpha channel and
select an area.
9. In the example, the final image was finished by choosing Image | Select | Load with Inverse
selected.
10. Then, choose Image | Filter | Blur | Gaussian Blur to apply a Gaussian blur of 3.0 pixels.
Original Image High Pass filter Threshold filter
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