Add Noise
The Add Noise filter adds a grainy texture to an image. Adding small amounts of noise can reduce the appearance of minor imperfections in the original image.
Customized settings can be saved as a preset for future use. Presets can be selected from the Presets drop-down, or saved by clicking the adjacent Save icon.
To add noise to an image:
- Select Filter | Detail | Noise from the main menu, or press N.
- Select the Add Noise tab.
- Set the options as described below.
- Do one of the following:
- Click OK to apply any changes and close the tool.
- Click Cancel to discard all changes and close the tool.
Add Noise Options
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Intensity |
Specifies the amount of noise to add to the image. A higher intensity increases the chance that a noise pixel will replace a pixel in the original image. |
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Color proximity |
Specifies the color of noise pixels to add to the image. A lower value gives each noise pixel a color similar to the pixel it replaces. Higher values result in a random selection of the noise pixel color. |
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Noise color |
Select one of the following options to specify noise pixel color:
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Noise placement |
Adds noise to image areas that closely match a defined color. Select the Set color checkbox to enable noise placement, and click the color picker to specify a color. |
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Randomize |
Indicates the random placement of noise in an image. When using the Add Noise tool, Gemstone places the noise pixels based on a random seed to make the image noise different each time the Add Noise tool is used. To generate a new random seed, click the Randomize button. |
Right-click a slider to reset to the default value.
This filter features a Pixel Targeting tab (see Pixel Targeting for more details). 
Use the Edit Brush to paint this effect onto specific areas of the image. 
Use the Gradient tool to transition this effect across specific areas of the image. 
Use the Radial Gradient tool to apply effects around, or directly to, a center point. 