Custom filters let you design your own filter effect. With the Custom filter, you can change the brightness values of each pixel in the image according to a predefined mathematical operation known as convolution. Each pixel is reassigned a value based on the values of surrounding pixels. You can save the custom filters you create and use them with other Photoshop images.
Use the Save and Load buttons to save and reuse custom filters.
- Select a text box representing an adjacent pixel. Enter the value by which you want the pixel in this position multiplied.
For example, to multiply the brightness value of the pixel to the immediate right of the current pixel by 2, enter 2 in the text box to the immediate right of the center text box.
To avoid turning the image completely white or black, the sum of the values in the matrix should equal 1.
The High Pass filter retains edge details in the specified radius where sharp color transitions occur and suppresses the rest of the image. (A radius of 0.1 pixel keeps only edge pixels.) The filter removes low-frequency detail in an image and has an effect opposite to that of the Gaussian Blur filter.
You can use the High Pass filter to extract line art and large black-and-white areas from scanned images. To do so, apply the filter before using the Filter > Adjustments > Threshold command or converting the image to bitmap mode.
The Maximum and Minimum filters look at individual pixels in a selection, like the Median filter. Within a specified radius, the Maximum and Minimum filters replace the current pixel’s brightness value with the highest or lowest brightness value of the surrounding pixels. The Maximum filter has the effect of applying a choke—spreading out white areas and choking in black areas. The Minimum filter has the effect of applying a spread—spreading out black areas and shrinking white areas.
The Offset filter moves a selection a specified amount to the right horizontally or down vertically, leaving an empty space at the selection’s original location. Depending on the size of the selection, you can fill the empty area with a transparent background, with the edge pixels, or with pixels from the right or bottom edges of an image.
You can install plug‑in filters developed by non-Adobe software developers. Once installed, the plug‑in filters appear at the bottom of the Filter menu unless the developer has specified another location.
If you are interested in creating plug‑in modules, contact Adobe Systems Developer Support.
In Windows Application version of Photoshop Elements, plug-ins are not available automatically and need to be added manually.
If you have problems or questions about a third-party plug‑in, contact the plug‑in’s manufacturer for support.
Photoshop Elements automatically scans opened images for Digimarc® watermarks. If a watermark is detected, the application displays a copyright symbol in the image window’s title bar and includes the information in the Copyright Status, Copyright Notice, and Owner URL sections of the File Info dialog box.