Adobe photoshop elements User Manual

CHAPTER 9

Filters in the Other submenu let you create your 
own filter effects, use filters to modify masks, offset 
a selection within an image, and make quick color 
adjustments.

Lets 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. 

Choose Filter > Other > Custom, or use the 

Filters palette to apply the Custom filter. 

Select the center text box, which represents the 

pixel being evaluated. Enter the value by which 
you want to multiply that pixel’s brightness value, 
from –999 to +999.

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. 

Repeat steps 2 and 3 for all pixels to include in 

the operation. You don’t have to enter values in all 
the text boxes.

For Scale, enter the value by which to divide the 

sum of the brightness values of the pixels included 
in the calculation. 

For Offset, enter the value to be added to the 

result of the scale calculation. 

Click OK. The custom filter is applied to each 

pixel in the image, one at a time. 

Use the Save and Load buttons to save and reuse 
custom filters. 

Creates a custom dither pattern for a 

selected RGB color. (See “Creating and applying 
custom dither patterns” on page 237.)

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. 

It is helpful to apply the High Pass filter to a 
continuous-tone image before using Image > 
Adjustment > Threshold or converting the image 
to Bitmap mode. The filter is useful for extracting 
line art and large black-and-white areas from 
scanned images.

Are useful for modifying 

masks. The Minimum filter has the effect of 
applying a spread—spreading out black areas and 
shrinking white areas. The Maximum filter has the 
effect of applying a choke—spreading out white 
areas and choking in black areas. Like the Median 
filter, the Maximum and Minimum filters look at