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ADOBE PHOTOSHOP ELEMENTS 2.0
User Guide
NTSC Colors Restricts the gamut of colors to those
acceptable for television reproduction to prevent
oversaturated colors from bleeding across
television scan lines.
Other filters
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.
Custom 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.
To apply a Custom filter effect:
1 Either choose Filter > Other > Custom, or use
the Filters palette to apply the Custom filter. (If
using the palette, select Filter Options before
applying the filter.)
2 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.
3 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.
Note: To avoid turning the image completely white
or black, the sum of the values in the matrix should
equal 1.
4 Repeat steps 2 and 3 for all pixels you want to
include in the operation. You don’t have to enter
values in all the text boxes.
5 For Scale, enter the value by which to divide the
sum of the brightness values of the pixels included
in the calculation.
6 For Offset, enter the value to be added to the
result of the scale calculation.
7 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.
High Pass 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.
This filter is useful for extracting line art and large
black-and-white areas from scanned images.
When doing so, apply the High Pass filter before
using the Image > Adjustment > Threshold
command or converting the image to Bitmap
mode.
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