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replace the discarded lines by duplication or interpolation.
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 filters, 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. This
operation is similar to the Add and Subtract calculations for channels.
You can save the custom filters you create and use them with other Photoshop images. See Create a Custom filter.
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 from 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 the Threshold command or converting the image to Bitmap mode.
The filter is useful for extracting line art and large black-and-white areas from scanned images.
Maximum and Minimum Are useful for modifying masks. 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. Like the
Median filter, the Maximum and Minimum filters look at individual pixels in a selection. 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.
Offset Moves a selection a specified horizontal or vertical amount, leaving an empty space at the selection’s original location. You can fill the
empty area with the current background color, with another part of the image, or with your choice of fill if the selection is near the edge of an
image.
Digimarc filters
The Digimarc filters embed a digital watermark into an image to store copyright information.
Note: Digimarc plug-ins require a 32-bit operating system. They are unsupported in 64-bit versions of Windows and Mac OS.
Vanishing Point
The Vanishing Point feature preserves correct perspective in edits of images that contain perspective planes (for instance, the sides of a building
or any rectangular object).
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