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Other filters

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Última actualización el 13 ene. 2022 | También se aplica a Photoshop Elements

Custom filters

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.

Apply a Custom filter

In the Edit workspace, select an image, layer, or area.
Choose Other > Custom from the Filter menu.
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.

Nota:

To avoid turning the image completely white or black, the sum of the values in the matrix should be equal to 1.
Repeat steps 3 and 4 for all pixels you want 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.

Nota:

You can click Save button and save the custom filter as .ACF file. Click Load to load an already saved custom filter.

High Pass

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.

Nota:

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.

Select Filter > Other > High Pass.
Adjust the radius of the filter by moving the Radius slider.
Click OK.

Maximum and Minimum

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.

Offset

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.

Plug‑in filters

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.

Nota:

If you have problems or questions about a third-party plug‑in, contact the plug‑in’s manufacturer for support.

Digimarc filter

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.

Detect the Digimarc filter

Choose Filter > Digimarc > Read Watermark. If the filter finds a watermark, a dialog box displays the Digimarc ID, copyright year (if present), and image attributes.
Click OK. If you have a web browser installed, click Web Lookup to get more information about the owner of the image. This option opens the browser and displays the Digimarc website, where contact details appear for the given Digimarc ID.

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