Photoshop CS Timesaving Techniques For Dummies [Electronic resources] نسخه متنی

Making Your Silkscreen

The steps here are pretty straightforward, but they do take some knowledge of the Channels palette. For instance, you need to know how to select multiple channels. If you need a refresher on channels, turn to Technique 52.

Here’s how to turn your image into a photo silkscreen:

Open the image that you want to use.

For this example, I’m using the four lizards shown in Figure 40-1.




Figure 40-1: These lizards are going to be silkscreened.






In the Channels palette, choose the Green and Blue channels.





Choose Image>Adjustments>Equalize.





In the Channels palette, choose the Red channel.





Choose Filter>Other>High Pass.





In the High Pass dialog box, set the Radius to 3, as shown in Figure 40-2.




Figure 40-2: Set the Radius to 3 in the High Pass dialog box.






Click OK to close the High Pass dialog box and apply the High Pass filter to the Red channel.





With the Red channel still selected, choose Image>Adjustments>Threshold.





In the Threshold dialog box, set the Threshold Level to 125, as shown in Figure 40-3.

You may need to fiddle a little with this setting to get the best balance between black and white.




Figure 40-3: In the Threshold dialog box, set the Threshold Level to 125.







Click OK to close the Threshold dialog box and apply the command to the Red channel.

The four lizards now look like those shown in Figure 40-4.




Figure 40-4: After applying the Threshold command to the Red channel, the lizards are starting to look like a silkscreen.






In the Channels palette, select the Blue channel.





Choose Filter>Noise>Median.





In the Median dialog box, set the Radius to 5, as shown in Figure 40-5.




Figure 40-5: Set the Radius to 5.


Setting the radius to 4 makes the Blue channel very smooth looking.





With the Blue channel still selected, choose Image>Adjustments>Threshold.





In the Threshold dialog box, set the Threshold Level to 40.

You may need to play with this setting to get a good balance between black and white.

After adding a black background, the four lizards look just like a Warhol silkscreen, as shown in Color Plate 40-1.




Figure 40-6: The lizards definitely look reminiscent of a Warhol silkscreen.








Tip

Another way to create a photo silkscreen effect is to apply the Stamp filter to one of the channels. If you want to experiment, open an image and apply the Stamp filter to the Red channel first and see what kind of results you get.