How to Halftone Photographs in Adobe Photoshop

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A halftone screen is a pattern of dots of different sizes used to reproduce continuous tone images, such as photographs, in the printing process. Printers simulate the color gray by using halftone dots printed on a grid. The eye blends these tiny dots into smooth tones. A halftone effect has also become a trendy and useful design element, often in a pop art or comic style, and can be easily created in Photoshop.

Things You'll Need

  • PC or Mac computer
  • Adobe Photoshop
  • Digital image

Black and White Halftone

  • In Photoshop, select "File" in the menu, then pull down to "Open" to select a photograph to practice on. Click on the name of the photograph to open it.

  • Locate "Image" in the file menu, pull down to select "Mode," then choose "Grayscale" from the sub-menu. Click "OK" to confirm that you want to discard color information.

  • Select "Image" again in the file menu; pull down to select "Bitmap." Change Output to "300 dpi." Locate "Method," then select "Halftone Screen" and click "OK." Note the "Halftone Screen" dialogue box that opens, and change Frequency to "20." Change Angle to "0." Change Shape to "Round." Click "OK."

  • To save your image, go to the "File" menu and pull down to "Save."

Color Halftone

  • Select "File" in the Photoshop menu, then pull down to "Open" to select a photograph to practice on. Click on the name of the photograph to open it.

  • Locate "Filter" in the file menu, pull down to select "Pixelate," then "Color Halftone" from the sub-menu. Experiment with different sized pixels, between "4" (minimum) and "20" (maximum) to get the effect you desire. Change "Screen Angles (Degrees)" to:
    Channel 1: "0"
    Channel 2: "0"
    Channel 3: "0"
    Channel 4: "0"
    Click "OK."

  • To save your image, go to the "File" menu and pull down to "Save."

References

  • Photo Credit halftone pattern, dots image by Suto Norbert from Fotolia.com
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