O'Reilly logo

Production for Print by Mark Gatter

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Screen Angles and Screen Clash

As we have already seen (in Chapter 1), if you want to print a photograph using black ink, you used to have to break it up into dots by bouncing the image through a screen and on to film. Alternatively, you can use software like Adobe Photoshop together with digital cameras and/or scanners to capture the image, and then the imagesetter (the machine that outputs plates or film from your files) rasterizes the result, i.e. turns all the pixel information into halftone dots. Whichever method you use, screen or software, the end result is an illusion of an image that is actually made up of a grid of dots arranged in a grid of lines at 90° to each other.

This is why at a print shop they do not talk about dots so much ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required