Resolution Continuous Tone and Halftone Images

Continuous Tone and Halftone Images
A continuous tone image must be broken down into a dot pattern called a halftone before it can be offset printed.

Remember that the dots for a vector/line art image are all equal in size to create the flat color.

Dots which make up a halftone image are all DIFFERENT sizes. These different sizes create the highlights, midtones and shadow areas in that image.

All raster/pixel (photographic images) based images are altered in Photoshop.

The link below begins to explain what a continuous tone and halftone image are.

Resolution or what you need to know about creating raster images that are the correct "input" and "output" resolution for either print or web.

Resolution and Photoshop