Prepress & Color Control Terms, ZTerms

Resolution

Resolution

/ˌrɛzəˈluːʃən/

General Definition

Resolution is the ability of a system (such as a camera, scanner, monitor, or CTP device) to distinguish fine details. This concept starts from the image capture stage, continues through design software, and extends to the final output stage in Lithography (printing). Proper management of Resolution at all stages is vital to prevent aliasing and ensure accurate reproduction of color tones. In printing, this concept includes input resolution (PPI, or Pixels Per Inch), device output resolution (DPI, or Dots Per Inch), and halftone resolution (LPI, or Lines Per Inch).

Two versions of an astronaut helmet image, showing high resolution, pixelated low resolution, and a halftone print effect.

Image resolution comparison: PPI and LPI.

Alt text Three versions of an astronaut helmet image, showing high resolution, pixelated low resolution, and a halftone print effect.

Image resolution comparison: high PPI, low PPI, and LPI.

Real-World Usage

Resolution in the general sense defines quality and the level of detail that can be displayed. This resolution means defining pixel density (like PPI) in software for graphic designers, while for Lithography experts, it means determining the output clarity of plate and cliché-making devices. Correct implementation of resolution settings in graphic software is the foundation for a quality file entering the production process.

In production, resolution plays a fundamental role in Halftone and Screening processes; because device output resolution (like DPI) directly affects the formation and quality of halftone dots (like LPI). A lack of coordination between the input resolution and device output resolution can lead to unstable dots or the loss of fine details in print. This general importance shows that Resolution is not a single variable but a set of standards throughout the job

Consultant's Note

As a Production, Print, and Packaging Consultant, I recommend that your teams focus on the Resolution Chain strategy. This concept states that the final quality of a job is determined by the lowest resolution at any point in the chain, from the camera to the printing press. The goal is not for everything to have the maximum resolution, but to identify the smallest limiting element (Bottleneck) in quality.

This general perspective is the foundation of all our future internal linking. We must guide clients to establish the optimal balance between the three main types of resolution (PPI of the input file, LPI of the final print, and DPI of the output device). This balance ensures that investment (time and cost) is not made in unnecessary resolutions, while achieving the required final quality for the target market. This strategy is also the best technical justification for production decisions.

Aligned with: Adobe / ISO 12647 / FOGRA