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Everything about Pixel density

Screen resolution measured in pixels per length

Pixels per inch (ppi) and pixels per centimetre are measurements of the pixel density of an electronic image device, such as a computer monitor or a television set's display, or image digitizing device such as a camera or image scanner. Horizontal and vertical density are usually the same, as most devices have square pixels, but differ on devices that have non-square pixels. Pixel density is not the same as resolution — where the former describes the amount of detail on a physical surface or device, the latter describes the amount of pixel information regardless of its scale. Considered in another way, a pixel has no inherent size or unit, but when it is printed, displayed, or scanned, then the pixel has both a physical size (dimension) and a pixel density (ppi). Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Pixel densityA 5-minute orientation
  2. Skim a recent paper: Per-Pixel Uncertainty Quantification and Reporting for Satellite-Derived Chlorophyll-a Estimates via Mixture Density NetworksInfluential work since 2022
  3. Pick up a classic book: Medical image analysisThe most-reprinted book on the subject
  4. Read the landmark paper: Efficient adaptive density estimation per image pixel for the task of background subtractionCited 1,348 times
  5. Go sideways: Dots per inchA closely related topic
  6. Go sideways: Dot pitchA closely related topic

đź“– Definitions

No dictionary entry for this exact phrase.

🗂️ The subject at a glance

  1. Basic principles
  2. Outputting to a different device
  3. Printing on paper
  4. Computer displays
  5. Scanners and cameras
  6. Smartphones
  7. Metrication
  8. Image file format support

🏆 Landmark papers (most cited)

🆕 Influential since 2022

đź“š Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

đź”— Related topics