What is reference grid?

  • (noun): A network of horizontal and vertical lines that provide coordinates for locating points on an image.
    Synonyms: grid

Some articles on reference grid, grid:

Aztec Code - Encoding - Laying Out The Message
... symbol has, in addition to the core, a "reference grid" of alternating black and white pixels occupying every 16th row and column ... These known pixels allow a reader to maintain alignment with the pixel grid over large symbols ... Likewise, additional reference grid rows and columns are inserted ±32 pixels from the center, making a 12-layer symbol 67×67 pixels ...

Famous quotes containing the word reference:

    I am more and more convinced that, with reference to any public question, it is more important to know what the country thinks of it than what the city thinks. The city does not think much.
    Henry David Thoreau (1817–1862)