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White lines definition

The horizontal limitingresolution of a television system is usually determined by its electrical bandwidth. Assuming that the aperture response (a universal criterion for specifying picture definition and other aspects of imaging system performance) of the system components is adequate to make the black-and-white line pair (two television lines) visible, the equation for horizontal resolution Rh is, therefore... [Pg.1709]

The preceding definition is related to the specification of resolution with respect to the human visual system. In this case resolution is determined by the closeness of spacing between alternate black and white lines of equal width and defined contrast. These are known as line pairs and for a 300-dpi printer it would result in a value of 150 line pairs per inch. This is not strictly correct since the black fines would be wider than the white spaces due to the roundness of the dot. Since the human visual system has a response that approaches zero near 300 fine pairs per inch, gains made in text print quality by increasing resolution... [Pg.2145]

Stars... delicate floating films of colour... Then an abrupt rush of countless points of white light swept across the field of view, as if the unseen millions of the Milky Way were to flow a sparkling river before the eye. [...] Then I began to see zigzag lines of very bright colours, [then] definite objects associated with colours. [...]... [Pg.364]

By assembling these distinct strains of thought, I am drawing attention to a broad-based grievance with a rhetorical figure that remains vague by definition but that has nonetheless become a popular trope in recent years the black-white, monochrome analysis of race. In the mass media, a recent Newsweek article boldly announces that the color line in the post-civil rights United States is not just a matter of black and white anymore the nuances of brown and yellow and red mean more—and less—than ever ... [Pg.249]


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See also in sourсe #XX -- [ Pg.88 ]




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White lines

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