1 .. -*- coding: utf-8; -*-

     2 .. include:: HEADER.rst

     3 

     4 =============

     5  Measurement

     6 =============

     7 .. contents::

     8 

     9 dpi

    10 ===

    11 

    12 Dots per inch.

    13 

    14   http://en.wikipedia.org/wiki/Dots_per_inch

    15 

    16 ppi

    17 ===

    18 

    19 pixels per inch, pixel density.

    20 

    21 ====== =========== ===

    22  Inch  Resolution  ppi

    23 ====== =========== ===

    24   17"   1280x1024   96

    25   19"   1280x1024   86

    26   19"   1600x1200  105

    27   21"   1600x1200   95

    28    2"    240x320   196

    29 ====== =========== ===

    30 

    31   http://en.wikipedia.org/wiki/Pixels_per_inch

    32 

    33 lpi

    34 ===

    35 

    36 lines per inch.

    37 

    38   http://en.wikipedia.org/wiki/Lines_per_inch

    39 

    40 bpp

    41 ===

    42 

    43 bits per pixel, color depth.

    44 

    45  * 1 bpp, 2 colors (monochrome)

    46  * 2 bpp, 4 colors

    47  * 3 bpp, 8 colors

    48  * 8 bpp, 256 colors

    49  * 16 bpp, 65,536 colors ("Highcolor" )

    50  * 24 bpp, 16.8 million colors ("Truecolor")

    51 

    52   http://en.wikipedia.org/wiki/Color_depth