10 05, 2013

Bitmaps, PPI, and DPI

May 10th, 2013|Categories: General, PaperScan, Tips & tricks|Tags: , , , |

Hi folks, As promised in the previous article, today we will try to untangle the frequent confusions generated among many computer users by this simple word: "resolution." To do that, we are going to explain screen resolution, printing resolution, pixel dimensions, physical dimensions, and how [...]

26 04, 2013

Bitmaps: Some Explanations

April 26th, 2013|Categories: General, Tips & tricks, Uncategorized|Tags: , , |

Hi folks, As shown in a previous article, all raster (bitmap) files hold information on each and every pixel in the grid that makes an image. Today we are going to describe some consequences of this storage principle and, hopefully, we will shed some light [...]

19 04, 2013

LZW and Three Graphics File Formats

April 19th, 2013|Categories: General, Tips & tricks|Tags: , , , |

Hi folks, This week we are going to tell you a short story about LZW compression and how it influenced three widespread graphics file formats: TIFF, GIF, and PNG. The story began in 1977 and 1978 when Israeli computer scientists Abraham Lempel and Jacob Ziv [...]