Archive for April, 2013

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 on some related, “esoteric” terms. First, all bitmap images are […]

Hi folks, This week we are going to tell you a short story about LZW compression and how it influenced 3 widespread graphics file formats: TIFF, GIF and PNG. The story begins in 1977 and 1978 when israeli computer scientists Abraham Lempel and Jacob Ziv published descriptions of lossless data compression algorithms named LZ-77 and […]

What’s WIA

Hi folks, After having presented previously the basic idea about scanner drivers as well as the bottom line on TWAIN, today we will try to shed some light on WIA. Wikipedia definition reads: “Windows Image Acquisition (WIA; sometimes also called Windows Imaging Architecture) is a Microsoft driver model and application programming interface (API) for Microsoft […]

Hi folks, Today we are going to try to explain as simple as possible what TWAIN is all about. Some time ago one could operate a scanner by using manufacturer’s software only. That happened because, following a general pattern in software history, each producer attempted to provide its own proprietary product standard at first. But […]