Ikarus is a type design and production software developed by URW and Brendel Informatik foundries, for converting existing typefaces and logos into digital format for use on computer driven printing, plotting and sign cutting devices.
It was licensed by major foundries such as Agfa-Compugraphic, Autologic, Berthold, International Typeface Corporation, Letraset, Linotype, Monotype, Stempel, and others.
Its "IK" format was convertible into diverse vendor representations, including Type3 and Type1 PostScript formats as well as the TrueType format by Apple and Microsoft.
Ikarus uses a spline model of the outline shape of each character within a typeface to give a fully scalable representation. The curve segments are essentially circle arcs, with tangent continuity maintained at joins. It is a very simple format to mark up manually. Being a vector/curve based format, any rendering resolution can be attained (by rasterisation) with equal accuracy from one relatively small set of data. The Ikarus coordinates for a shape all fall on the outline of that shape (as opposed to Bézier curves where 'control' points can be inside or outside the outline).
The functionality of Ikarus can be expanded using plug-ins.
Originally invented by URW employee Dr Peter Karow, Ikarus (German spelling of the mythical figure Icarus) got its name from the frequency with which it crashed in the early days of its development. It was designed to run on minicomputers such as DEC VAX and later adapted to microcomputers as they became increasingly powerful. In 1975, IKARUS was introduced at ATypI in Warsaw. [1]
By the 1980s a huge library of typefaces and logos existed as photographic film and needed to be input into computers for the latest generation of printing and sign-making devices. Unfortunately, normal scanning gives a rasterized shape at the resolution of the scanning device which leads to degradation of quality when scaling up and down. This is a particular concern in the sign making industry where individual letters may be metres across, many times the size of the original artwork. Ikarus enables a human operator to input the features of a complex shape with curves, corners and straight lines (e.g. a letter of the alphabet) to a computer which stores it as a mathematical representation, for all intents and purposes independent of the size of the original artwork and of the final output. A version of Ikarus tailored for signmaking applications was released by URW as "Signus".
The advent of desktop publishing in the 1980s using Apple Macintosh computers coupled with laser printers led to a shift away from a small number of specialized print bureaux acquiring relatively expensive fonts to a growing market for cheap mass-produced fonts. The drawback of Ikarus for catering for this new market was that, while extremely accurate, it was very labour-intensive.
After Adobe Systems started licensing BuildFont, its technology for converting existing digital typeface data into PostScript font format, Ikarus gradually lost its leading position. Ikarus is being further developed by URW++ and DTL, Dutch Type Library, ’s-Hertogenbosch, the Netherlands.
The first stage of digitization of a typeface is to prepare the artwork by marking up. This involves putting tick marks around any curves at approximately 30 degree intervals along with extra tangent points where a curve blends onto a straight line. Some form of accurate graphics tablet is then used to input three types of points: curve points, corner points and tangent points. Any irregularities (e.g. lumps and flat spots) are then edited out by adjusting the position of the points on the computer. The human eye is extremely sensitive to spotting irregularities on smooth outlines and typical adjustments are of the order of tenths of millimetres on a character one hundred millimetres high. As the computer screen displays a rasterized image at relatively low resolution, high quality print outs (traditionally bromides) or cuts in film (Ulano) are used to proof the digitized shapes.
The DTL FontMaster core is based on Ikarus. Furthermore, URW is also the exclusive Germany distributor for Dutch Type Library, DTL FontMaster's developer. DTL FontMaster Utilities are also developed by URW with DTL's president and founder Frank Blokland.
A Bézier curve is a parametric curve used in computer graphics and related fields. A set of discrete "control points" defines a smooth, continuous curve by means of a formula. Usually the curve is intended to approximate a real-world shape that otherwise has no mathematical representation or whose representation is unknown or too complicated. The Bézier curve is named after French engineer Pierre Bézier (1910–1999), who used it in the 1960s for designing curves for the bodywork of Renault cars. Other uses include the design of computer fonts and animation. Bézier curves can be combined to form a Bézier spline, or generalized to higher dimensions to form Bézier surfaces. The Bézier triangle is a special case of the latter.
PostScript is a page description language and dynamically typed, stack-based programming language. It is most commonly used in the electronic publishing and desktop publishing realm, but as a Turing complete programming language, it can be used for many other purposes as well. PostScript was created at Adobe Systems by John Warnock, Charles Geschke, Doug Brotz, Ed Taft and Bill Paxton from 1982 to 1984. The most recent version, PostScript 3, was released in 1997.
TrueType is an outline font standard developed by Apple in the late 1980s as a competitor to Adobe's Type 1 fonts used in PostScript. It has become the most common format for fonts on the classic Mac OS, macOS, and Microsoft Windows operating systems.
Vector graphics are a form of computer graphics in which visual images are created directly from geometric shapes defined on a Cartesian plane, such as points, lines, curves and polygons. The associated mechanisms may include vector display and printing hardware, vector data models and file formats, as well as the software based on these data models. Vector graphics are an alternative to raster or bitmap graphics, with each having advantages and disadvantages in specific situations.
Metafont is a description language used to define raster fonts. It is also the name of the interpreter that executes Metafont code, generating the bitmap fonts that can be embedded into e.g. PostScript. Metafont was devised by Donald Knuth as a companion to his TeX typesetting system.
Type design is the art and process of designing typefaces. This involves drawing each letterform using a consistent style. The basic concepts and design variables are described below.
A typeface is a design of letters, numbers and other symbols, to be used in printing or for electronic display. Most typefaces include variations in size, weight, slope, width, and so on. Each of these variations of the typeface is a font.
Arial is a sans-serif typeface in the neo-grotesque style. Fonts from the Arial family are included with all versions of Microsoft Windows after Windows 3.1, as well as in other Microsoft programs, Apple's macOS, and many PostScript 3 printers. In Office 2007, Arial was replaced by Calibri as the default typeface in PowerPoint, Excel, and Outlook.
Courier is a monospaced slab serif typeface commissioned by IBM and designed by Howard "Bud" Kettler (1919–1999) in the mid-1950s. The Courier name and typeface concept are in the public domain. Courier has been adapted for use as a computer font, and versions of it are installed on most desktop computers.
A computer font is implemented as a digital data file containing a set of graphically related glyphs. A computer font is designed and created using a font editor. A computer font specifically designed for the computer screen, and not for printing, is a screen font.
In computer graphics, image tracing, raster-to-vector conversion or raster vectorization is the conversion of raster graphics into vector graphics.
Font hinting, also known as instructing, is the use of mathematical instructions to adjust the display of an outline font so that it lines up with a rasterized grid. At low screen resolutions, hinting is critical for producing clear, legible text. It can be accompanied by antialiasing and subpixel rendering for further clarity.
Apple's Macintosh computer supports a wide variety of fonts. This support was one of the features that initially distinguished it from other systems.
Scantext was a professional code-driven digital typesetting system popular in the 1980s, rendered obsolete by the popularity of the personal computer and desktop publishing software. It was developed and built by Scangraphic, a division of Dr. Böger Duplomat Apparate GmbH & Co. KG, based in Wedel near Hamburg, Germany.
PostScript fonts are font files encoded in outline font specifications developed by Adobe Systems for professional digital typesetting. This system uses PostScript file format to encode font information.
Evert Bloemsma was a Dutch photographer, graphic designer, type designer, and art school educator.
Typefaces, fonts, and their glyphs raise intellectual property considerations in copyright, trademark, design patent, and related laws. The copyright status of a typeface and of any font file that describes it digitally varies between jurisdictions. In the United States, the shapes of typefaces are not eligible for copyright but may be protected by design patent. Typefaces can be protected in other countries, including the United Kingdom, Germany, and France, by industrial design protections that are similar to copyright or design patent in that they protect the abstract shapes. Additionally, in the US and some other countries, computer fonts, the digital instantiation of the shapes as vector outlines, may be protected by copyright on the computer code that produces them. The name of a typeface may also be protected as a trademark.
Adobe Systems, Inc. v. Southern Software, Inc. was a case in the United States District Court for the Northern District of California regarding the copyrightability of digitized typefaces. The case is notable since typeface designs in general are not protected under United States copyright law, as determined in Eltra Corp. v. Ringer. Since that case, the United States Copyright Office has published policy decisions acknowledging the registration of computer programs that generate typefaces. In this case, the court held that Adobe's Utopia font was protectable under copyright and Southern Software, Inc.'s Veracity font was substantially similar and infringing.
URW Type Foundry GmbH is a type foundry based in Hamburg, Germany. The foundry has its own library with more than 500 font families. The company specializes in customized corporate typefaces and the development of non-Latin fonts. It has been owned by Monotype Imaging since May 2020.
Peter Karow is a German entrepreneur, inventor and software developer. He holds several patents in the field of desktop publishing and is known for his work on computer fonts. He contributed with several books and patents to the development of operating systems for computers. He is recognized as the inventor of outline computer fonts.