We think of the Mona Lisa like a brilliant instance of Renaissance art, like a mysterious image, or as a thoughtful study in composition, light, and shadow. We don't think of it like a mathematical formula. But in the computer globe, all art, graphics, designs, colours, and lines involve some kind of mathematical algorithm. That statement is not meant to belittle the works of Da Vinci along with other great artists. Mathematical algorithms can't produce art; that nevertheless takes a true artist, regardless of whether the artist's tools are brush, oils, and canvas or a computerized stylus. But math embedded in specific file formats can describe any piece of existing fine art. A graphics-file image of the Mona Lisa that you are able to show on your PC may be the outcome of mathematical calculations about the bytes of data saved in that file.
These days, all the capabilities of the darkroom and an artist's studio are available on a individual computer. You can retouch, lighten, darken, crop and do virtually something else to a computer image that you could do to a photograph. You are able to do more, really.
Having a PC, even a semi-skilled retoucher can make Mona Lisa frown. Other software lets an artist re-create the effects of different media: oils, watercolors, airbrush, charcoal, and so on. The artist can even mix media in ways that are hard to match in real life-to obtain, say, the effect of a water-based paint dissolving chalk lines on paper.
Modern PC graphics aren't just about creating pretty pictures. We live in a globe of images and colours; not a world of terms, that are, after all, only abstractions for that things we see, feel, touch, and do. We use shape and color in everyday life to convey information quicker than words can. Just think about the red, octagonal stop sign; you can be illiterate and know what it means. So, too, in computers, graphics are an increasingly essential way of conveying information. Imagine an onscreen map of the city, showing in red those Zip code areas where family income is much more than $100,000. You comprehend it at a glance. A spreadsheet printout of the exact same information consisting of nothing but quantities would require ponderous study to comprehend.
Designs and colors are information as surely as terms are. The difference is that words are nicely defined and restricted, but shapes and colors have infinite variations, which indicates that a PC handling graphics is up towards a much more daunting work than the old text-based DOS computers. There are two fundamental ways by which graphics software copes with this infinity of variation: through bitmap and vector graphics. This article looks at how bitmapped and vector images are saved and just how graphics software translates the data into images.
Shapes and colours are information as certainly as terms are. The distinction is that words are nicely defined and limited, but shapes and colours have infinite variations, which means that a PC handling graphics is up against a more daunting work than the old text-based DOS computers. There are two basic methods in which graphics software copes with this infinity of variation: via bitmap and vector graphics. This article appears at how bitmapped and vector images are stored and how graphics software translates the data into images.
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