Select your language
  • Deutsch

    Sämtliche Inhalte auf der CPN-Website sind auf Englisch verfügbar. Einige Inhalte, wie z. B. Produktbeschreibungen, aktuelle Produkteinführungen und einige technische Artikel, sind ebenfalls auf Deutsch, Spanisch, Französisch, Italienisch und Niederländisch erhältlich. Wählen Sie in der Liste oben Ihre Sprache aus, damit sämtliche darin verfügbaren Inhalte automatisch entsprechend Ihrer Wahl dargestellt werden. Ansonsten wird als Standardsprache Englisch verwendet.

  • English

    All content published on the CPN website is available in English. Some content – such as product descriptions, recent product launches and some technical articles – is also available in German, Spanish, French, Italian and Dutch. Choose your language from the list above and all content that is available in your language will automatically be displayed in your language, otherwise the default language will be English.

  • Español

    Todo el contenido publicado en la página web de CPN está disponible en inglés. Parte del contenido –como descripciones de producto, lanzamientos recientes de productos y algunos artículos técnicos– también están disponibles en alemán, español, francés, italiano e holandés. Elija su idioma en la lista anterior y todo el contenido que esté disponible en su idioma aparecerá automáticamente en ese idioma, o , si no, en el idioma predeterminado que es el inglés.

  • Français

    Tout le contenu publié sur le site Web de CPN existe en anglais. Une partie du contenu (comme les descriptions de produit, les lancements récents de produit et certains articles techniques) est également publié en allemand, en espagnol, en français, en italien et en néerlandais. Choisissez la langue dans la liste ci-dessus, et tout le contenu offert dans votre langue s’affiche automatiquement ; par défaut, le reste s’affiche en anglais.

  • Italiano

    Tutti i contenuti pubblicati sul sito CPN sono disponibili in inglese. Alcuni contenuti come descrizioni di prodotto, lanci di prodotti recenti e alcuni articoli tecnici sono disponibili anche in tedesco, spagnolo, francese, italiano e olandese. Seleziona la lingua dall'elenco in alto e automaticamente si visualizzeranno tutti i contenuti disponibili in quella lingua; diversamente la lingua di default sarà l’inglese.

  • Nederlands

    Alle inhoud die op de CPN-website wordt gepubliceerd, is beschikbaar in het Engels. Bepaalde inhoud, zoals productbeschrijvingen, onlangs gelanceerde producten en sommige technische artikelen, zijn ook beschikbaar in het Duits, Spaans, Frans, Italiaans en Nederlands. Kies de taal uit bovenstaande lijst, waarna alle inhoud die beschikbaar is in de gewenste taal, automatisch in die taal wordt weergegeven. Anders is Engels de standaardtaal.

Infobank

Digital image file: Binary format

The data provided by a photo sensor is analog. It expresses the brightness of light in the form of an electrical charge − the brighter the light the greater the charge.

A computer cannot handle this. A computer only recognizes two states − on and off. These are given values of 1 and 0. This might appear limiting, but it’s not. We are used to expressing numbers in the decimal system that uses ten different symbols. This system probably arose because we have eight fingers and two thumbs on our hands. But it is just as easy to express numbers with two symbols. This is called a binary system (binary means dual, or involving pairs).

1 and 0 are binary digits − or ‘bits’. The value of each bit depends on its position. Counting from the right, the first position represents 1, the second position is 2, the third position is 4, the fourth position is 8, and so on. So the binary number 1010 is (0 x 1) + (1 x 2) + (0 x 4) + (1 x 8). This is equivalent to 10 in the decimal system.

Most digital photography is based around ‘strings’ of eight digits. 11111111 represents 128 + 64 + 32 + 16 + 8 + 4 + 2 + 1, which is 255. However, the computer also recognises 00000000, so 256 different values can be formed from the string of 8 digits.

This means that if the analog data from the sensors is converted to the binary format, the computer is able to distinguish between 256 different brightness values − equivalent to 256 different shades of grey.

With the cluster of red, green and blue filters, three strings, each of 8 bits, are collected. This gives 24 bits defining the colour of the pixel area. This number of bits is often referred to as the ‘colour depth’.

The number of different colours, or hues, that the computer can recognise using 24-bit colour depth is 256 x 256 x 256. This comes to an amazing 16.7 million.

It is difficult to imagine, but a computer sees an image as nothing more than a series of binary digits. Somehow, 110100010011 does not quite capture the atmosphere of a scene (unless you are a computer, of course!).

Bits and bytes

8 bits = 1 byte
1024 bytes = 1 kilobyte
1024 kilobytes - 1 megabyte (MB)
1024 megabytes = 1 gigabyte (GB)

Kilo normally refers to 1,000. However, in the binary system the key numbers are those obtained by doubling up from 1 (1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1,024, etc.). The nearest number to 1,000 in the sequence is 1,024, so the term kilo is applied to this. Similar approximations are made with mega (one million) and giga (one thousand million).