Video
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Light Light is a form of energy that has two aspects: An electromagnetic wave aspect A corpuscular aspect (photons) The light emitted by... Beginners > Video |
Computer representation of colour In order to be able to handle colours correctly and to exchange colorimetric information it is necessary to have the means to... Beginners > Video |
CIE / Lab (L*a*b) coding Colours may be perceived differently depending on individuals and may be displayed differently depending on the peripheral display... Beginners > Video |
RGB coding The RGB coding (Red, Geen, Blue), developed in 1931 by the International Lighting Commission (Commission Internationale de... Beginners > Video |
HSL (TSL) coding The HSL Model (Hue, Saturation, Luminance), based on the work of painter Albert H.Munsell (who created the Munsell Atlas), is a... Beginners > Video |
CMYK (CMJN) Coding CMY Coding (Cyan, Magenta, Yellow) is to subtractive synthesis, what RGB coding is to additive synthesis. This model consists in... Beginners > Video |
Computer graphics The field of the IT concerning the creation and the handling of digital images is called computer graphics. Computer graphics cover... Beginners > Video |
vector and bitmap images There are two main categories of images: bitmap images (also called raster images): these are pixeled images, i.e. a set of points... Beginners > Video |
Graphic file formats We previously learned the way in which an image was coded to be shown on a monitor, however, when we want to store an image in a file,... Beginners > Video |
The BMP format The BMP is one of the simplest formats. It was jointly developed by Microsoft and IBM, which explains why it is particularly... Beginners > Video |
GIF format The GIF format (Graphic Interchange Format) is a bitmap (raster) graphic file format developed by Compuserve. There are two versions... Beginners > Video |
PCX format The PCX format was developed by ZSoft, publishing the PaintBrush software which Microsoft Windows operating systems were equipped with... Beginners > Video |
PNG format The PNG format (Portable Network Graphics or Ping format) is a bitmap (raster) graphic file format. It was developed in 1995 in order... Beginners > Video |
TIF format The TIF format (Tagged Image File Format) is a bitmap (raster) graphic file format. It was developed in 1987 by Aldus (now belonging... Beginners > Video |
Data compression Nowadays, the computing power of processors increases more quickly than storage capacities, and is much faster than network band... Beginners > Video |
RLE Compression Pixel packing is a method which allows pixels to be stored in an optimal way: for a monochrome image there are, by definition, only... Beginners > Video |
Huffman coding In 1952, David Huffman proposed a statistical method allowing a binary code word to be assigned to the various symbols to be... Beginners > Video |
LZW Compression Abraham Lempel and Jakob Ziv are the creators of the LZ77 compressor, invented in 1977 (hence its name). This compressor was then used... Beginners > Video |
JPEG compression The acronym JPEG (Joint Photographic Expert Group comes from the meeting held in 1982 of a group of photographic experts, whose main... Beginners > Video |
Image processing The set of techniques allowing a digital image to be modified with the aim of improving it or of extracting information from it, is... Beginners > Video |
