File Types and Extensions

1. File Types and Extensions

2. Notes File Extension notes You can display the file extensions by control panels, clicking in the top right, “small icons” then click view, then unlick the box saying “hide extensions for known files” and then press apply and ok.

3. Notes on JPG Jpeg stands for Joint Photography Experts group: it defines how an image is compressed into a stream of bytes and decompressed back into an image, but not the file format used to contain that stream.

4. JPG

5. Notes on PNG • Portable Network Graphicsis a bitmapped image format. PNG was created to improve and replace GIF (Graphics Interchange Format) as an image-file format not needing a patent license. • PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colours),grayscale images (with or without alpha channel), and full-colour non-palette-based RGB[A] images (with or without alpha channel). PNG was made for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB colour spaces such as CMYK. • PNG files nearly always use file extension PNG or png and are assigned MINE media type image on 14 October 1996. PNG was published as an ISO/IEC standard in 2004.]

6. PNG

7. Notes on Gif The Graphics Interchange Format (GIF) is an image format that was introduced by CompuServein 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability. The format supports up to 8 bits per pixel allowing a single image to reference a palette of up to 256 distinct colours. The colours are chosen from the 24-bit RGB colour space. It also supports animations and allows a separate palette of 256 colours for each frame. The colour limitation makes the GIF format unsuitable for reproducing colour photographs and other images with continuous colour, but it is well-suited for simpler images such as graphics or logos with solid areas of colour.

8. Gifs