Picture Formats
- 1. JPEG JPEG (Joint Photographic Experts Group) files are a lossy format. The DOS filename extension is JPG and some other operating systems may use JPEG. Mostly every camera are able to save images in JPEG format. Its format supports 8 bits per colour; red, green and blue (24-bit in total). JPEG produces relatively small files.
- 2. PNG The PNG (Portable Network Graphics) file format is regarded, and was made, as the free and open-source successor to the GIF file format. The PNG file format supports true color (16 million colors) whereas the GIF file format only allows 256 colors. PNG excels when the image has large areas of uniform color. The lossless PNG format is best suited for editing pictures, and the lossy formats like JPG are best for final distribution of photographic-type images because of smaller file size. Many older browsers do not yet support the PNG file format, however with the release of Internet Explorer 7 all popular modern browsers fully support PNG. The Adam7-interlacing allows an early preview even when only a small percentage of the data of the image has been transmitted.
- 3. GIF GIF (Graphics Interchange Format) is limited to an 8-bit palette, or 256 colors. This makes the GIF format suitable for storing graphics with relatively few colors such as simple diagrams, shapes, logos and cartoon style images. The GIF format supports animation and is still widely used to provide image animation effects. It also uses a lossless compression that is more effective when large areas have a single color, and ineffective for detailed images or dithered images.