Software technology used to minimise photo file size. The more you compress a JPEG image, the more visible the compression artefacts become. Digital cameras generally offer three different compression ratios or ‘quality’ settings. ‘High’ or ‘Fine’ quality uses the least [...]
Tag Archive for 'JPEG'
Small flaws caused by compression in JPEG photos. These include a faintly discernible ‘block’ pattern in even-toned areas, a slight loss of fine definition, and some edge effects or ‘halos’ around high-contrast edges. With high-quality JPEGs (low compression), these artefacts [...]
Usual file format for digital photos. The JPEG file format uses what’s called ‘lossy’ compression to produce small, manageable files from digital images. All cameras can save images in the JPEG format, and at different quality (compression) settings.
Software processing system which reduces file size. The most common example is the JPEG file format, which can compress a digital photo into a file of just 2-5Mb and allows many photos to be stored on a memory card. Uncompressed, [...]
Small digital defect created by image processing. The term is used to describe the edge halos you get from excessive sharpening, for example, or any other small-scale imperfection associated with image-editing processes or the characteristics of sensor design. Usually very [...]