JPG– Abbreviation for Joint Photographic Experts Group. A really popular image file format that can be easily published across multiple online platforms. In Photoshop, when I want to publish one of my graphic images on Instagram, I usually export the file as a JPEG the file size and resolution is easier to upload.
GIF– Abbreviation for graphics Interchange Format, which is used everywhere on the Internet sometimes as either an interlaced, a transparent, or the most common, an animated GIF. Originally developed by CompuServe and is often referred to as a ‘CompuServe Bitmap.’
PNG– Abbreviation for Portable Networks Graphics. Thought it may sound a little like the last two terms, this is a file format widely used for Web design and HTML platforms because of its capability to carry on a high resolution for a compressed data file. A PNG file also has the ability to be converted with a transparent background which its make more accessible for designers in general.
Lossy Compression– Typically associated with JPEG’s and MP3’s, which is a compressed file with the results of lost data and quality that is mostly unrecognizable until closely inspected. This type of file can help decrease file sizes by 80% for most JPEG’s, MP3’s and even AAC formats.
Dithering– It is a process of trying to stimulate colors that are not supported within the file format in use. When using images that have gradients or continuous colors, dithering can happen to prevent the banding effect once loaded. There are two types of dithering: application dither and browser dither.
8-Bit Color– JPEGs create standard 8-bit images and have these type of colors are in combinations of 8, red, yellow, green, white, magenta, cyan, blue, and black; but mostly a combo of red, blue, and green. (RGB) 8-bit files are used more often because they are much smaller in size, which upload faster online.
Hexidecimal– A 16-number system of unique number symbols 0 to 9 and letters A to F. Hexidecimal numbers are said to be easiest for us humans to read because they can represent every byte as two consistent digits in the 8-bit system.
Transparency Matte– In Photoshop, this is the process of filling or blending images such as GIF, PNG, and JPEG by matching transparent pixels to the background image. This can help your images become more adaptable for layered compositions.
Image Map– A graphic map that is designed to have click-able areas that link images to different destinations or pages on a site. This can be applied to graphics, logos, headers, sub-heads, and especially hyperlinked text/image content.