J

JPEG (Joint Photographic Experts Group)

A lossy-compression file format that supports 24-bit color and is used to preserve the tonal variations in photographs. JPEG compresses file size by selectively discarding data. JPEG compression can degrade sharp detail in images and is not recommended for images with type or solid areas of color. JPEG does not support transparency. When you save an image as a JPEG, transparency is replaced by the matte color. See also matting .