Topic collection
Images and video
A practical collection for reading image dimensions and choosing settings without guesswork.
Draft answerWhat is aspect ratio?Aspect ratio describes the proportional relationship between an image's width and height.Draft answerWhat is image resolution?Image resolution usually describes an image's pixel dimensions and, for print, how pixels map to physical size.Draft answerWhat is a pixel?A pixel is one sample in the grid used to store and display a digital image.Draft answerWhat is PPI?PPI means pixels per inch and relates an image's pixel grid to a physical size.Draft answerWhat is image resizing?Image resizing changes an image's pixel dimensions or displayed dimensions.Draft answerWhat is image cropping?Image cropping removes pixels from the outer parts of an image to change framing or shape.Draft answerWhat is image compression?Image compression represents image data using fewer bytes, either losslessly or with some discarded information.Draft answerWhat is a JPEG?JPEG is a widely supported lossy image format commonly used for photographs.Draft answerWhat is a PNG?PNG is a lossless raster image format with support for alpha transparency.Draft answerWhat is an SVG?SVG is a text-based open format for describing two-dimensional vector graphics.Draft answerWhat is DPI?DPI means dots per inch and commonly describes the placement of physical printer dots.Draft answerWhat is image transparency?Image transparency allows pixels to reveal some or all of the content behind an image.