Alpha Channel
A color component that represents the degree of transparency or opacity of a pixel in an image.
Aspect Ratio
The proportional relationship between the width and height of an image, commonly expressed as two numbers separated by a colon (e.g., 16:9).
AVIF
AV1 Image File Format. A modern, open-source image format based on the AV1 video codec that provides superior compression and quality.
Bilinear Filtering
A texture filtering method used to smooth textures when displayed larger or smaller than they actually are.
Bit Depth
The number of bits used to represent the color of a single pixel. Higher bit depth allows for more colord and smoother gradients.
Compression Ratio
The ratio between the size of the uncompressed image data and the size of the compressed data.
DPI (Dots Per Inch)
A measure of spatial printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch.
EXIF Data
Exchangeable Image File Format. Metadata stored within image files that includes camera settings, date, time, and sometimes location.
JPEG (Joint Photographic Experts Group)
A widely used lossy compression format for digital images, particularly those produced by digital photography.
Lossless Compression
A class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data.
Lossy Compression
A data encoding method that uses inexact approximations and partial data discarding to represent the content, significantly reducing file size.
Metadata
Data about data. In images, this includes EXIF, IPTC, and XMP information about how and when the image was created.
PNG (Portable Network Graphics)
A raster-graphics file format that supports lossless data compression and transparency.
PPI (Pixels Per Inch)
The number of pixels per inch in a digital image or display, determining the visual sharpness of the content.
Raster Graphics
Digital images created from a grid of pixels (like JPEG or PNG), as opposed to vector graphics created from mathematical paths.
Resolution
The number of pixels in an image, typically expressed as width x height (e.g., 1920x1080).
SVG (Scalable Vector Graphics)
An XML-based vector image format for two-dimensional graphics with support for interactivity and animation.
Thumbnail
A small-scale representation of a larger image, used to help users quickly browse and recognize content.
Vector Graphics
Images defined by mathematical equations (points, lines, curves) instead of pixels, allowing for infinite scaling without quality loss.
WebP
A modern image format developed by Google that provides both lossy and lossless compression, designed for the web.