Folder: About Images

Thumbnail

What is a Thumbnail? A thumbnail is generally a small image automatically generated by a computer program from a larger image (e.g. a photo) that is supposed to represent the larger image. A thumbnail can also be generated from a video instead of an image, in which case the thumbnail represents the video. In some […]
HiDPI

HiDPI refers to screens with high pixel densities, i.e. high PPI (pixels per pinch), which is also called high DPI (dots per inch).
Pixel Density

The amount of pixels per inch (PPI) that a screen can display.
PPI

Pixels per inch: the amount of pixels of a digital image or physical screen that occupy 1 inch of physical space.
DPI

Dots per inch (or pixels per inch). Term used when measuring the resolution of something, such as digital images, monitor screens, mouses, drawing tablets, and scanners.
Chromatic Aberration

Chromatic aberration is a distortion in photography that creates a "color fringe" effect, typically red, orange or magenta and blue, violet or purple colors.
HSL

Way to represent a color using three numeric values: Hue, Saturation, and Lightness.
Why Every Image Editor has its Own Image Format?

The majority of image editors have their own "native" image format, such as Photoshop's .psd, GIMP's .xcf, and Krita's .kra. Why does this happen?
Alpha

A value that determines the transparency of pixels in a digital image.
Canvas

What is a "Canvas" in an Image Editor? Across various image editors, the term "canvas" is used in contrast with layer to refer to the image composited from all layers combined, and the editable area where it's displayed. In the simplest case, if you open a JPG image and it becomes a single layer, then […]
Layer

What is a "Layer" in Computer Graphics? In image editors, video editors, and computer graphics in general, a "layer" is a digital image or graphical effect that is applied or merged with layers underneath it. The simples example is to have a layer that is a large background image at the bottom, and a second […]
Bits per Pixel

The amount of bits (1's and 0's) necessary to store the color data of a single pixel in a digital image.
Ant-Line

A term for the animated, dashed, black-and-white outline that contours the selected area in an image-editing program when there are pixels selected on the canvas.
Resolution

A term that has two different meanings when talking about digital images, cameras, computer screens, images for printing (DPI), or physical screen space (PPI).
Non-Destructive Editing

Features (and sometimes techniques) in image-editing, photo manipulation, and video-editing applications that allow you to make changes to the original image or footage without losing its original data.
Color Channel

Something like the red, green, and blue channels of a RGB image (plus the alpha channel of a RGBA image).
Pixel Art

A kind of digital art that is created by drawing the pixels of an image one by one.
WebP

Modern image file format that supports both lossy and lossless compression and alpha transparency.
PNG

Common image file format with lossless compression and transparency support.
JPG Artifacts

Distortions in a digital image that appear when you open a JPG file and save it in the JPG format again and again.