Glossary
Searchable terminology from accessibility, web standards, and related fields.
8 results found in video processing.
- Background Blur (Depth of Field Effect, Bokeh Effect)
- A visual technique that applies a blur filter to the background of a video while keeping foreground subjects in sharp focus, similar to a shallow depth-of-field camera effect. In accessibility context…
- Background Subtraction (Foreground-Background Separation, Background Modelling)
- Background subtraction is a computer vision technique used to identify moving objects (the foreground) in a video by comparing each frame against a model of the static background. Common approaches in…
- Gaussian Blur (Gaussian Filter)
- An image processing technique that smooths an image by averaging pixel values using a Gaussian (bell-curve) weighted function, creating a soft, out-of-focus appearance. In video accessibility, Gaussia…
- Keyframe (Key Frame)
- A keyframe is a single representative frame selected from a video scene or shot that best captures the essential visual content of that segment. In automated audio description and video captioning sys…
- Overlay Detection (Overlay Recognition)
- The process of automatically identifying graphical or textual elements overlaid on top of video content, such as pop-up graphics, watermarks, banners, subtitles, logos, and text annotations. Overlay d…
- Scene Segmentation (Scene Detection, Shot Boundary Detection)
- Scene segmentation is the process of automatically dividing a video into discrete scenes or segments based on visual changes such as cuts, transitions, or the appearance of new elements in the frame. …
- Speaker Segmentation (Person Segmentation, Human Segmentation)
- The process of identifying and isolating the speaker or presenter in a video frame, separating them from the background and other visual elements. Speaker segmentation uses computer vision models to c…
- Video Inpainting (Video Fill, Content-Aware Video Fill)
- A computer vision technique that fills in removed or missing regions of a video frame with plausible content generated based on surrounding visual information. Video inpainting is used in accessibilit…