Glossary
Searchable terminology from accessibility, web standards, and related fields.
81 results found in computer vision.
- Frame differencing (Temporal differencing, Background subtraction)
- A computer vision technique that detects motion or changes in video by comparing consecutive frames pixel by pixel. In accessibility applications, frame differencing can identify instructor actions in…
- Head Pose Estimation (Head Orientation Detection, Gaze Direction Estimation)
- A computer vision technique that determines the orientation or direction a person's head is facing, typically classifying whether someone is looking towards or away from the camera. In accessibility c…
- Image Captioning (Automatic Image Description, AI Image Description)
- A computer vision task in which an AI model generates a natural language description of the content of an image. In accessibility contexts, image captioning technology enables visually impaired users …
- Image Classification (Visual Classification, Photo Classification)
- A computer vision task where a machine learning model assigns a category label to an input image based on its visual content. Image classifiers are trained on labeled example images and learn to recog…
- Image Retrieval (Content-Based Image Retrieval, CBIR, Visual Search)
- A computer vision technique that searches a database of images to find ones similar to a query image based on visual features rather than text metadata. In accessibility applications, image retrieval …
- Image Stitching (Photo Stitching, Panoramic Stitching)
- A computer vision technique that combines multiple overlapping photographs into a single wider or panoramic image. In accessibility contexts, image stitching enables blind users to capture more visual…
- ImageNet
- ImageNet is a large-scale visual database containing over 14 million labeled images organized into thousands of categories, widely used for training and benchmarking computer vision models. Many objec…
- Instance Segmentation
- A computer vision technique that identifies and delineates individual objects within an image at the pixel level, distinguishing separate instances even when they belong to the same category. In acces…
- Instance-Level Recognition (Instance Recognition, Fine-Grained Recognition)
- A computer vision task that involves distinguishing between specific individual objects within the same general category, rather than just identifying broad categories. For example, while category-lev…
- Isolated Sign Recognition (ISR, ISLR)
- A computer vision and machine learning task focused on identifying individual signs from video recordings where each video contains a single sign production, as opposed to continuous sign language rec…
- K-Shot Learning (N-Way K-Shot Learning)
- A machine learning paradigm where a model must learn to classify objects using only k training examples per class. In the context of accessibility, k-shot learning is significant because it enables as…
- Key Frame Extraction (Keyframe Selection, Key Frame Selection)
- A computer vision technique that automatically identifies and selects the most representative or highest-quality frames from a continuous video stream. In accessibility contexts, key frame extraction …
- 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…
- Landmark Extraction (Keypoint Detection, Skeletal Tracking)
- A computer vision technique that identifies and tracks specific anatomical points (landmarks or keypoints) on the human body, hands, and face from images or video. In sign language technology, landmar…
- Meal Assistance Technology (Dining Assistance Technology, Food Accessibility Technology)
- Assistive technologies designed to help people with disabilities identify, locate, and consume food independently during mealtimes. For people with visual impairments, these systems may use computer v…
- MediaPipe
- An open-source framework by Google for building multimodal machine learning pipelines, commonly used for real-time face, hand, and body tracking. In accessibility applications, MediaPipe Holistic extr…
- Microsoft Kinect (Kinect, Kinect sensor)
- A motion-sensing device that captures RGB video, depth images, and skeletal tracking data simultaneously. Originally developed for gaming, the Kinect became widely adopted in accessibility research du…
- Motion Capture (MoCap, Movement Tracking)
- Technology that records the movements of people or objects, typically using cameras, sensors, or computer vision, and translates them into digital data for animation or analysis. In sign language appl…
- Multimodal Features (multimodal data, multimodal fusion)
- Information extracted from multiple sensory channels or data types—such as combining visual (RGB), depth, audio, and skeletal data—to improve recognition accuracy. In accessibility systems, multimodal…
- Object Detection (Object Recognition)
- A computer vision technique that identifies and locates specific objects within images or video frames, typically by drawing bounding boxes around detected items and classifying them. In video accessi…