Glossary
Searchable terminology from accessibility, web standards, and related fields.
81 results found in computer vision.
- Object Recognition (Object Detection)
- A computer vision capability that identifies and classifies objects within images or video frames. In visual assistance technologies, object recognition enables automated description of what the camer…
- Object Status Recognition (Object State Recognition, Object Transformation Detection)
- The computer vision task of identifying the current condition or transformation state of objects, such as whether an ingredient is raw, chopped, sauteed, or blended. Object status recognition goes bey…
- Optical Music Recognition (OMR)
- Computer vision technology that automatically converts images of printed or handwritten music notation into machine-readable digital formats such as musicXML. OMR is analogous to OCR (Optical Characte…
- 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…
- Pedestrian Detection (Person Detection, Human Detection)
- A computer vision task that identifies and locates people in images or video frames, typically using deep learning models such as convolutional neural networks. In accessibility applications, pedestri…
- Perceptual Hashing (Image Hashing, pHash)
- A technique that generates a compact fingerprint (hash) of an image based on its visual content rather than its raw data. Unlike cryptographic hashes that change completely with any modification, perc…
- Personal Object Recognizer (Teachable Object Recognizer, Custom Object Classifier)
- A computer vision system that allows individual users to train their own object recognition models by providing a small number of example photos and custom labels. Unlike generic object recognizers th…
- Point Cloud
- A set of data points in three-dimensional space, where each point represents a position on the surface of an object or environment, typically captured by depth cameras, LiDAR scanners, or photogrammet…
- Polar Motion Profile (PMP)
- A Polar Motion Profile (PMP) is a computational technique used in sign language detection that models the quantity and distribution of motion relative to a detected face using polar coordinates. The m…
- RANSAC (Random Sample Consensus)
- An iterative algorithm (Fischler and Bolles, 1981) for fitting a mathematical model to data that contains a significant proportion of outliers. In accessibility-focused indoor navigation systems, RANS…
- Scene Classification (Scene Recognition, Scene Understanding)
- Scene classification is a computer vision task that categorizes images or video frames into predefined scene types such as indoor/outdoor, kitchen, office, or street. For accessibility, scene classifi…
- 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. …
- Scene Text Recognition (Scene Text Detection, Text in the Wild, Environmental Text Detection)
- The computer vision task of detecting and reading text that appears naturally in real-world environments, such as street signs, product labels, shop names, and building numbers. Unlike optical charact…
- Screen Recognition
- A computer vision feature in Apple's VoiceOver screen reader that automatically interprets the pixels of a graphical user interface to identify and label interactive elements when applications have no…
- Semantic Segmentation (Pixel-Level Classification, Scene Parsing)
- A computer vision technique that classifies every pixel in an image into a predefined category, producing a detailed map of what objects are present and where they are located. Unlike object detection…
- SigLIP (Sigmoid Loss for Language Image Pre-Training)
- A vision-language model that uses sigmoid loss instead of contrastive loss for aligning images with text descriptions. SigLIP improves upon CLIP by using a more efficient training objective that compu…
- Sign Language Generation (Sign Language Synthesis, Signing Generation)
- The automatic production of sign language content, typically through computer-generated animations of signing avatars or video synthesis. Sign language generation systems convert text or symbolic repr…
- Sign Recognition (Indoor sign recognition, Signage recognition)
- The task of automatically detecting, reading, and interpreting signs in an environment — for accessibility purposes, typically indoor directional signs (arrows pointing to corridors or facilities) and…
- Sign language detection (SL detection, Signing detection)
- The automated identification of whether video content contains sign language communication, using computer vision techniques to analyse motion patterns around detected faces. Sign language detection i…
- Skeleton Tracking (skeletal tracking, body tracking, pose estimation)
- Technology that detects and tracks the positions of human body joints (such as head, shoulders, elbows, hands) in real-time from camera or depth sensor data. In accessibility applications, skeleton tr…