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Semantic Segmentation

Assigning a class label to each pixel in an image, delineating objects by their semantic meaning.
Definition

Semantic Segmentation is a computer vision task that involves dividing an image into segments or regions and labeling each pixel within those segments according to the type of object or class it belongs to. Unlike object detection, which identifies and locates objects within bounding boxes, semantic segmentation provides a pixel-level classification, resulting in a detailed understanding of the scene.

Each pixel is classified into predefined categories, such as "road", "car", "pedestrian", or "sky", making this technique particularly useful for applications that require a comprehensive understanding of the entire scene and its components. Semantic segmentation models are typically based on deep learning architectures, such as Convolutional Neural Networks (CNNs) and Fully Convolutional Networks (FCNs), which are trained on large datasets with pixel-level annotations.

Examples/Use Cases:

In autonomous driving systems, semantic segmentation is used to understand the driving environment by classifying all pixels in real-time video frames into categories such as road, vehicles, pedestrians, and traffic signs, enabling the vehicle to navigate safely. In medical imaging, semantic segmentation can be applied to segment different anatomical structures or areas of interest in medical scans, such as segmenting tumors from healthy tissue in MRI or CT scans, aiding in diagnosis and treatment planning.

In agricultural applications, semantic segmentation can be used in aerial imagery to classify different types of crops, assess crop health, and manage resources more efficiently. These examples demonstrate the critical role of semantic segmentation in enabling detailed and context-aware analysis of images across various domains, contributing to advancements in AI-driven technologies and applications.

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