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Related Concept Videos

Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

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Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
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Structural Joints: Fibrous Joints01:03

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Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
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Structural Joints: Cartilaginous Joints01:17

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As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
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Joints01:26

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Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
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Fibrous Joints Are Immovable
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Velocity of an Object01:18

Velocity of an Object

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Understanding how an object moves along a path requires distinguishing between motion over a time span and motion at a precise moment. A useful example is a vehicle traveling along a straight and level path, where its position at any given time is known. The initial step in analyzing this motion is to measure how far the vehicle travels over a fixed time period. This measurement, called average velocity, is computed by dividing the total change in position by the duration over which the change...
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Space Trusses01:25

Space Trusses

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A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. The space truss is widely used in various construction projects due to its adaptability and capacity to withstand complex loads.
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
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Exemplar-aided Salient Object Detection via Joint Latent Space Embedding.

Yuqiu Kong, Jianming Zhang, Huchuan Lu

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    This study introduces an exemplar-aided approach for salient object detection, enhancing unsupervised methods with minimal data. The technique effectively transfers visual information using a few examples, achieving performance comparable to supervised models.

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    Area of Science:

    • Computer Vision
    • Artificial Intelligence
    • Image Processing

    Background:

    • Unsupervised salient object detection relies on potentially insufficient pre-defined saliency assumptions.
    • Supervised methods require extensive, costly annotated datasets.

    Purpose of the Study:

    • To propose an exemplar-aided salient object detection method.
    • To complement heuristic saliency assumptions using few exemplar images.
    • To address the challenge of differing appearances between query and exemplar images.

    Main Methods:

    • Learning intra-class instance matching in a latent embedding space online.
    • Joint latent embedding of image superpixels.
    • Transferring foreground and background information from a reference image to a test image.

    Main Results:

    • Significant performance improvement for existing unsupervised salient object detection methods.
    • Effective utilization of very small reference image datasets (e.g., one image).
    • Competitive performance compared to fully supervised methods.

    Conclusions:

    • The proposed exemplar-aided method effectively enhances unsupervised salient object detection.
    • The approach offers a cost-effective alternative to fully supervised methods.
    • It demonstrates robustness across varied image content and contexts.