Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Symmetry01:26

Symmetry

41
The equation of an ellipse centered at the origin defines all points whose distances from the center maintain a constant ratio between the horizontal and vertical axes. This equation results in a smooth, closed curve that extends further along the x-axis than the y-axis, giving it a horizontal orientation. Such an ellipse demonstrates three kinds of symmetry: across the x-axis, across the y-axis, and about the origin. These symmetries are essential in understanding the graph's structure and...
41
Areas Within Irregular Boundaries01:26

Areas Within Irregular Boundaries

175
Calculating areas within irregular boundaries, such as along rivers or curved roads, is crucial in various fields, including surveying, engineering, and environmental management. Surveyors often begin by creating a traverse, a connected series of straight lines approximating the area's boundary. The coordinates of each traverse point are essential for calculating the enclosed area. The double meridian distance formula is a widely used technique for this purpose. This method utilizes the...
175
Curvilinear Motion: Rectangular Components01:23

Curvilinear Motion: Rectangular Components

837
Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...
837
Rectangular and Triangular Pulse Function01:19

Rectangular and Triangular Pulse Function

1.4K
The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
1.4K
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

8.9K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
8.9K
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

8.7K
A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
8.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Momentum-dependent multiple gaps in magnesium diboride probed by electron tunnelling spectroscopy.

Nature communications·2012
Same author

Effect of antisense oligodeoxynucleotide targeted against NF-κB/P65 on cell proliferation and tumorigenesis of gastric cancer.

Clinical and experimental medicine·2012
Same author

Innate immunity alone is not sufficient for chronic rejection but predisposes healed allografts to T cell-mediated pathology.

Transplant immunology·2012
Same author

Electroacupuncture improves survival in rats with lethal endotoxemia via the autonomic nervous system.

Anesthesiology·2012
Same author

Single-incision laparoscopic Roux-en-Y hepaticojejunostomy using conventional instruments for children with choledochal cysts.

Surgical endoscopy·2011
Same author

Coherent spin precession via photoinduced antiferromagnetic interactions in La0.67Ca0.33MnO3.

Physical review letters·2011

Related Experiment Video

Updated: Nov 9, 2025

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
06:25

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing

Published on: February 23, 2024

830

A Geometric Framework for Rectangular Shape Detection.

Qi Li

    IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
    |July 30, 2014
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new geometric framework for detecting rectangular shapes in RGB images. The method effectively handles outliers, open shapes, and fragmentation for improved accuracy in applications like vehicle detection.

    More Related Videos

    Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
    10:56

    Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

    Published on: March 6, 2014

    12.8K
    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
    13:44

    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

    Published on: August 30, 2013

    43.2K

    Related Experiment Videos

    Last Updated: Nov 9, 2025

    Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
    06:25

    Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing

    Published on: February 23, 2024

    830
    Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
    10:56

    Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

    Published on: March 6, 2014

    12.8K
    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
    13:44

    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

    Published on: August 30, 2013

    43.2K

    Area of Science:

    • Computer Vision
    • Image Processing
    • Geometric Modeling

    Background:

    • Rectangular shape detection is crucial for applications like license plate, vehicle, and building recognition.
    • Existing methods face challenges with outliers, open shapes, and fragmented edge data.

    Purpose of the Study:

    • To propose a novel geometric framework for robust rectangular shape detection in RGB images.
    • To address key limitations in candidate shape analysis: outliers, open shapes, and fragmentation.

    Main Methods:

    • A geometric framework operating in the channel-scale space of RGB images.
    • Algorithms specifically designed to mitigate issues of outliers, open shapes, and fragmentation in candidate shapes.
    • Integration of imbalanced points to develop an interestness measure for rectangular shapes.

    Main Results:

    • The proposed framework demonstrates a promising approach to overcoming common challenges in rectangular shape detection.
    • Experimental validation indicates the effectiveness of the developed algorithms in identifying rectangular structures.

    Conclusions:

    • The novel geometric framework offers a robust solution for detecting rectangular shapes.
    • The method shows potential for enhancing the performance of various computer vision applications reliant on shape detection.