Related Experiment Video
Updated: May 17, 2026
09:41
Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
Published on: April 21, 2023
Description of the human hand grasp using graph theory
1Robotics Institute, Beihang University, Beijing 100191, China.
Medical Engineering & Physics
|November 3, 2012
Summary
This study introduces a novel method for analyzing human hand grasp postures, detailing finger actions and movements. The approach uses graph theory and matrices to represent hand-object interactions for grasping analysis.
Area of Science:
- Robotics
- Biomechanics
- Human-Computer Interaction
Background:
- Understanding human hand grasp is crucial for robotics and prosthetics.
- Existing methods lack a comprehensive approach to finger-specific grasp analysis.
Purpose of the Study:
- To present a systematic method for describing and analyzing human hand grasp postures.
- To identify active fingers and their required degrees of freedom during grasping.
Main Methods:
- Utilizing human hand tree graphs and incidence matrices.
- Employing grasp contact graphs and basic cycle matrices (identity and Bf12 matrices).
- Applying VF-trees to analyze the Bf12 matrix for finger activity and degrees of freedom.
Main Results:
- The method successfully describes human hand and object interactions.
- VF-trees effectively indicate active fingers and their required movements.
- Validation through analysis of six basic human hand grasp postures.
Conclusions:
- The proposed method provides a robust framework for analyzing grasp postures.
- This approach can inform the design of advanced robotic hands and prosthetics.
Related Concept Videos
01:28Graphical Representation of Inequalities
The graph of the equation where y equals x squared forms a curve known as a parabola. This curve acts as a boundary in the coordinate plane, dividing it into distinct regions based on the relative position of points.When the equality sign in the equation is replaced with an inequality—such as greater than, less than, greater than or equal to, or less than or equal to—the graphical representation changes from a single curve into a broader shaded area that signifies the set of all points...
01:30Graphs of Functions
Graphs of functions provide a visual representation of how output values change in response to varying inputs. Each point on the graph corresponds to an ordered pair, where the x-coordinate (independent variable) determines the horizontal position and the y-coordinate (dependent variable) determines the vertical position. Linear functions like y = x give a straight line, indicating a constant rate of change.Nonlinear functions display more complex behaviors. Even power functions generate...
01:10Vector Algebra: Graphical Method
Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
01:30Graphs of Equations in Two Variables
An equation with two variables, typically written in the form y = f(x) or Ax + By = C, describes a relationship between quantities represented by x and y. Each solution to such an equation is an ordered pair (x, y) that satisfies the equation when substituted. These pairs can be represented graphically to understand the variables' relationship visually.A common technique for constructing the graph of a two-variable equation is to create a value table. Begin by choosing several values for the...
01:17Graphs of Polar Equations
The polar coordinate system represents points using a distance from a central point (the pole) and an angle from a reference direction (the polar axis). Unlike rectangular coordinates, polar coordinates are ideal for graphing curves with radial symmetry or periodic behavior.Some general forms of graphs in polar coordinates include the following:Equation of a Circle (Centered at the Pole):A graph where the radius remains constant for all angles traces a circle centered at the pole:Equation of a...
01:30Graphs of Trigonometric Functions
Trigonometric functions exhibit periodic and symmetrical behavior, deeply rooted in the unit circle. The sine and cosine functions correspond to the vertical and horizontal projections, respectively, of a point rotating counterclockwise around the circle. These functions trace smooth, repeating waveforms with identical periods and bounded ranges. The tangent function is defined as the ratio of sine to cosine and produces an unbounded curve that repeats every units, with vertical asymptotes...