Printed using a 3D printer to print plastic ducks and duck with another 3D printer may look the same, but the feel, or feels is not necessarily the same. Today, in order to help designers create replicas that look the same or feel the same, researchers have developed a way to predict the perception of softness and stiffness for 3D objects.
David Levin, associate researcher at Disney Research, explains that this ability is important for creating consistently comfortable garments, toys, and other objects that need to function in a predictable, interchangeable way.
To this end, researchers have built perceptual models for nonlinear elastic objects—these objects change stiffness based on how much they are compressed. It is understood that this model is based on the results of a series of experiments in which people need to poke a few 3D printed materials and compare their feelings.
It is reported that the researchers of this project are from Kennedy Research Center, Massachusetts Institute of Technology, Max Planck Institute of Informatics, Saarland University, Comenius University and Harvard University. On July 24th, the research team will attend the ACM International Conference on Computer Graphics and Interaction Technology (SIGGRAPH) in Anaheim, California, and publish their models.
“The perception of material softness is a complex phenomenon and cannot be determined simply by measuring how much deformation the object has produced after how much force has been applied,†said Jessica Hodgins, vice president of the Disney Research Center. “People usually use a lot of Clues to judge softness, including texture, size, and location, so it is critical to build models based on human perception. The research team has been able to use these input conditions to accurately predict the various materials and geometric objects. People's feelings."
Although 3D printers can produce objects of the same shape, not all 3D printers use the same raw materials or processes, which means they do not always produce objects with the same feel, assistant professor at the MIT School of Electrical Engineering and Computer Science. Wojciech Matusik said. But by changing the internal structure of the object, researchers have been able to customize the response of an object to pinching and licking.
A perceptual model can guide this process, allowing users to create objects with the same feel using different 3D printers and different materials, he added.
When developing the model, the researchers physically measured how the 12 sample materials were deformed and how 20 people felt about the material. Everyone involved in the experiment was asked to evaluate the three parts of the material at a time, each time representing 78 such attempts, and eventually produced 1,560 comparison results.
Since the shape also affects the feel of the object, the application of the model goes beyond the scope of simple shapes, including more complex geometries. To verify the effect of the extension, the researchers performed a displacement test on a plastic duck, and the testee was asked to touch the same subject and evaluate based on the different points on the body—head, tip, body, and tail. Their feelings.
In the test, the model can accurately predict the most different objects selected by the participants based on their perceptions, thus verifying the entire model.
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