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New Technology Allows Androids to Express Emotions More Naturally

Researchers at Osaka University have introduced an innovative technology enabling androids to express a range of mood states—such as “excited” or “sleepy”—through the synthesis of facial movements depicted as superimposed decaying waves.

The reality of human-like androids can be captivating yet a little unsettling. While these robots can exhibit familiar expressions like smiles and frowns, there is often ambiguity surrounding their emotional state. This inconsistency can lead to discomfort, as it is challenging to discern genuine feelings behind these artificial displays.

Historically, androids that could move multiple facial parts utilized a method known as the ‘patchwork method’ for displaying emotions. This involved preparing a set of predetermined facial expressions to avoid awkward movements when switching between different scenarios. However, this approach presents hurdles, notably the need for detailed prior arrangements and ensuring that transitions between movements appear natural and seamless.

In response to these challenges, Hisashi Ishihara and his team developed a novel method of dynamic facial expression synthesis that employs “waveform movements.” This technique treats gestures associated with facial expressions—like “breathing,” “blinking,” and “yawning”—as individual waveform signals. These signals are woven together and activated in real time, allowing for a fluid performance of complex facial movements without the need for extensive pre-loaded action data or jarring transitions.

The innovation extends further with the concept of “waveform modulation,” which enables adjustments to individual waveforms based on the android’s internal state. This means that changes in the robot’s mood can be quickly reflected in its facial expressions, enhancing the immediacy and relevance of its emotional communication.

Koichi Osuka, a senior author of the study, remarks, “This research advancement allows robots capable of intricate facial movements to showcase more dynamic expressions and adapt their emotions according to their environment, especially in interactions with humans. This leap could significantly enhance emotional exchanges between people and robots.”

Ishihara emphasizes the potential for future developments: “The goal is to create a system where an android’s internal emotions are intricately reflected in its actions, potentially leading to the creation of androids that are perceived as having true emotional depth.”

The ability to flexibly modify and project emotions through this new technology holds the promise to significantly improve the effectiveness of communication robots, enabling them to engage with people in a manner that feels intuitive and natural.

Source
www.sciencedaily.com