10月12日，日本山口大学１２日发表公报称，该校一个研究小组通过试验证实，人脑存在处理二维图案不规则性的机制。该成果有望在人工智能等领域促进图像识别和图像合成技术发展。
日本山口大学时间学研究所教授宫崎真、助教山田佑树和ＮＴＴ通信科学基础研究所研究员河边隆宽率领的研究小组，招募了２０名成年志愿者进行试验。他们先让受试者观看由黑点组成的毫无规则的图案Ａ，５秒后再观看同样由黑点组成的凌乱程度稍弱的图案Ｂ以及有规则的图案Ｃ。结果发现，受试者会觉得后两者非常相像。
研究小组指出，出现这种情况是由于人脑适应了图案Ａ之后，对于图案不规则性的看法发生改变，即大脑内对不规则图案信息产生了“残留效果”，这表明大脑内存在专门处理这类信息的机制。
相关论文已刊登在新一期英国学术杂志《科学报告》上。(生物谷：Bioon.com)
生物谷推荐英文摘要：
Scientific Reports doi:10.1038/srep02906
Pattern randomness aftereffect
Yuki Yamada,Takahiro Kawabe & Makoto Miyazaki
Humans can easily discriminate a randomly spaced from a regularly spaced visual pattern. Here, we demonstrate that observers can adapt to pattern randomness. Following their adaption to prolonged exposure to two-dimensional patterns with varying levels of physical randomness, observers judged the randomness of the pattern. Perceived randomness decreased (increased) following adaptation to high (low) physical randomness (Experiment 1). Adaptation to 22.5°-rotated adaptor stimuli did not cause a randomness aftereffect (Experiment 2), suggesting that positional variation is unlikely to be responsible for the pattern randomness perception. Moreover, the aftereffect was not selective to contrast polarity (Experiment 3) and was not affected by spatial jitter (Experiment 4). Last, the aftereffect was not affected by adaptor configuration (Experiment 5). Our data were consistent with a model assuming filter-rectify-filter processing for orientation inputs. Thus, we infer that neural processing for orientation grouping/segregation underlies the perception of pattern randomness.
