Abstract
In this study, we propose the method for estimating the user's fatigue due to mental load like a desk work based on information of facial expressions. It is, however, difficult to estimate the mental fatigue using ambient sensors information because of a small change of user's appearance. Thus the user's mental fatigue is measured based on his/her facial expression during speech. As experimental results, recognition rate base on facial expression during speech marks higher rate (at most 89%) than that based on facial expression without speech. In addition, we conduct the another experiment for different types of workload, it is confirmed that proposed method is effective for various fatigue.
