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In the recent years, a development of the Internet and information technique is enable to use IT devices in an ordinary classroom. One of them is videoing with a camera. We decided to take a video of a lecture with information about students who is taking part in it. The proposed system takes a video so that student's face comes to the front. The system extracts a rectangle around each student from each frame in the video. It estimates state of student by using the face detection technique and the flesh color detection one. The system assumes the flesh color of Japanese people. In this paper, we describes a method detecting dozing students. A simple experiment is performed with 90-minute lecture. In the experimental result, state of student is effectively estimated. The system takes a class with a single camera and detects dozing of multiple people.

Santaraksita quotes many views insisting upon the realistic existence of the external object and points out their absurdity in Bahirarthapariksa or 'the examination of the external object', Tattvasamgraha. It seems that the arguments are mainly divided into two classes: one is on the atom (paramanu) theory and the other is on the cognition (vi jnana) theory. Of these, I will treat here with the latter subject, especially, svasamvedana or ' self-cognition' of cognition, which forms one of the most important characteristics o the viJnana-system in this chapter of Zattvasamgraha. I suppose that we are able to understand the meaning of svasamvedana through seeing the realistic assertion of Kumarila and Santaraksita's refutation to it. In Tattvasamgraha, there are quoted a lots of verses from Sunyavada and Niralambanavada, Slokavarttika of Kumarila. In this Bahirarthapariksa also mainly there quoted a few verses from Sanyavada and (1) criticized thoroughly by Santaraksita.

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