ピエロ・デラ・フランチェスカの遠近法(大会報告)

抄録

In Piero della Francesa's description, "De prospectiva pingendi", he says that in painting there are three elements : measurement, drawing and colouring. It is perspective that he means by measurement. He seems to be seeking foreshortening figures by the "Three-plane method", and also to be using the main vanishing point to which 90° lines converge. He treats further a problem on the visual field saying that the visual angle must not be over 90°. In his several works, the main vanishing point is situated on the vertical centre line of the picture plane which is divided into two contrasting spaces, a convex and a concave one. Such a contrasting composition frees these paintings from compositional monotony. The height of eyesight is short, but the distance of eyesight is rather long. Owing to the lowness of the point of sight, we can see there suitable settings for Piero's imposing figures, and the long distance of eyesight, which makes a wide visual field, represses the third dimension. It seems to me that these Piero's perspective compositions give monumental effects to his paintings.