Patent ID: 9565408
Date: 2017-02-07
CPC Classifications: H04N

Claim:
1. A projection apparatus comprising: a projection optical system configured to project projection light on a projection target object; an output display element having an element region including a plurality of pixels that modulate the projection light and configured to generate a projection image configured to be projected on the projection target object based on an input image by a quadrangular effective element region included in the element region; an operation unit configured to acquire an adjustment instruction from a user to adjust the effective element region in the element region; a geometric correction adjustment unit configured to transform the effective element region in the element region to shift a vertex of the effective element region along at least one side of two sides, each of the two sides having one end that is the vertex to be shifted, according to the adjustment instruction input to the operation unit; and a geometric correction unit configured to perform an operation of projecting the input image on the effective element region, wherein when a line in the projection image representing one of the side of the effective element region comes into contact with a vertex of a quadrangular projection target region of the projection target object corresponding to the vertex of the effective element region, the geometric correction adjustment unit transforms the effective element region in the element region to shift the vertex of the effective element region that is one end of the one side, along the one side.