Patent ID: 7528841

Claim:
An image transformation apparatus comprising: modeling means which calculate, with respect to a model to which an image is attached, the coordinates of vertices of each polygon and calculate a pre-filter coefficient corresponding to a reduction ratio at the position of a vertex of each polygon; read address setting means which convert the coordinates of vertices of each polygon calculated by said modeling means into the coordinates of each pixel and which set a read address for attaching an image to said model using said coordinates of each pixel; pre-filter coefficient conversion means which convert a pre-filter coefficient calculated by said modeling means into a pre-filter coefficient at the position of each pixel; pre-filter processing means which perform filtering on input image data with a pre-filter coefficient obtained through conversion by said pre-filter coefficient conversion means; image storage means to which image data filtered by said pre-filter processing means is written; readout means which read out image data from said image memory means in accordance with a read address set by said read address setting means; and address storage means to which a read address set in said read address setting means is written with video data being input to said pre-filter processing means, and from which the read address is read out by one frame based on a synchronous signal input along with said video data; wherein said readout means read out image data from said image storage means in accordance with a read address read out from said address storage means, wherein resolution of said coordinates of each pixel in said read address setting means is higher than that of said input video data, and wherein resolution of said position of each pixel in said pre-filter coefficient conversion means is equal to that of said input video data.