| 摘要 |
Image transformation is performed via a video display controlling device. Image data is transformed from an image storage memory having a matrix size of (N+a)x(M+b) onto a display screen sized to display an image according to NxM size matrix. The video display controlling device operates according to any one (or a combination of) several image transformation modes, including a normal mode, an expansion mode, a compression mode, and a moving image mode. These transformations are accomplished by first setting vertical and horizontal addresses of a reference pixel among pixel data stored in the storage memory, and setting an image mode for transforming an original image in a predetermine pattern. Addresses are then generated, in accordance with the set reference pixel and the set image mode, for selecting an NxM set of pixel data from among the (N+a)x(M+b) pixel data in the storage memory.
|
