unitary transform of image matrix

例句：

1. 1. Theunitary transform method is widely used inimage processing.
   统一变换方法在图像处理中被广泛使用。
2. 2. The unitary transformhas been proven to be more efficient thanother methods.
   统一变换已被证明比其他方法更高效。
3. 3. In the unitary transform, each pixel is transformed independently.
   在统一变换中，每个像素独立地被转换。