Affine.py 文件源码

def AffineScale(scale,new_size,center=None,filter=BILINEAR):
    '''
    Create a simple scale transform.

    @param scale: the amount to scale the image.
    @param new_size: new size for the image.
    @param filter: PIL filter to use.
    '''
    matrix = array([[scale,0,0],[0,scale,0],[0,0,1]],'d')

    scale = AffineTransform(matrix,new_size,filter)
    if center == None:
        return scale
    else:
        return AffineTranslate(center.X(),center.Y(),new_size)*scale*AffineTranslate(-center.X(),-center.Y(),new_size)