Beispiel #1
0
def imrotate(dat, ang, indexes=None):
	ang=ang % 360
	if ang==0:
		return (dat, None)
	if not indexes:
		ind=transpose(array(nonzero(ones(dat.shape[:2]))))
		s=(dat.shape[0]/2, dat.shape[1]/2)
		rind=ind.astype(float32)-s
		rind=rotate(rind, ang)
		rind=roundtoint(rind)+s
		gi=nonzero(logical_and(all(rind>=(0,0), 1), all(rind<dat.shape[:2],1)))
		ind=ind[gi]
		rind=rind[gi]
		indexes = (ind, rind)
	else:
		ind, rind = indexes
	out=ones_like(dat)*dat.mean()
	out[ind[:,0], ind[:,1], :, :]=dat[rind[:,0], rind[:,1], :, :]
	dat = out
	return (dat, indexes)
Beispiel #2
0
def _halfCos(d, n):
	dat=zeros((n,2), 'f')
	dat[:,0]=sin(pi*arange(n)/float(n))
	dat=rotate(dat, d)
	return dat