def test_cuda():
import numpy
import matplotlib.pyplot
# load example image
import pkg_resources
## Define the source of data
DATA_PATH = pkg_resources.resource_filename('pynufft', 'src/data/')
# PHANTOM_FILE = pkg_resources.resource_filename('pynufft', 'data/phantom_256_256.txt')
import scipy
image = scipy.misc.ascent()
image = scipy.misc.imresize(image, (256, 256))
image = image.astype(numpy.float) / numpy.max(image[...])
Nd = (256, 256) # image space size
Kd = (512, 512) # k-space size
Jd = (6, 6) # interpolation size
# load k-space points as M * 2 array
om = numpy.load(DATA_PATH + 'om2D.npz')['arr_0']
# Show the shape of om
print('the shape of om = ', om.shape)
# initiating NUFFT_cpu object
nfft = NUFFT_cpu() # CPU NUFFT class
# Plan the nfft object
nfft.plan(om, Nd, Kd, Jd)
# initiating NUFFT_hsa object
NufftObj = NUFFT_hsa('cuda', 0, 0)
# Plan the NufftObj (similar to NUFFT_cpu)
NufftObj.plan(om, Nd, Kd, Jd)
import time
t0 = time.time()
for pp in range(0, 10):
y = nfft.forward(image)
t_cpu = (time.time() - t0) / 10.0
## Moving image to gpu
## gx is an gpu array, dtype = complex64
gx = NufftObj.to_device(image)
t0 = time.time()
for pp in range(0, 100):
gy = NufftObj.forward(gx)
t_cu = (time.time() - t0) / 100
print('t_cpu = ', t_cpu)
print('t_cuda =, ', t_cu)
print('gy close? = ',
numpy.allclose(y, gy.get(), atol=numpy.linalg.norm(y) * 1e-3))
print("acceleration=", t_cpu / t_cu)
maxiter = 100
import time
t0 = time.time()
x_cpu_cg = nfft.solve(y, 'cg', maxiter=maxiter)
# x2 = nfft.solve(y2, 'L1TVLAD',maxiter=maxiter, rho = 2)
t1 = time.time() - t0
# gy=NufftObj.thr.copy_array(NufftObj.thr.to_device(y2))
t0 = time.time()
x_cuda_cg = NufftObj.solve(gy, 'cg', maxiter=maxiter)
# x = NufftObj.solve(gy,'L1TVLAD', maxiter=maxiter, rho=2)
t2 = time.time() - t0
print(t1, t2)
print('acceleration of cg=', t1 / t2)
t0 = time.time()
x_cpu_TV = nfft.solve(y, 'L1TVOLS', maxiter=maxiter, rho=2)
t1 = time.time() - t0
t0 = time.time()
x_cuda_TV = NufftObj.solve(gy, 'L1TVOLS', maxiter=maxiter, rho=2)
t2 = time.time() - t0
print(t1, t2)
print('acceleration of TV=', t1 / t2)
matplotlib.pyplot.subplot(2, 2, 1)
matplotlib.pyplot.imshow(x_cpu_cg.real, cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('CG_cpu')
matplotlib.pyplot.subplot(2, 2, 2)
matplotlib.pyplot.imshow(x_cuda_cg.get().real, cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('CG_cuda')
matplotlib.pyplot.subplot(2, 2, 3)
matplotlib.pyplot.imshow(x_cpu_TV.real, cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('TV_cpu')
matplotlib.pyplot.subplot(2, 2, 4)
matplotlib.pyplot.imshow(x_cuda_TV.get().real, cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('TV_cuda')
matplotlib.pyplot.show()
NufftObj.release()
del NufftObj
def test_opencl_multicoils():
import numpy
import matplotlib.pyplot
# load example image
import pkg_resources
## Define the source of data
DATA_PATH = pkg_resources.resource_filename('pynufft', 'src/data/')
# PHANTOM_FILE = pkg_resources.resource_filename('pynufft', 'data/phantom_256_256.txt')
import scipy
image = scipy.misc.ascent()[::2, ::2]
image = image.astype(numpy.float) / numpy.max(image[...])
Nd = (256, 256) # image space size
Kd = (512, 512) # k-space size
Jd = (6, 6) # interpolation size
# load k-space points as M * 2 array
om = numpy.load(DATA_PATH + 'om2D.npz')['arr_0']
# Show the shape of om
print('the shape of om = ', om.shape)
batch = 8
# initiating NUFFT_cpu object
nfft = NUFFT_cpu() # CPU NUFFT class
# Plan the nfft object
nfft.plan(om, Nd, Kd, Jd, batch=batch)
# initiating NUFFT_hsa object
try:
NufftObj = NUFFT_hsa('cuda', 0, 0)
except:
try:
NufftObj = NUFFT_hsa('ocl', 1, 0)
except:
NufftObj = NUFFT_hsa('ocl', 0, 0)
# Plan the NufftObj (similar to NUFFT_cpu)
NufftObj.plan(om, Nd, Kd, Jd, batch=batch, radix=2)
coil_sense = numpy.ones(Nd + (batch, ), dtype=numpy.complex64)
for cc in range(0, batch, 2):
coil_sense[int(256 / batch) * cc:int(256 / batch) * (cc + 1), :,
cc].real *= 0.1
coil_sense[:, int(256 / batch) * cc:int(256 / batch) * (cc + 1),
cc].imag *= -0.1
NufftObj.set_sense(coil_sense)
nfft.set_sense(coil_sense)
y = nfft.forward_one2many(image)
import time
t0 = time.time()
for pp in range(0, 2):
xx = nfft.adjoint_many2one(y)
t_cpu = (time.time() - t0) / 2
## Moving image to gpu
## gx is an gpu array, dtype = complex64
gx = NufftObj.to_device(image)
gy = NufftObj.forward_one2many(gx)
t0 = time.time()
for pp in range(0, 10):
gxx = NufftObj.adjoint_many2one(gy)
t_cu = (time.time() - t0) / 10
print(y.shape, gy.get().shape)
print('t_cpu = ', t_cpu)
print('t_cuda =, ', t_cu)
print('gy close? = ',
numpy.allclose(y, gy.get(), atol=numpy.linalg.norm(y) * 1e-6))
print('gy error = ',
numpy.linalg.norm(y - gy.get()) / numpy.linalg.norm(y))
print('gxx close? = ',
numpy.allclose(xx, gxx.get(), atol=numpy.linalg.norm(xx) * 1e-6))
print('gxx error = ',
numpy.linalg.norm(xx - gxx.get()) / numpy.linalg.norm(xx))
# for bb in range(0, batch):
matplotlib.pyplot.subplot(1, 2, 1)
matplotlib.pyplot.imshow(xx[...].real, cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('Adjoint_cpu_coil')
matplotlib.pyplot.subplot(1, 2, 2)
matplotlib.pyplot.imshow(gxx.get()[...].real, cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('Adjoint_hsa_coil')
# matplotlib.pyplot.subplot(2, 2, 3)
# matplotlib.pyplot.imshow( x_cpu_TV.real, cmap= matplotlib.cm.gray)
# matplotlib.pyplot.title('TV_cpu')# x_cuda_TV = NufftObj.solve(gy,'L1TVOLS', maxiter=maxiter, rho=2)
# matplotlib.pyplot.subplot(2, 2, 4)
# matplotlib.pyplot.imshow(x_cuda_TV.get().real, cmap= matplotlib.cm.gray)
# matplotlib.pyplot.title('TV_cuda')
matplotlib.pyplot.show(block=False)
matplotlib.pyplot.pause(1)
matplotlib.pyplot.close()
print("acceleration=", t_cpu / t_cu)
maxiter = 100
import time
t0 = time.time()
x_cpu_cg = nfft.solve(y, 'cg', maxiter=maxiter)
# x2 = nfft.solve(y2, 'L1TVLAD',maxiter=maxiter, rho = 2)
t1 = time.time() - t0
# gy=NufftObj.thr.copy_array(NufftObj.thr.to_device(y2))
t0 = time.time()
x_cuda_cg = NufftObj.solve(gy, 'cg', maxiter=maxiter)
# x = NufftObj.solve(gy,'L1TVLAD', maxiter=maxiter, rho=2)
print('shape of cg = ', x_cuda_cg.get().shape, x_cpu_cg.shape)
t2 = time.time() - t0
print(t1, t2)
print('acceleration of cg=', t1 / t2)
t0 = time.time()
# x_cpu_TV = nfft.solve(y, 'L1TVOLS',maxiter=maxiter, rho = 2)
t1 = time.time() - t0
t0 = time.time()
# x_cuda_TV = NufftObj.solve(gy,'L1TVOLS', maxiter=maxiter, rho=2)
t2 = time.time() - t0
print(t1, t2)
# print('acceleration of TV=', t1/t2 )
# try:
for bb in range(0, batch):
matplotlib.pyplot.subplot(2, batch, 1 + bb)
matplotlib.pyplot.imshow(x_cpu_cg[..., bb].real,
cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('CG_cpu_coil_' + str(bb))
matplotlib.pyplot.subplot(2, batch, 1 + batch + bb)
matplotlib.pyplot.imshow(x_cuda_cg.get()[..., bb].real,
cmap=matplotlib.cm.gray)
matplotlib.pyplot.title('CG_hsa_coil_' + str(bb))
# matplotlib.pyplot.subplot(2, 2, 3)
# matplotlib.pyplot.imshow( x_cpu_TV.real, cmap= matplotlib.cm.gray)
# matplotlib.pyplot.title('TV_cpu')# x_cuda_TV = NufftObj.solve(gy,'L1TVOLS', maxiter=maxiter, rho=2)
# matplotlib.pyplot.subplot(2, 2, 4)
# matplotlib.pyplot.imshow(x_cuda_TV.get().real, cmap= matplotlib.cm.gray)
# matplotlib.pyplot.title('TV_cuda')
matplotlib.pyplot.show()
# except:
# print('no matplotlib')
NufftObj.release()
del NufftObj
numpy.random.seed(0)
om = numpy.random.randn(int(5e+5), 3)
print(om.shape)
from pynufft import NUFFT_cpu, NUFFT_hsa, NUFFT_hsa_legacy
NufftObj = NUFFT_hsa(API='ocl', platform_number=1, device_number=0)
NufftObj.plan(om, Nd, Kd, Jd)
# NufftObj.offload(API = 'cuda', platform_number = 0, device_number = 0)
gx = NufftObj.thr.to_device(image.astype(numpy.complex64))
gy = NufftObj.forward(gx)
import time
t0 = time.time()
restore_x2 = GBPDNA_old(NufftObj, gy, maxiter=5)
t1 = time.time()
restore_x = NufftObj.solve(gy, 'cg', maxiter=50)
t2 = time.time()
print("GBPDNA time = ", t1 - t0)
print("CG time = ", t2 - t1)
#restore_image1 = NufftObj.solve(kspace,'L1TVLAD', maxiter=300,rho=0.1)
#
# restore_x2 = NufftObj.solve(gy,'L1TVOLS', maxiter=100,rho=0.2)
# tau_1 = 1
# tau_2 = 0.1
pyplot.subplot(1, 2, 1)
pyplot.imshow(numpy.real(gx.get()[:, :, mid_slice]),
label='original signal',
cmap=gray)
pyplot.title('original')
def test_init():
# cm = matplotlib.cm.gray
# load example image
import pkg_resources
DATA_PATH = pkg_resources.resource_filename('pynufft', 'src/data/')
# PHANTOM_FILE = pkg_resources.resource_filename('pynufft', 'data/phantom_256_256.txt')
import numpy
# import matplotlib.pyplot
import scipy
image = scipy.misc.ascent()[::2,::2]
image=image.astype(numpy.float)/numpy.max(image[...])
Nd = (256, 256) # image space size
Kd = (512, 512) # k-space size
Jd = (6,6) # interpolation size
# load k-space points
om = numpy.load(DATA_PATH+'om2D.npz')['arr_0']
nfft = NUFFT_cpu() # CPU
nfft.plan(om, Nd, Kd, Jd)
try:
NufftObj = NUFFT_hsa('cuda',0,0)
except:
NufftObj = NUFFT_hsa('ocl',0,0)
# NufftObj2 = NUFFT_hsa('cuda',0,0)
NufftObj.debug = 1
NufftObj.plan(om, Nd, Kd, Jd, radix=2)
# NufftObj2.plan(om, Nd, Kd, Jd)
# NufftObj.offload(API = 'cuda', platform_number = 0, device_number = 0)
# NufftObj2.offload(API = 'cuda', platform_number = 0, device_number = 0)
# NufftObj2.offload('cuda')
# NufftObj.offload(API = 'cuda', platform_number = 0, device_number = 0)
# print('api=', NufftObj.thr.api_name())
# NufftObj.offload(API = 'ocl', platform_number = 0, device_number = 0)
y = nfft.k2y(nfft.xx2k(nfft.x2xx(image)))
NufftObj.x_Nd = NufftObj.thr.to_device( image.astype(dtype))
gx = NufftObj.thr.copy_array(NufftObj.x_Nd)
print('x close? = ', numpy.allclose(image, gx.get() , atol=1e-4))
gxx = NufftObj.x2xx(gx)
print('xx close? = ', numpy.allclose(nfft.x2xx(image), gxx.get() , atol=1e-4))
gk = NufftObj.xx2k(gxx)
k = nfft.xx2k(nfft.x2xx(image))
print('k close? = ', numpy.allclose(nfft.xx2k(nfft.x2xx(image)), gk.get(), atol=1e-3*numpy.linalg.norm(k)))
gy = NufftObj.k2y(gk)
k2 = NufftObj.y2k(gy)
print('y close? = ', numpy.allclose(y, gy.get() , atol=1e-3*numpy.linalg.norm(y)), numpy.linalg.norm((y - gy.get())/numpy.linalg.norm(y)))
y2 = y
print('k2 close? = ', numpy.allclose(nfft.y2k(y2), k2.get(), atol=1e-3*numpy.linalg.norm(nfft.y2k(y2)) ), numpy.linalg.norm(( nfft.y2k(y2)- k2.get())/numpy.linalg.norm(nfft.y2k(y2))))
gxx2 = NufftObj.k2xx(k2)
# print('xx close? = ', numpy.allclose(nfft.k2xx(nfft.y2k(y2)), NufftObj.xx_Nd.get(queue=NufftObj.queue, async=False) , atol=0.1))
gx2 = NufftObj.xx2x(gxx2)
print('x close? = ', numpy.allclose(nfft.adjoint(y2), gx2.get() , atol=1e-3*numpy.linalg.norm(nfft.adjoint(y2))))
image3 = gx2.get()
import time
t0 = time.time()
# k = nfft.xx2k(nfft.x2xx(image))
for pp in range(0,50):
# y = nfft.k2y(nfft.xx2k(nfft.x2xx(image)))
y = nfft.forward(image)
# y = nfft.k2y(k)
# k = nfft.y2k(y)
# x = nfft.adjoint(y)
# y = nfft.forward(image)
# y2 = NufftObj.y.get( NufftObj.queue, async=False)
t_cpu = (time.time() - t0)/50.0
print(t_cpu)
# del nfft
gy2=NufftObj.forward(gx)
# gk = NufftObj.xx2k(NufftObj.x2xx(gx))
t0= time.time()
for pp in range(0,20):
# pass
gy2 = NufftObj.forward(gx)
# gy2 = NufftObj.k2y(gk)
# gx2 = NufftObj.adjoint(gy2)
# gk2 = NufftObj.y2k(gy2)
# del gy2
# c = gx2.get()
# gy=NufftObj.forward(gx)
NufftObj.thr.synchronize()
t_cl = (time.time() - t0)/20
print(t_cl)
print('gy close? = ', numpy.allclose(y, gy.get(), atol=numpy.linalg.norm(y)*1e-3))
print("acceleration=", t_cpu/t_cl)
maxiter =100
import time
t0= time.time()
# x2 = nfft.solve(y2, 'cg',maxiter=maxiter)
x2 = nfft.solve(y2, 'L1TVOLS',maxiter=maxiter, rho = 2)
t1 = time.time()-t0
# gy=NufftObj.thr.copy_array(NufftObj.thr.to_device(y2))
t0= time.time()
# x = NufftObj.solve(gy,'cg', maxiter=maxiter)
x = NufftObj.solve(gy,'L1TVOLS', maxiter=maxiter, rho=2)
t2 = time.time() - t0
print(t1, t2)
print('acceleration=', t1/t2 )
# k = x.get()
# x = nfft.k2xx(k)/nfft.st['sn']
# return
try:
import matplotlib.pyplot
matplotlib.pyplot.subplot(1, 2, 1)
matplotlib.pyplot.imshow( x.get().real, cmap= matplotlib.cm.gray, vmin = 0, vmax = 1)
matplotlib.pyplot.title("HSA reconstruction")
matplotlib.pyplot.subplot(1, 2,2)
matplotlib.pyplot.imshow(x2.real, cmap= matplotlib.cm.gray)
matplotlib.pyplot.title("CPU reconstruction")
matplotlib.pyplot.show(block = False)
matplotlib.pyplot.pause(3)
matplotlib.pyplot.close()
# del NufftObj.thr
# del NufftObj
except:
print("no graphics")