# angles number
angles = np.linspace(0.0, 179.9, angles_num, dtype='float32') # in degrees
angles_rad = angles * (np.pi / 180.0)
#%%
# initialise TomoRec DIRECT reconstruction class ONCE
from tomorec.methodsDIR import RecToolsDIR
RectoolsDIR = RecToolsDIR(
DetectorsDimH=Horiz_det, # DetectorsDimH # detector dimension (horizontal)
DetectorsDimV=
Vert_det, # DetectorsDimV # detector dimension (vertical) for 3D case only
AnglesVec=angles_rad, # array of angles in radians
ObjSize=N_size, # a scalar to define reconstructed object dimensions
device='gpu')
#%%
print("Building 3D analytical projection data with TomoPhantom")
projData3D_analyt = TomoP3D.ModelSino(model, N_size, Horiz_det, Vert_det,
angles, path_library3D)
intens_max = 70
sliceSel = 150
plt.figure()
plt.subplot(131)
plt.imshow(projData3D_analyt[:, sliceSel, :], vmin=0, vmax=intens_max)
plt.title('2D Projection (analytical)')
plt.subplot(132)
plt.imshow(projData3D_analyt[sliceSel, :, :], vmin=0, vmax=intens_max)
plt.title('Sinogram view')
plt.subplot(133)
plt.imshow(projData3D_analyt[:, :, sliceSel], vmin=0, vmax=intens_max)
plt.title('Tangentogram view')
plt.show()
#%%
plt.show()
# ## Analytical Projection Data at different angles
# In[4]:
angles = np.arange(0, 2 * np.pi, np.pi / 6, dtype="float32") # in radian
angles_deg = np.arange(0, 360, 30, dtype="float32") # in degree
#--------------------------------------
det_row = 400 ## horizontal detector size
det_col = 400 ## vertical detector size
#--------------------------------------
projData = TomoP3D.ModelSino(model, N_size, det_col, det_row, angles_deg,
path_library3D)
#--------------------------------------
intens_max = 100
plt.figure(figsize=[10, 20])
plt.subplot(131)
plt.imshow(projData[:, 0, :], vmin=10, vmax=intens_max)
plt.title('2D Projection (analytical)')
plt.subplot(132)
plt.imshow(projData[slice_, :, :], vmin=10, vmax=intens_max, aspect="auto")
plt.title('Sinogram view')
plt.subplot(133)
plt.imshow(projData[:, :, slice_], vmin=10, vmax=intens_max, aspect="auto")
plt.title('Tangentogram view')
plt.show()