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metaBench_rings.py
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metaBench_rings.py
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import numpy as np
import ADEUtils as ADE
import pyfits
import matplotlib.pyplot as plt
def sauron(direct_image, widths_list):
wf = np.loadtxt(widths_list,usecols=(0,2))
rang = wf[:,0] - 1.0247
zidx = np.where(rang >= 0.0)[0][0]
ang = rang[zidx:]
nwid = wf[:,1][:zidx]
pwid = wf[:,1][zidx+1:]
wid = wf[:,1][zidx:]/2
rings = disc2rings(direct_image,ang)
dims = (rings.shape[1]*2,rings.shape[2]*2)
kk = kernel_gen(wid,dims)
smear = ring_smear(rings,kk)
# smear = 0
comb = np.sum(smear,axis=0)
return (rings,kk,smear,comb,wid,ang)
def disc2rings(image,angles):
HDU = pyfits.open(image)[0]
data = np.float32(HDU.data)
FL = HDU.header['FOCALLEN']
print FL
dims = data.shape
cent = ADE.centroid(data)
dist = ADE.dist_gen(data,cent)
ring_stack = np.zeros((1,dims[0],dims[1]),dtype=np.float32)
sangles = np.sort(angles)
sangles *= np.pi/180
for i in range(sangles.size):
r_mid = FL*np.tan(sangles[i])/24e-3
if i == 0: r0_mid = -1*FL*np.tan(sangles[i])/24e-3
else: r0_mid = FL*np.tan(sangles[i-1])/24e-3
try:r2_mid = FL*np.tan(sangles[i+1])/24e-3
except IndexError:r2_mid = r_mid + (r_mid - r0_mid)
r1 = (r_mid + r0_mid)/2
r2 = (r_mid + r2_mid)/2
print r1, r2, r2 - r1
idx = np.where((dist > r1) & (dist <= r2))
temp = np.zeros(dims,dtype=np.float32)
temp[idx] = data[idx]
ring_stack = np.vstack((ring_stack,np.array([temp])))
return ring_stack[1:]
def kernel_gen(widths,dims):
k_stack = np.zeros((1,dims[0],dims[1]),dtype=np.float32)
cent = (dims[0]/2,dims[1]/2)
print cent
for i in range(widths.size):
k = ADE.ADE_gauss2d(dims,cent,0,FWHM=widths[i]/24e-3)
k_stack = np.vstack((k_stack,np.array([k])))
return k_stack[1:]
def ring_smear(rings, kernels):
FFT = np.fft.rfft2
IFFT = np.fft.irfft2
pad = (rings.shape[1]*2, rings.shape[2]*2)
conv =FFT(rings,s=pad) * FFT(kernels,s=pad)
# return np.fft.ifftshift(IFFT(conv).real,axes=(1,2))
return np.roll(np.roll(IFFT(conv).real,-512,axis=1),-512,axis=2)
def plot_smear(rings,title):
FL = 50.0
pangles = np.zeros(300)
powers = np.zeros(300)
for i in range(rings.shape[0]):
print i
r,f = ADE.annulize(rings[i],300)
powers += f
pangles = np.arctan(r*24e-3/FL)*180/np.pi
# for i in range(angles.size):
# r_mid = FL*np.tan(sangles[i])/24e-3
#
# if i == 0: r0_mid = -1*FL*np.tan(sangles[i])/24e-3
# else: r0_mid = FL*np.tan(sangles[i-1])/24e-3
#
# try:r2_mid = FL*np.tan(sangles[i+1])/24e-3
# except IndexError:r2_mid = r_mid + (r_mid - r0_mid)
#
# r1 = (r_mid + r0_mid)/2
# r2 = (r_mid + r2_mid)/2
#
# #for plotting
# a1 = np.arctan(r1*24e-3/FL)*180/np.pi
# a2 = np.arctan(r2*24e-3/FL)*180/np.pi
# pangles = np.append(pangles,np.linspace(a1,a2,num=100,endpoint=False))
# powers = np.append(powers,np.zeros(100)+np.sum(rings[i]))
fig = plt.figure(3)
plt.clf()
ax = fig.add_subplot('111')
ax.plot(pangles,powers)
ax.set_xlabel('Angle [deg]')
ax.set_ylabel('Power')
ax.set_xlim(0,18)
ax.set_title(title)
fig.show()