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peri.py
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peri.py
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# Calculates singularity for each chroma (n) (--chroma n) and gives grid for when a chroma is fixed (--grid)
import numpy as np
import scipy as sp
import math
import csv
import matplotlib.pyplot as plt
from numpy import *
import sys
import argparse
from munsell_wcs import build_wcs_map, build_chiplist, lookup_chip, create_chroma_grid
daylight_data = np.genfromtxt('/home/aurimas/Amgen/amgen_2013/data/lut.fi/daylight/baso4.asc', delimiter = '')
daylight_data_1 = np.genfromtxt('/home/aurimas/Amgen/amgen_2013/data/lut.fi/daylight/tree.asc', delimiter = '')
daylight_data_2 = np.genfromtxt('/home/aurimas/Amgen/amgen_2013/data/lut.fi/daylight/sky.asc', delimiter = '')
reflectance_data = np.genfromtxt('/home/aurimas/Amgen/amgen_2013/data/lut.fi/mglossy_all/munsell380_780_1_glossy.asc', delimiter = '')
sensitivity_data = np.genfromtxt('/home/aurimas/Amgen/perception/linss2_10e_1.csv', delimiter = ',')
baso4 = daylight_data.T;
tree = daylight_data_1.T;
sky = daylight_data_2.T;
print '-' * 10
A = zeros((3,3,1600,))
B1 = zeros(1600)
B2 = zeros(1600)
c = csv.writer(open("eigenvalues.csv", "w"))
for x in range(1600):
U0 = zeros((3,15))
U1 = zeros((3,15))
V0 = zeros((3,15))
V1 = zeros((3,15))
for k in range(15):
for i in range(3):
U0[i,k] = np.sum(np.multiply(sensitivity_data[0:388:4,i+1],tree[0:97,k]))
U1[i,k] = np.sum(np.multiply(sensitivity_data[0:388:4,i+1],baso4[0:97,k]))
V0[i,k] = np.sum(np.multiply(np.multiply(sensitivity_data[0:388:4,i+1],reflectance_data[10:398:4,x]),tree[0:97,k]))
V1[i,k] = np.sum(np.multiply(np.multiply(sensitivity_data[0:388:4,i+1],reflectance_data[10:398:4,x]),baso4[0:97,k]))
U2 = zeros((3,22))
V2 = zeros((3,22))
for l in range(22):
for j in range(3):
U2[j, l] = np.sum(np.multiply(sensitivity_data[0:388:4,j+1],sky[0:97,l]))
V2[j, l] = np.sum(np.multiply(np.multiply(sensitivity_data[0:388:4,j+1],reflectance_data[10:398:4,x]),sky[0:97,l]))
U = np.concatenate((U0,U1,U2),axis=1)
V = np.concatenate((V0,V1,V2),axis=1)
U_pinv = np.linalg.pinv(U)
A[:,:,x] = np.dot(V,U_pinv)
D,E = linalg.eig(A[:,:,x]);
if D.dtype == np.complex128:
D=D.real
B1[x] = abs (D[0]) / abs(D[1]) # special case 1: first type of singularity - variation in incoming light produces strong variation in the reflected light along one direction
#print B1[x]
B2[x] = abs(D[1]) / abs(D[2]) # special case 2: second type of singularity - variation in incoming light only produces strong variations in the reflected light along two directions
b1 = B1.max()
b1_1 = B1.min()
b2 = B2.max()
B = zeros(1600)
for x in range (1600):
B[x] = max(B1[x]/b1,B2[x]/b2)
wcs_map = build_wcs_map()
chips = build_chiplist()
wcs_chip = wcs_map['C2']
parser = argparse.ArgumentParser(description='Calculate Singularity')
parser.add_argument('--chroma', type=int, default=-1)
parser.add_argument('--grid', action='store_true', default=False)
args = parser.parse_args()
hue_x = np.empty((8, 40))
for row in xrange(1, 9):
R = chr(ord('A') + row)
for col in xrange(1, 41):
idx = '%s%d' % (R, col)
wcs_chip = wcs_map[idx]
if args.chroma > 0:
chroma = args.chroma
do_fallback = True
do_fallthrough = True
else:
chroma = wcs_chip['chroma']
do_fallback = True
do_fallthrough = False
chip = lookup_chip(wcs_chip['hue'], wcs_chip['value'], chroma, chips, fallback=do_fallback, fallthrough=do_fallthrough)
# print idx, chip['index'], B[chip['index']]
hue_x[row-1, col-1] = B[chip['index']]
fig = plt.figure()
ax = fig.add_subplot([1,2][args.grid],1,1)
plt.imshow(np.flipud(hue_x), interpolation='nearest')
chroma_str = ('WCS', '%d' % args.chroma)
ax.set_title('Singularities for chroma %s' % chroma_str[args.chroma > 0])
plt.yticks([0, 1, 2, 3, 4, 5, 6, 7], ['B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'])
cbar = plt.colorbar(shrink=[0.27, 0.5][args.grid])
#cbar.set_ticks(xrange(np.min(B[:]), np.max(B[:]), ))
if args.grid:
ax = fig.add_subplot(2,1,2)
ax.set_title('Chroma of 6')
grid = create_chroma_grid(wcs_map, chips, args.chroma) #np.empty((8, 40))
pic = plt.imshow(grid, interpolation='nearest')
plt.gca().invert_yaxis()
plt.yticks([0, 1, 2, 3, 4, 5, 6, 7], ['B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'])
cbar = plt.colorbar(pic, shrink=0.6)
cbar.set_ticks(xrange(2, 18, 2))
plt.savefig('Chroma 6 chroma values1.eps',dpi=300)
plt.show()