text stringlengths 1 93.6k |
|---|
Email: chenxuelei@hotmail.com
|
Usage:
|
python evaluate.py RESULT_PATH REFERENCE_PATH
|
'''
|
import numpy as np
|
from skimage.measure import compare_psnr, compare_ssim
|
import math
|
import sys
|
from skimage import io, color, filters
|
import os
|
import math
|
def rmetrics(a,b):
|
#pnsr
|
mse = np.mean((a-b)**2)
|
psnr = 10*math.log10(1/mse)
|
#ssim
|
ssim = compare_ssim(a,b,multichannel=True)
|
return psnr, ssim
|
def nmetrics(a):
|
rgb = a
|
lab = color.rgb2lab(a)
|
gray = color.rgb2gray(a)
|
# UCIQE
|
c1 = 0.4680
|
c2 = 0.2745
|
c3 = 0.2576
|
l = lab[:,:,0]
|
#1st term
|
chroma = (lab[:,:,1]**2 + lab[:,:,2]**2)**0.5
|
uc = np.mean(chroma)
|
sc = (np.mean((chroma - uc)**2))**0.5
|
#2nd term
|
top = np.int(np.round(0.01*l.shape[0]*l.shape[1]))
|
sl = np.sort(l,axis=None)
|
isl = sl[::-1]
|
conl = np.mean(isl[:top])-np.mean(sl[:top])
|
#3rd term
|
satur = []
|
chroma1 = chroma.flatten()
|
l1 = l.flatten()
|
for i in range(len(l1)):
|
if chroma1[i] == 0: satur.append(0)
|
elif l1[i] == 0: satur.append(0)
|
else: satur.append(chroma1[i] / l1[i])
|
us = np.mean(satur)
|
uciqe = c1 * sc + c2 * conl + c3 * us
|
# UIQM
|
p1 = 0.0282
|
p2 = 0.2953
|
p3 = 3.5753
|
#1st term UICM
|
rg = rgb[:,:,0] - rgb[:,:,1]
|
yb = (rgb[:,:,0] + rgb[:,:,1]) / 2 - rgb[:,:,2]
|
rgl = np.sort(rg,axis=None)
|
ybl = np.sort(yb,axis=None)
|
al1 = 0.1
|
al2 = 0.1
|
T1 = np.int(al1 * len(rgl))
|
T2 = np.int(al2 * len(rgl))
|
rgl_tr = rgl[T1:-T2]
|
ybl_tr = ybl[T1:-T2]
|
urg = np.mean(rgl_tr)
|
s2rg = np.mean((rgl_tr - urg) ** 2)
|
uyb = np.mean(ybl_tr)
|
s2yb = np.mean((ybl_tr- uyb) ** 2)
|
uicm =-0.0268 * np.sqrt(urg**2 + uyb**2) + 0.1586 * np.sqrt(s2rg + s2yb)
|
#2nd term UISM (k1k2=8x8)
|
Rsobel = rgb[:,:,0] * filters.sobel(rgb[:,:,0])
|
Gsobel = rgb[:,:,1] * filters.sobel(rgb[:,:,1])
|
Bsobel = rgb[:,:,2] * filters.sobel(rgb[:,:,2])
|
Rsobel=np.round(Rsobel).astype(np.uint8)
|
Gsobel=np.round(Gsobel).astype(np.uint8)
|
Bsobel=np.round(Bsobel).astype(np.uint8)
|
Reme = eme(Rsobel)
|
Geme = eme(Gsobel)
|
Beme = eme(Bsobel)
|
uism = 0.299 * Reme + 0.587 * Geme + 0.114 * Beme
|
#3rd term UIConM
|
uiconm = logamee(gray)
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.