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evaluate_rerank.py
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evaluate_rerank.py
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import scipy.io
import torch
import numpy as np
import time
from re_ranking import re_ranking
#######################################################################
# Evaluate
def evaluate(score,ql,qc,gl,gc):
index = np.argsort(score) #from small to large
#index = index[::-1]
# good index
query_index = np.argwhere(gl==ql)
camera_index = np.argwhere(gc==qc)
good_index = np.setdiff1d(query_index, camera_index, assume_unique=True)
junk_index1 = np.argwhere(gl==-1)
junk_index2 = np.intersect1d(query_index, camera_index)
junk_index = np.append(junk_index2, junk_index1) #.flatten())
CMC_tmp = compute_mAP(index, good_index, junk_index)
return CMC_tmp
def compute_mAP(index, good_index, junk_index):
ap = 0
cmc = torch.IntTensor(len(index)).zero_()
if good_index.size==0: # if empty
cmc[0] = -1
return ap,cmc
# remove junk_index
mask = np.in1d(index, junk_index, invert=True)
index = index[mask]
# find good_index index
ngood = len(good_index)
mask = np.in1d(index, good_index)
rows_good = np.argwhere(mask==True)
rows_good = rows_good.flatten()
cmc[rows_good[0]:] = 1
for i in range(ngood):
d_recall = 1.0/ngood
precision = (i+1)*1.0/(rows_good[i]+1)
if rows_good[i]!=0:
old_precision = i*1.0/rows_good[i]
else:
old_precision=1.0
ap = ap + d_recall*(old_precision + precision)/2
return ap, cmc
######################################################################
result = scipy.io.loadmat('pytorch_result.mat')
query_feature = result['query_f']
query_cam = result['query_cam'][0]
query_label = result['query_label'][0]
gallery_feature = result['gallery_f']
gallery_cam = result['gallery_cam'][0]
gallery_label = result['gallery_label'][0]
CMC = torch.IntTensor(len(gallery_label)).zero_()
ap = 0.0
#re-ranking
print('calculate initial distance')
q_g_dist = np.dot(query_feature, np.transpose(gallery_feature))
q_q_dist = np.dot(query_feature, np.transpose(query_feature))
g_g_dist = np.dot(gallery_feature, np.transpose(gallery_feature))
since = time.time()
re_rank = re_ranking(q_g_dist, q_q_dist, g_g_dist)
time_elapsed = time.time() - since
print('Reranking complete in {:.0f}m {:.0f}s'.format(
time_elapsed // 60, time_elapsed % 60))
for i in range(len(query_label)):
ap_tmp, CMC_tmp = evaluate(re_rank[i,:],query_label[i],query_cam[i],gallery_label,gallery_cam)
if CMC_tmp[0]==-1:
continue
CMC = CMC + CMC_tmp
ap += ap_tmp
#print(i, CMC_tmp[0])
CMC = CMC.float()
CMC = CMC/len(query_label) #average CMC
print('top1:%f top5:%f top10:%f mAP:%f'%(CMC[0],CMC[4],CMC[9],ap/len(query_label)))