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eval_cls_voc.py
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eval_cls_voc.py
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from __future__ import print_function, division, absolute_import
import csv
import os
import os.path
import tarfile
from six.moves.urllib.parse import urlparse
import numpy as np
import torch
import torch.utils.data as data
from PIL import Image
import random
from tqdm import tqdm
from six.moves.urllib.request import urlretrieve
object_categories = ['aeroplane', 'bicycle', 'bird', 'boat',
'bottle', 'bus', 'car', 'cat', 'chair',
'cow', 'diningtable', 'dog', 'horse',
'motorbike', 'person', 'pottedplant',
'sheep', 'sofa', 'train', 'tvmonitor']
urls = {
'devkit': 'http://host.robots.ox.ac.uk/pascal/VOC/voc2012/VOCdevkit_18-May-2011.tar',
'trainval_2007': 'http://host.robots.ox.ac.uk/pascal/VOC/voc2007/VOCtrainval_06-Nov-2007.tar',
'test_images_2007': 'http://host.robots.ox.ac.uk/pascal/VOC/voc2007/VOCtest_06-Nov-2007.tar',
'test_anno_2007': 'http://host.robots.ox.ac.uk/pascal/VOC/voc2007/VOCtestnoimgs_06-Nov-2007.tar',
}
def read_image_label(file):
print('[dataset] read ' + file)
data = dict()
with open(file, 'r') as f:
for line in f:
tmp = line.split(' ')
name = tmp[0]
label = int(tmp[-1])
data[name] = label
# data.append([name, label])
# print('%s %d' % (name, label))
return data
def read_object_labels(root, dataset, set):
path_labels = os.path.join(root, 'VOCdevkit', dataset, 'ImageSets', 'Main')
labeled_data = dict()
num_classes = len(object_categories)
for i in range(num_classes):
file = os.path.join(path_labels, object_categories[i] + '_' + set + '.txt')
data = read_image_label(file)
if i == 0:
for (name, label) in data.items():
labels = np.zeros(num_classes)
labels[i] = label
labeled_data[name] = labels
else:
for (name, label) in data.items():
labeled_data[name][i] = label
return labeled_data
def write_object_labels_csv(file, labeled_data):
# write a csv file
print('[dataset] write file %s' % file)
with open(file, 'w') as csvfile:
fieldnames = ['name']
fieldnames.extend(object_categories)
writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
writer.writeheader()
for (name, labels) in labeled_data.items():
example = {'name': name}
for i in range(20):
example[fieldnames[i + 1]] = int(labels[i])
writer.writerow(example)
csvfile.close()
def read_object_labels_csv(file, header=True):
images = []
num_categories = 0
print('[dataset] read', file)
with open(file, 'r') as f:
reader = csv.reader(f)
rownum = 0
for row in reader:
if header and rownum == 0:
header = row
else:
if num_categories == 0:
num_categories = len(row) - 1
name = row[0]
labels = (np.asarray(row[1:num_categories + 1])).astype(np.float32)
labels = torch.from_numpy(labels)
item = (name, labels)
images.append(item)
rownum += 1
return images
def find_images_classification(root, dataset, set):
path_labels = os.path.join(root, 'VOCdevkit', dataset, 'ImageSets', 'Main')
images = []
file = os.path.join(path_labels, set + '.txt')
with open(file, 'r') as f:
for line in f:
images.append(line)
return images
def download_voc2007(root):
path_devkit = os.path.join(root, 'VOCdevkit')
path_images = os.path.join(root, 'VOCdevkit', 'VOC2007', 'JPEGImages')
tmpdir = os.path.join(root, 'tmp')
# create directory
if not os.path.exists(root):
os.makedirs(root)
if not os.path.exists(path_devkit):
if not os.path.exists(tmpdir):
os.makedirs(tmpdir)
parts = urlparse(urls['devkit'])
filename = os.path.basename(parts.path)
cached_file = os.path.join(tmpdir, filename)
if not os.path.exists(cached_file):
print('Downloading: "{}" to {}\n'.format(urls['devkit'], cached_file))
download_url(urls['devkit'], cached_file)
# extract file
print('[dataset] Extracting tar file {file} to {path}'.format(file=cached_file, path=root))
cwd = os.getcwd()
tar = tarfile.open(cached_file, "r")
os.chdir(root)
tar.extractall()
tar.close()
os.chdir(cwd)
print('[dataset] Done!')
# train/val images/annotations
if not os.path.exists(path_images):
# download train/val images/annotations
parts = urlparse(urls['trainval_2007'])
filename = os.path.basename(parts.path)
cached_file = os.path.join(tmpdir, filename)
if not os.path.exists(cached_file):
print('Downloading: "{}" to {}\n'.format(urls['trainval_2007'], cached_file))
download_url(urls['trainval_2007'], cached_file)
# extract file
print('[dataset] Extracting tar file {file} to {path}'.format(file=cached_file, path=root))
cwd = os.getcwd()
tar = tarfile.open(cached_file, "r")
os.chdir(root)
tar.extractall()
tar.close()
os.chdir(cwd)
print('[dataset] Done!')
# test annotations
test_anno = os.path.join(path_devkit, 'VOC2007/ImageSets/Main/aeroplane_test.txt')
if not os.path.exists(test_anno):
# download test annotations
parts = urlparse(urls['test_images_2007'])
filename = os.path.basename(parts.path)
cached_file = os.path.join(tmpdir, filename)
if not os.path.exists(cached_file):
print('Downloading: "{}" to {}\n'.format(urls['test_images_2007'], cached_file))
download_url(urls['test_images_2007'], cached_file)
# extract file
print('[dataset] Extracting tar file {file} to {path}'.format(file=cached_file, path=root))
cwd = os.getcwd()
tar = tarfile.open(cached_file, "r")
os.chdir(root)
tar.extractall()
tar.close()
os.chdir(cwd)
print('[dataset] Done!')
# test images
test_image = os.path.join(path_devkit, 'VOC2007/JPEGImages/000001.jpg')
if not os.path.exists(test_image):
# download test images
parts = urlparse(urls['test_anno_2007'])
filename = os.path.basename(parts.path)
cached_file = os.path.join(tmpdir, filename)
if not os.path.exists(cached_file):
print('Downloading: "{}" to {}\n'.format(urls['test_anno_2007'], cached_file))
download_url(urls['test_anno_2007'], cached_file)
# extract file
print('[dataset] Extracting tar file {file} to {path}'.format(file=cached_file, path=root))
cwd = os.getcwd()
tar = tarfile.open(cached_file, "r")
os.chdir(root)
tar.extractall()
tar.close()
os.chdir(cwd)
print('[dataset] Done!')
def download_url(url, destination=None, progress_bar=True):
"""Download a URL to a local file.
Parameters
----------
url : str
The URL to download.
destination : str, None
The destination of the file. If None is given the file is saved to a temporary directory.
progress_bar : bool
Whether to show a command-line progress bar while downloading.
Returns
-------
filename : str
The location of the downloaded file.
Notes
-----
Progress bar use/example adapted from tqdm documentation: https://github.com/tqdm/tqdm
"""
def my_hook(t):
last_b = [0]
def inner(b=1, bsize=1, tsize=None):
if tsize is not None:
t.total = tsize
if b > 0:
t.update((b - last_b[0]) * bsize)
last_b[0] = b
return inner
if progress_bar:
with tqdm(unit='B', unit_scale=True, miniters=1, desc=url.split('/')[-1]) as t:
filename, _ = urlretrieve(url, filename=destination, reporthook=my_hook(t))
else:
filename, _ = urlretrieve(url, filename=destination)
class Voc2007Classification(data.Dataset):
def __init__(self, root, set, transform=None, target_transform=None):
self.root = root
self.path_devkit = os.path.join(root, 'VOCdevkit')
self.path_images = os.path.join(root, 'VOCdevkit', 'VOC2007', 'JPEGImages')
self.set = set
self.transform = transform
self.target_transform = target_transform
self.low_shot = False
# download dataset
download_voc2007(self.root)
# define path of csv file
path_csv = os.path.join(self.root, 'files', 'VOC2007')
# define filename of csv file
file_csv = os.path.join(path_csv, 'classification_' + set + '.csv')
# create the csv file if necessary
if not os.path.exists(file_csv):
if not os.path.exists(path_csv): # create dir if necessary
os.makedirs(path_csv)
# generate csv file
labeled_data = read_object_labels(self.root, 'VOC2007', self.set)
# write csv file
write_object_labels_csv(file_csv, labeled_data)
self.classes = object_categories
self.images = read_object_labels_csv(file_csv)
print('[dataset] VOC 2007 classification set=%s number of classes=%d number of images=%d' % (
set, len(self.classes), len(self.images)))
def __getitem__(self, index):
if self.low_shot:
path, target = self.images_lowshot[index]
else:
path, target = self.images[index]
img = Image.open(os.path.join(self.path_images, path + '.jpg')).convert('RGB')
if self.transform is not None:
img = self.transform(img)
if self.target_transform is not None:
target = self.target_transform(target)
return img, target
def __len__(self):
if self.low_shot:
return len(self.images_lowshot)
else:
return len(self.images)
def get_number_classes(self):
return len(self.classes)
def convert_low_shot(self, k): #sample k images per class
label2img = {c:[] for c in range(len(self.classes))}
for img in self.images:
label = img[1]
label_classes = torch.where(label>0)[0]
for c in label_classes:
label2img[c.item()].append(img)
self.images_lowshot = []
for c,imlist in label2img.items():
random.shuffle(imlist)
self.images_lowshot += imlist[:k]
self.low_shot = True