/
data_loader.py
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/
data_loader.py
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import os
import tarfile
import zipfile
import anndata
import cv2
import keras
import numpy as np
import pandas as pd
import scanpy as sc
from PIL import Image
def prepare_and_load_celeba(file_path, attr_path, landmark_path,
gender='Male', attribute='Smiling',
max_n_images=None,
restore=True,
save=True,
img_width=64, img_height=78,
verbose=True):
data_path = os.path.dirname(file_path)
zip_filename = os.path.basename(file_path).split(".")[0]
if restore and os.path.exists(
os.path.join(data_path, f"celeba_{attribute}_{img_width}x{img_height}_{max_n_images}.h5ad")):
return sc.read(os.path.join(data_path, f"celeba_{attribute}_{img_width}x{img_height}_{max_n_images}.h5ad"))
def load_attr_list(file_path):
indices = []
attributes = []
with open(file_path) as f:
lines = f.read().splitlines()
columns = lines[1].split(" ")
columns.remove('')
for i in range(2, len(lines)):
elements = lines[i].split()
indices.append(elements[0])
attributes.append(list(map(int, elements[1:])))
attr_df = pd.DataFrame(attributes)
attr_df.index = indices
attr_df.columns = columns
if verbose:
print(attr_df.shape[0])
return attr_df
def load_landmark_list(file_path):
indices = []
landmarks = []
with open(file_path) as f:
lines = f.read().splitlines()
columns = lines[1].split(" ")
for i in range(2, len(lines)):
elements = lines[i].split()
indices.append(elements[0])
landmarks.append(list(map(int, elements[1:])))
landmarks_df = pd.DataFrame(landmarks)
landmarks_df.index = indices
landmarks_df.columns = columns
print(landmarks_df.shape[0])
return landmarks_df
images = []
zfile = zipfile.ZipFile(file_path)
counter = 0
attr_df = load_attr_list(attr_path)
landmarks = load_landmark_list(landmark_path)
landmarks = landmarks[abs(landmarks['lefteye_x'] - landmarks['righteye_x']) > 30]
landmarks = landmarks[abs(landmarks['lefteye_x'] - landmarks['nose_x']) > 15]
landmarks = landmarks[abs(landmarks['righteye_x'] - landmarks['nose_x']) > 15]
landmarks.head()
attr_df = attr_df.loc[landmarks.index]
print("# of images after preprocessing: ", attr_df.shape[0])
indices = []
for filename in attr_df.index.tolist():
ifile = zfile.open(os.path.join(f"{zip_filename}/", filename))
image = Image.open(ifile)
image_landmarks = landmarks.loc[filename]
most_left_x = max(0, min(image_landmarks['lefteye_x'], image_landmarks['leftmouth_x']) - 15)
most_right_x = min(178, min(image_landmarks['righteye_x'], image_landmarks['rightmouth_x']) + 15)
most_up_y = max(0, image_landmarks['lefteye_y'] - 35)
most_down_y = min(218, image_landmarks['rightmouth_y'] + 25)
image_cropped = image.crop((most_left_x, most_up_y, most_right_x, most_down_y))
image_cropped = image_cropped.resize((img_width, img_height), Image.NEAREST)
image = image_cropped
image = np.reshape(image, (img_width, img_height, 3))
if max_n_images is None:
images.append(image)
indices.append(filename)
counter += 1
if verbose and counter % 1000 == 0:
print(counter)
else:
if counter < max_n_images:
images.append(image)
indices.append(filename)
counter += 1
if verbose and counter % 1000 == 0:
print(counter)
else:
break
images = np.array(images)
if verbose:
print(images.shape)
images_df = pd.DataFrame(images.reshape(-1, np.prod(images.shape[1:])))
images_df.index = indices
if save:
data = anndata.AnnData(X=images_df.values)
attr_df = attr_df.loc[images_df.index]
print(data.shape, attr_df.shape)
data.obs['labels'] = attr_df[gender].values
data.obs['condition'] = attr_df[attribute].values
sc.write(filename=os.path.join(data_path, f"celeba_{attribute}_{img_width}x{img_height}_{max_n_images}.h5ad"),
adata=data)
return data
def prepare_and_load_edge2shoe(file_path,
restore=True, save=True,
img_width=64, img_height=64,
verbose=True):
data_path = os.path.dirname(file_path)
if restore and os.path.exists(os.path.join(data_path, f"edges2shoes_{img_width}x{img_height}.h5ad")):
return sc.read(os.path.join(data_path, f"edges2shoes_{img_width}x{img_height}.h5ad"))
tar = tarfile.open(file_path)
images, edges = [], []
counter = 0
for member in tar.getmembers():
if member.name.endswith(".jpg"):
f = tar.extractfile(member)
image = Image.open(f)
edge, image = image.crop((0, 0, 256, 256)), image.crop((256, 0, 512, 256))
edge = edge.resize((64, 64), Image.BICUBIC)
image = image.resize((64, 64), Image.NEAREST)
edge = np.array(edge)
image = np.array(image)
images.append(image)
edges.append(edge)
counter += 1
if verbose and counter % 1000 == 0:
print(counter)
images = np.array(images)
edges = np.array(edges)
images = images.reshape(-1, np.prod(images.shape[1:]))
edges = edges.reshape(-1, np.prod(edges.shape[1:]))
data = np.concatenate([images, edges], axis=0)
if save:
data = anndata.AnnData(X=data)
data.obs['id'] = np.concatenate([np.arange(images.shape[0]), np.arange(images.shape[0])])
data.obs['condition'] = ['shoe'] * images.shape[0] + ['edge'] * images.shape[0]
sc.write(filename=os.path.join(data_path, f"edges2shoes_{img_width}x{img_height}.h5ad"), adata=data)
return data
def resize_image(images, img_width, img_height):
images_list = []
for i in range(images.shape[0]):
image = cv2.resize(images[i], (img_width, img_height), cv2.INTER_NEAREST)
images_list.append(image)
return np.array(images_list)
class PairedDataSequence(keras.utils.Sequence):
def __init__(self, image_paths, batch_size):
self.image_paths = image_paths
self.batch_size = batch_size
def __len__(self):
return len(self.image_paths)
def __getitem__(self, idx):
edges, images = [], []
batch_image_paths = self.image_paths[idx:idx + self.batch_size]
for image_path in batch_image_paths:
with Image.open(image_path) as image:
edge = np.array(image.crop((0, 0, 256, 256)).resize((64, 64), Image.BICUBIC))
image = np.array(image.crop((256, 0, 512, 256)).resize((64, 64), Image.NEAREST))
edges.append(edge)
images.append(image)
edges = np.array(edges)
images = np.array(images)
edges = edges.astype(np.float32)
images = images.astype(np.float32)
# Pre-processing
edges /= 255.0
images /= 255.0
x = np.concatenate([edges, edges, images, images], axis=0)
y = np.concatenate([edges, images, images, edges], axis=0)
encoder_labels_feed = np.concatenate([np.zeros(edges.shape[0]), np.zeros(edges.shape[0]),
np.ones(images.shape[0]), np.ones(images.shape[0])])
decoder_labels_feed = np.concatenate([np.zeros(edges.shape[0]), np.ones(edges.shape[0]),
np.ones(images.shape[0]), np.zeros(images.shape[0])])
x_feed = [x, encoder_labels_feed, decoder_labels_feed]
y_feed = [y, encoder_labels_feed]
return x_feed, y_feed