# Make fake images
course: Academy — 54-Next-Gen-AI-GenAI-Agents-Future-Trends
module: Academy/54-Next-Gen-AI-GenAI-Agents-Future-Trends
type: notebook
source_url: https://personal-learn.armco.dev/files/Academy/54-Next-Gen-AI-GenAI-Agents-Future-Trends/folders/Session_5_-_GANs_Folder/Make_fake_images.ipynb
---
[cell 1 code]
#@title Face Detector & FFHQ-style Alignment
# https://github.com/woctezuma/stylegan2-projecting-images
import os
import dlib
import collections
from typing import Union, List
import numpy as np
from PIL import Image
import matplotlib.pyplot as plt
def get_dlib_face_detector(predictor_path: str = "shape_predictor_68_face_landmarks.dat"):
if not os.path.isfile(predictor_path):
model_file = "shape_predictor_68_face_landmarks.dat.bz2"
os.system(f"wget http://dlib.net/files/{model_file}")
os.system(f"bzip2 -dk {model_file}")
detector = dlib.get_frontal_face_detector()
shape_predictor = dlib.shape_predictor(predictor_path)
def detect_face_landmarks(img: Union[Image.Image, np.ndarray]):
if isinstance(img, Image.Image):
img = np.array(img)
faces = []
dets = detector(img)
for d in dets:
shape = shape_predictor(img, d)
faces.append(np.array([[v.x, v.y] for v in shape.parts()]))
return faces
return detect_face_landmarks
def display_facial_landmarks(
img: Image,
landmarks: List[np.ndarray],
fig_size=[15, 15]
):
plot_style = dict(
marker='o',
markersize=4,
linestyle='-',
lw=2
)
pred_type = collections.namedtuple('prediction_type', ['slice', 'color'])
pred_types = {
'face': pred_type(slice(0, 17), (0.682, 0.780, 0.909, 0.5)),
'eyebrow1': pred_type(slice(17, 22), (1.0, 0.498, 0.055, 0.4)),
'eyebrow2': pred_type(slice(22, 27), (1.0, 0.498, 0.055, 0.4)),
'nose': pred_type(slice(27, 31), (0.345, 0.239, 0.443, 0.4)),
'nostril': pred_type(slice(31, 36), (0.345, 0.239, 0.443, 0.4)),
'eye1': pred_type(slice(36, 42), (0.596, 0.875, 0.541, 0.3)),
'eye2': pred_type(slice(42, 48), (0.596, 0.875, 0.541, 0.3)),
'lips': pred_type(slice(48, 60), (0.596, 0.875, 0.541, 0.3)),
'teeth': pred_type(slice(60, 68), (0.596, 0.875, 0.541, 0.4))
}
fig = plt.figure(figsize=fig_size)
ax = fig.add_subplot(1, 1, 1)
ax.imshow(img)
ax.axis('off')
for face in landmarks:
for pred_type in pred_types.values():
ax.plot(
face[pred_type.slice, 0],
face[pred_type.slice, 1],
color=pred_type.color, **plot_style
)
plt.show()
# https://github.com/NVlabs/ffhq-dataset/blob/master/download_ffhq.py
import PIL.Image
import PIL.ImageFile
import numpy as np
import scipy.ndimage
def align_and_crop_face(
img: Image.Image,
landmarks: np.ndarray,
expand: float = 1.0,
output_size: int = 1024,
transform_size: int = 4096,
enable_padding: bool = True,
):
# Parse landmarks.
# pylint: disable=unused-variable
lm = landmarks
lm_chin = lm[0 : 17] # left-right
lm_eyebrow_left = lm[17 : 22] # left-right
lm_eyebrow_right = lm[22 : 27] # left-right
lm_nose = lm[27 : 31] # top-down
lm_nostrils = lm[31 : 36] # top-down
lm_eye_left = lm[36 : 42] # left-clockwise
lm_eye_right = lm[42 : 48] # left-clockwise
lm_mouth_outer = lm[48 : 60] # left-clockwise
lm_mouth_inner = lm[60 : 68] # left-clockwise
# Calculate auxiliary vectors.
eye_left = np.mean(lm_eye_left, axis=0)
eye_right = np.mean(lm_eye_right, axis=0)
eye_avg = (eye_left + eye_right) * 0.5
eye_to_eye = eye_right - eye_left
mouth_left = lm_mouth_outer[0]
mouth_right = lm_mouth_outer[6]
mouth_avg = (mouth_left + mouth_right) * 0.5
eye_to_mouth = mouth_avg - eye_avg
# Choose oriented crop rectangle.
x = eye_to_eye - np.flipud(eye_to_mouth) * [-1, 1]
x /= np.hypot(*x)
x *= max(np.hypot(*eye_to_eye) * 2.0, np.hypot(*eye_to_mouth) * 1.8)
x *= expand
y = np.flipud(x) * [-1, 1]
c = eye_avg + eye_to_mouth * 0.1
quad = np.stack([c - x - y, c - x + y, c + x + y, c + x - y])
qsize = np.hypot(*x) * 2
# Shrink.
shrink = int(np.floor(qsize / output_size * 0.5))
if shrink > 1:
rsize = (int(np.rint(float(img.size[0]) / shrink)), int(np.rint(float(img.size[1]) / shrink)))
img = img.resize(rsize, PIL.Image.ANTIALIAS)
quad /= shrink
qsize /= shrink
# Crop.
border = max(int(np.rint(qsize * 0.1)), 3)
crop = (int(np.floor(min(quad[:,0]))), int(np.floor(min(quad[:,1]))), int(np.ceil(max(quad[:,0]))), int(np.ceil(max(quad[:,1]))))
crop = (max(crop[0] - border, 0), max(crop[1] - border, 0), min(crop[2] + border, img.size[0]), min(crop[3] + border, img.size[1]))
if crop[2] - crop[0] < img.size[0] or crop[3] - crop[1] < img.size[1]:
img = img.crop(crop)
quad -= crop[0:2]
# Pad.
pad = (int(np.floor(min(quad[:,0]))), int(np.floor(min(quad[:,1]))), int(np.ceil(max(quad[:,0]))), int(np.ceil(max(quad[:,1]))))
pad = (max(-pad[0] + border, 0), max(-pad[1] + border, 0), max(pad[2] - img.size[0] + border, 0), max(pad[3] - img.size[1] + border, 0))
if enable_padding and max(pad) > border - 4:
pad = np.maximum(pad, int(np.rint(qsize * 0.3)))
img = np.pad(np.float32(img), ((pad[1], pad[3]), (pad[0], pad[2]), (0, 0)), 'reflect')
h, w, _ = img.shape
y, x, _ = np.ogrid[:h, :w, :1]
mask = np.maximum(1.0 - np.minimum(np.float32(x) / pad[0], np.float32(w-1-x) / pad[2]), 1.0 - np.minimum(np.float32(y) / pad[1], np.float32(h-1-y) / pad[3]))
blur = qsize * 0.02
img += (scipy.ndimage.gaussian_filter(img, [blur, blur, 0]) - img) * np.clip(mask * 3.0 + 1.0, 0.0, 1.0)
img += (np.median(img, axis=(0,1)) - img) * np.clip(mask, 0.0, 1.0)
img = PIL.Image.fromarray(np.uint8(np.clip(np.rint(img), 0, 255)), 'RGB')
quad += pad[:2]
# Transform.
img = img.transform((transform_size, transform_size), PIL.Image.QUAD, (quad + 0.5).flatten(), PIL.Image.BILINEAR)
if output_size < transform_size:
img = img.resize((output_size, output_size), PIL.Image.ANTIALIAS)
return img
[cell 2 code]
import requests
from io import BytesIO
from PIL import Image
from PIL import Image, ImageFile
ImageFile.LOAD_TRUNCATED_IMAGES = True
#img = Image.open(requests.get("https://upload.wikimedia.org/wikipedia/commons/8/85/Elon_Musk_Royal_Society_%28crop1%29.jpg", stream=True).raw).convert("RGB")
# img = Image.open("/content/sample.jpg").convert("RGB")
yesanimage = "https://i.insider.com/5df18925fd9db27e786eac82?width=700"
img = requests.get(yesanimage)
img = Image.open(BytesIO(img.content))
face_detector = get_dlib_face_detector()
landmarks = face_detector(img)
display_facial_landmarks(img, landmarks, fig_size=[5, 5])
for landmark in landmarks:
face = align_and_crop_face(img, landmark, expand=1.3)
display(face2paint(model=model, img=face, size=512))