想知道你未來寶寶長什么樣嗎？

摘要：本案例可根據一張父親和母親的正臉照片，生成孩子的照片，並且可以調節參數，看看不同性別和年齡孩子的長相。

本文分享自華為雲社區《BabyGAN：根據父母照片生成孩子照片》，作者： 山海之光。

本案例可根據一張父親和母親的正臉照片，生成孩子的照片，並且可以調節參數，看看不同性別和年齡孩子的長相。

為保證照片的生成效果，上傳父母的照片時盡量上傳能露出五官且淺色底的照片。

本案例僅用於學習交流，請勿用於其他用途。

另外，由於技術不完善的原因，生成的孩子照片可能會有扭曲或失真，你可以更換不同的父母照片，重新生成孩子照片，直到達到滿意的生成效果為止。

下面開始按步驟運行本案例。

1. 安裝所需的模塊

本步驟耗時約4分鍾

!pip install imutils moviepy dlib

2. 下載代碼和模型文件

import os
import moxing as mox

root_dir = '/home/ma-user/work/ma_share/'
code_dir = os.path.join(root_dir, 'BabyGAN')
if not os.path.exists(os.path.join(root_dir, 'BabyGAN.zip')):
    mox.file.copy('obs://arthur-1/BabyGAN/BabyGAN.zip', os.path.join(root_dir, 'BabyGAN.zip'))
    os.system('cd %s; unzip BabyGAN.zip' % root_dir)

os.chdir(code_dir)

3. 加載相關模塊及模型

import cv2
import math
import pickle
import imageio
import warnings
import PIL.Image
import numpy as np
from glob import glob
from PIL import Image
import tensorflow as tf
from random import randrange
import moviepy.editor as mpy
import matplotlib.pyplot as plt
from IPython.display import clear_output
from moviepy.video.io.ffmpeg_writer import FFMPEG_VideoWriter

import config
import dnnlib
import dnnlib.tflib as tflib
from encoder.generator_model import Generator

%matplotlib inline
warnings.filterwarnings("ignore")

加載模型文件，本代碼塊只可執行一次，如果發生報錯，請restart kernel，重新運行所有代碼

tflib.init_tf()
URL_FFHQ = "./karras2019stylegan-ffhq-1024x1024.pkl"
with dnnlib.util.open_url(URL_FFHQ, cache_dir=config.cache_dir) as f:
    generator_network, discriminator_network, Gs_network = pickle.load(f)
generator = Generator(Gs_network, batch_size=1, randomize_noise=False)
model_scale = int(2 * (math.log(1024, 2) - 1))
age_direction = np.load('./ffhq_dataset/latent_directions/age.npy')
horizontal_direction = np.load('./ffhq_dataset/latent_directions/angle_horizontal.npy')
vertical_direction = np.load('./ffhq_dataset/latent_directions/angle_vertical.npy')
eyes_open_direction = np.load('./ffhq_dataset/latent_directions/eyes_open.npy')
gender_direction = np.load('./ffhq_dataset/latent_directions/gender.npy')
smile_direction = np.load('./ffhq_dataset/latent_directions/smile.npy')
def get_watermarked(pil_image: Image) -> Image:
    try:
        image = cv2.cvtColor(np.array(pil_image), cv2.COLOR_RGB2BGR)
        (h, w) = image.shape[:2]
        image = np.dstack([image, np.ones((h, w), dtype="uint8") * 255])
        pct = 0.08
        full_watermark = cv2.imread('./media/logo.png', cv2.IMREAD_UNCHANGED)
        (fwH, fwW) = full_watermark.shape[:2]
        wH = int(pct * h * 2)
        wW = int((wH * fwW) / fwH * 0.1)
        watermark = cv2.resize(full_watermark, (wH, wW), interpolation=cv2.INTER_AREA)
        overlay = np.zeros((h, w, 4), dtype="uint8")
        (wH, wW) = watermark.shape[:2]
        overlay[h - wH - 10: h - 10, 10: 10 + wW] = watermark
        output = image.copy()
        cv2.addWeighted(overlay, 0.5, output, 1.0, 0, output)
        rgb_image = cv2.cvtColor(output, cv2.COLOR_BGR2RGB)
        return Image.fromarray(rgb_image)
    except:
        return pil_image
def generate_final_images(latent_vector, direction, coeffs, i):
    new_latent_vector = latent_vector.copy()
    new_latent_vector[:8] = (latent_vector + coeffs * direction)[:8]
    new_latent_vector = new_latent_vector.reshape((1, 18, 512))
    generator.set_dlatents(new_latent_vector)
    img_array = generator.generate_images()[0]
    img = PIL.Image.fromarray(img_array, 'RGB')
    if size[0] >= 512: img = get_watermarked(img)
    img_path = "./for_animation/" + str(i) + ".png"
    img.thumbnail(animation_size, PIL.Image.ANTIALIAS)
    img.save(img_path)
    face_img.append(imageio.imread(img_path))
    clear_output()
    return img
def generate_final_image(latent_vector, direction, coeffs):
    new_latent_vector = latent_vector.copy()
    new_latent_vector[:8] = (latent_vector + coeffs * direction)[:8]
    new_latent_vector = new_latent_vector.reshape((1, 18, 512))
    generator.set_dlatents(new_latent_vector)
    img_array = generator.generate_images()[0]
    img = PIL.Image.fromarray(img_array, 'RGB')
    if size[0] >= 512: img = get_watermarked(img)
    img.thumbnail(size, PIL.Image.ANTIALIAS)
    img.save("face.png")
    if download_image == True: files.download("face.png")
    return img
def plot_three_images(imgB, fs=10):
    f, axarr = plt.subplots(1, 3, figsize=(fs, fs))
    axarr[0].imshow(Image.open('./aligned_images/father_01.png'))
    axarr[0].title.set_text("Father's photo")
    axarr[1].imshow(imgB)
    axarr[1].title.set_text("Child's photo")
    axarr[2].imshow(Image.open('./aligned_images/mother_01.png'))
    axarr[2].title.set_text("Mother's photo")
    plt.setp(plt.gcf().get_axes(), xticks=[], yticks=[])
    plt.show()

4. 准備好父親和母親的照片

本案例已各准備好一張默認的父母親照片，可在左側邊欄的文件資源管理窗口中，進入到 ma_share/BabyGAN 目錄，再進入到 father_image 或 mother_image 目錄即可看到已提供的父母親照片，如下圖所示：

如果你需更換父母親的照片，請查看本文第11節“更換父親和母親的照片”

if len(glob(os.path.join('./father_image', '*.jpg'))) != 1 or (not os.path.exists('./father_image/father.jpg')):
    raise Exception('請在 ma_share/BabyGAN/father_image 目錄下准備一張父親的照片，且命名為father.jpg')

if len(glob(os.path.join('./mother_image', '*.jpg'))) != 1 or (not os.path.exists('./mother_image/mother.jpg')):
    raise Exception('請在 ma_share/BabyGAN/father_image 目錄下准備一張母親的照片，且命名為mother.jpg')

5. 獲取父親的臉部區域，並進行人臉對齊

!python align_images.py ./father_image ./aligned_images

查看父親的人臉

if os.path.isfile('./aligned_images/father_01.png'):
    pil_father = Image.open('./aligned_images/father_01.png')
    (fat_width, fat_height) = pil_father.size
    resize_fat = max(fat_width, fat_height) / 256
    display(pil_father.resize((int(fat_width / resize_fat), int(fat_height / resize_fat))))
else:
    raise ValueError('No face was found or there is more than one in the photo.')

6. 獲取母親的臉部區域，並進行人臉對齊

!python align_images.py ./mother_image ./aligned_images

查看母親的人臉

if os.path.isfile('./aligned_images/mother_01.png'):
    pil_mother = Image.open('./aligned_images/mother_01.png')
    (mot_width, mot_height) = pil_mother.size
    resize_mot = max(mot_width, mot_height) / 256
    display(pil_mother.resize((int(mot_width / resize_mot), int(mot_height / resize_mot))))
else:
    raise ValueError('No face was found or there is more than one in the photo.')

7. 提取人臉特征

本步驟耗時約3分鍾

!python encode_images.py \
    --early_stopping False \
    --lr=0.25 \
    --batch_size=2 \
    --iterations=100 \
    --output_video=False \
    ./aligned_images \
    ./generated_images \
    ./latent_representations

if len(glob(os.path.join('./generated_images', '*.png'))) == 2:
    first_face = np.load('./latent_representations/father_01.npy')
    second_face = np.load('./latent_representations/mother_01.npy')
    print("Generation of latent representation is complete! Now comes the fun part.")
else:
    raise ValueError('Something wrong. It may be impossible to read the face in the photos. Upload other photos and try again.')

8. 生成一家三口照片

請修改下面代碼中的 gender_influence 和 person_age參數，

gender_influence：性別影響因子，取值范圍[0.01, 0.99]，取值越接近0，父親的容貌影響越大，反之母親影響越大；

person_age：年齡影響因子，取值范圍[10, 50]，設置該值后，將生成對應年齡的小孩的容貌。

每次修改該參數值后，重新運行下面的代碼塊，即可生成孩子的新照片

genes_influence = 0.8  # 性別影響因子，取值范圍[0.01, 0.99]，取值越接近0，父親的容貌影響越大，反之母親影響越大
person_age = 10  # 年齡影響因子，取值范圍[10, 50]，設置該值后，將生成對應年齡的小孩的容貌

style = "Default"
if style == "Father's photo":
    lr = ((np.arange(1, model_scale + 1) / model_scale) ** genes_influence).reshape((model_scale, 1))
    rl = 1 - lr
    hybrid_face = (lr * first_face) + (rl * second_face)
elif style == "Mother's photo":
    lr = ((np.arange(1, model_scale + 1) / model_scale) ** (1 - genes_influence)).reshape((model_scale, 1))
    rl = 1 - lr
    hybrid_face = (rl * first_face) + (lr * second_face)
else:
    hybrid_face = ((1 - genes_influence) * first_face) + (genes_influence * second_face)

intensity = -((person_age / 5) - 6)
resolution = "512"
size = int(resolution), int(resolution)

download_image = False
face = generate_final_image(hybrid_face, age_direction, intensity)
plot_three_images(face, fs=15)

9. 查看孩子各年齡段的容貌

請修改下面代碼中的 gender_influence 參數，該參數是性別影響因子，取值范圍[0.01, 0.99]，取值越接近0，父親的容貌影響越大，反之母親影響越大。

每次修改該參數值后，要重新運行下面的代碼塊

gender_influence = 0.8  # 性別影響因子，取值范圍[0.01, 0.99]，取值越接近0，父親的容貌影響越大，反之母親影響越大

!rm -rf ./for_animation
!mkdir ./for_animation
face_img = []
hybrid_face = ((1 - gender_influence) * first_face) + (gender_influence * second_face)
animation_resolution = "512"
animation_size = int(animation_resolution), int(animation_resolution)
frames_number = 50
download_image = False
for i in range(0, frames_number, 1):
    intensity = (8 * (i / (frames_number - 1))) - 4
    generate_final_images(hybrid_face, age_direction, intensity, i)
    clear_output()
    print(str(i) + " of {} photo generated".format(str(frames_number)))

for j in reversed(face_img):
    face_img.append(j)

automatic_download = False

if gender_influence <= 0.3:
    animation_name = "boy.mp4"
elif gender_influence >= 0.7:
    animation_name = "girl.mp4"
else:
    animation_name = "animation.mp4"

imageio.mimsave('./for_animation/' + animation_name, face_img)
clear_output()
display(mpy.ipython_display('./for_animation/' + animation_name, height=400, autoplay=1, loop=1))

10. 查看孩子不同性別的容貌

請修改下面代碼中的 person_age 參數，該參數是年齡影響因子，取值范圍[10, 50]，設置該值后，將生成對應年齡的小孩的容貌。

每次修改該參數值后，要重新運行下面的代碼塊

person_age = 10  # 小孩的年齡，取值范圍[10, 50]，設置該值后，將生成對應年齡的小孩的容貌

!rm -rf ./for_animation
!mkdir ./for_animation
face_img = []
intensity = -((person_age / 5) - 6)
animation_resolution = "512"
animation_size = int(animation_resolution), int(animation_resolution)
frames_number = 50  # 容貌變化的圖像數，取值范圍[10, 50]
download_image = False

for i in range(1, frames_number):
    gender_influence = i / frames_number
    hybrid_face = ((1 - gender_influence) * first_face) + (gender_influence * second_face)
    face = generate_final_images(hybrid_face, age_direction, intensity, i)
    clear_output()
    print(str(i) + " of {} photo generated".format(str(frames_number)))

for j in reversed(face_img):
    face_img.append(j)

animation_name = str(person_age) + "_years.mp4"
imageio.mimsave('./for_animation/' + animation_name, face_img)
clear_output()
display(mpy.ipython_display('./for_animation/' + animation_name, height=400, autoplay=1, loop=1))

11. 更換父親和母親的照片

接下來，你可以上傳自己感興趣的父母親照片到father_image 和 mother_image目錄下，重新運行代碼，即可生成新的孩子照片。

你需要按照如下規則和步驟進行：

1、參考下圖的操作，進入到 ma_share/BabyGAN 目錄；

2、准備一張父親的照片，上傳到 father_image 目錄下，命名必須為father.jpg；（如果你不知道上傳文件到 JupyterLab 的方法，請查看此文檔）

3、准備一張母親的照片，上傳到 mother_image 目錄下，命名必須為mother.jpg；

4、father_image 和 mother_image目錄都只允許存在一張照片；

5、重新運行步驟4~10的代碼。

 

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