Python欢乐小技巧，照片秒变表情包

在日常生活中，我们经常会存取一些朋友们的丑照，在这个项目中，我们以萌萌哒的熊猫头作为背景，然后试着在背景图上加入朋友们的照片。效果如下图所示：










二、实现步骤

导入朋友的照片（前景照片）；处理前景照片（缩放、旋转，填充）；导入熊猫头照片（背景照片）；将前景和背景拼接起来形成表情包；在表情包下面添加文字。

三、Python 实现

1、导入需要的库

import cv2import numpy as mpimport matplotlib.pyplot as pltfrom PIL import Image, ImageDraw, ImageFont
2、绘图函数


def plt_show(img):    imageRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)    plt.imshow(imageRGB)    plt.show()3、导入前景照片

image = cv2.imread('SXC.jpg', 0)  # 导入灰度图即可plt_show(image)


4、等比例缩放前景照片


image_resize = cv2.resize(image, None, fx=0.3, fy=0.3, interpolation = cv2.INTER_CUBIC)plt_show(image_resize)


5、对前景照片进行二值化处理


ret, image_binary = cv2.threshold(image_resize, 80, 255, cv2.THRESH_BINARY)plt_show(image_binary)


6、提取出感兴趣区域

image_roi = image_binary[74: 185, 0: 150]plt_show(image_roi)


7、旋转图片


rows, cols = image_roi.shapeM = cv2.getRotationMatrix2D(((cols-1)/2.0, (rows-1)/2.0), 15, 1)  # （旋转中心，逆时针旋转角度，各个方向同等扩大比例）image_rotate = cv2.warpAffine(image_roi, M, (140, 130))  # (140, 130) 是指旋转后的画布大小plt_show(image_rotate)


8、将一些不需要的黑色区域删除掉


h, w = image_rotate.shapeimage_rotate_copy = image_rotate.copy()pts1 = np.array([[0, 20],  [64, 0], [0, 0]], np.int32)pts2 = np.array([[0, 18],  [0, h], [80, h]], np.int32)pts3 = np.array([[0, 100],  [0, h], [w, h], [w, 100]], np.int32)pts4 = np.array([[111, 0],  [w, 0], [w, 30]], np.int32)pts5 = np.array([[124, 0],  [115, h], [w, h]], np.int32)pts6 = np.array([[120, 40],  [95, 100], [120, 100]], np.int32)foreground = cv2.fillPoly(image_rotate_copy, [pts1], (255, 255, 255))  # (图片，填充区域，填充颜色)foreground = cv2.fillPoly(image_rotate_copy, [pts2], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts3], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts4], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts5], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts6], (255, 255, 255))plt_show(foreground)


9、再次提取感兴趣区域并缩放

foreground_roi = foreground[0: 93, 0: 125]plt_show(foreground_roi)foreground_roi_resize = cv2.resize(foreground_roi, None, fx=2.5, fy=2.5, interpolation = cv2.INTER_CUBIC)plt_show(foreground_roi_resize)





10、导入背景图片

background = cv2.imread('back.jpg', 0)plt_show(background)


11、组合两张图片成表情包

h_f, w_f = foreground.shapeh_b, w_b = background.shapeleft = (w_b - w_f)//2  # 前景图片在背景图片中的左边的横坐标right = left + w_f  # 前景图片在背景图片中的右边的横坐标top = 100  # 前景图片在背景图片中的上边的纵坐标bottom = top + h_f  # 前景图片在背景图片中的下边的纵坐标emoji = backgroundemoji[top: bottom, left: right] = foregroundplt_show(emoji)


12、在表情包下面添加文本

12.1 添加英文文本


emoji_copy = emoji.copy()# （图片，文本，位置，字体，文本大小，文本颜色，文本粗细）cv2.putText(emoji_copy, "FXXK!!", (210, 500), cv2.FONT_HERSHEY_SIMPLEX, 1.2, (0, 0, 0), 5)plt_show(emoji_copy)


12.2 添加中文文本


PilImg = Image.fromarray(emoji)  # cv2 转 PILdraw = ImageDraw.Draw(PilImg)  # 创建画笔ttfront = ImageFont.truetype('simhei.ttf', 34)  # 设置字体draw.text((210, 450),"你瞅啥！！",fill=0, font=ttfront)  # （位置，文本，文本颜色，字体）emoji_text = cv2.cvtColor(np.array(PilImg),cv2.COLOR_RGB2BGR)  # PIL 转回 cv2plt_show(emoji_text)


13、保存表情包

cv2.imwrite('./emoji.png', np.array(emoji_text))四、完整代码

import cv2import numpy as mpimport matplotlib.pyplot as pltfrom PIL import Image, ImageDraw, ImageFontdef plt_show(img):    imageRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)    plt.imshow(imageRGB)    plt.show()image = cv2.imread('SXC.jpg', 0)  # 导入前景图片image_resize = cv2.resize(image, None, fx=0.3, fy=0.3, interpolation = cv2.INTER_CUBIC)  # 缩放ret, image_binary = cv2.threshold(image_resize, 80, 255, cv2.THRESH_BINARY)  # 图片二值化image_roi = image_binary[74: 185, 0: 150]  # 感兴趣区域rows, cols = image_roi.shape# 旋转M = cv2.getRotationMatrix2D(((cols-1)/2.0, (rows-1)/2.0), 15, 1)image_rotate = cv2.warpAffine(image_roi, M, (140, 130))# 填充不需要的区域h, w = image_rotate.shapeimage_rotate_copy = image_rotate.copy()pts1 = np.array([[0, 20],  [64, 0], [0, 0]], np.int32)pts2 = np.array([[0, 18],  [0, h], [80, h]], np.int32)pts3 = np.array([[0, 100],  [0, h], [w, h], [w, 100]], np.int32)pts4 = np.array([[111, 0],  [w, 0], [w, 30]], np.int32)pts5 = np.array([[124, 0],  [115, h], [w, h]], np.int32)pts6 = np.array([[120, 40],  [95, 100], [120, 100]], np.int32)foreground = cv2.fillPoly(image_rotate_copy, [pts1], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts2], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts3], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts4], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts5], (255, 255, 255))foreground = cv2.fillPoly(image_rotate_copy, [pts6], (255, 255, 255))foreground_roi = foreground[0: 93, 0: 125]foreground_roi_resize = cv2.resize(foreground_roi, None, fx=2.5, fy=2.5, interpolation = cv2.INTER_CUBIC)background = cv2.imread('back.jpg', 0)  # 导入背景图片# 拼接两张图片h_f, w_f = foreground_roi_resize.shapeh_b, w_b = background.shapeleft = (w_b - w_f)//2right = left + w_ftop = 80bottom = top + h_femoji = backgroundemoji[top: bottom, left: right] = foreground_roi_resizePilImg = Image.fromarray(emoji)  # cv2 转 PILdraw = ImageDraw.Draw(PilImg)  # 创建画笔ttfront = ImageFont.truetype('simhei.ttf', 34)  # 设置字体draw.text((210, 450),"你瞅啥！！",fill=0, font=ttfront)  # （位置，文本，文本颜色，字体）emoji_text = cv2.cvtColor(np.array(PilImg),cv2.COLOR_RGB2BGR)  # PIL 转回 cv2cv2.imwrite('./emoji.png', np.array(emoji_text))  # 保存表情包
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