样本扩增

改变亮度、对比第、角度、镜像

from PIL import ImageEnhance
import os
import numpy as np
from PIL import Image

def brightnessEnhancement(root_path,img_name):#亮度增强
    image = Image.open(os.path.join(root_path, img_name))
    enh_bri = ImageEnhance.Brightness(image)
    # brightness = 1.1+0.4*np.random.random()#取值范围1.1-1.5
    brightness = 1.5
    image_brightened = enh_bri.enhance(brightness)
    return image_brightened


def contrastEnhancement(root_path, img_name):  # 对比度增强
    image = Image.open(os.path.join(root_path, img_name))
    enh_con = ImageEnhance.Contrast(image)
    # contrast = 1.1+0.4*np.random.random()#取值范围1.1-1.5
    contrast = 1.5
    image_contrasted = enh_con.enhance(contrast)
    return image_contrasted

def rotation(root_path, img_name):
    img = Image.open(os.path.join(root_path, img_name))
    random_angle = np.random.randint(-2, 2)*90
    if random_angle==0:
        rotation_img = img.rotate(-90) #旋转角度
    else:
        rotation_img = img.rotate( random_angle)  # 旋转角度
    # rotation_img.save(os.path.join(root_path,img_name.split('.')[0] + '_rotation.bmp'))
    return rotation_img

def flip(root_path,img_name):   #翻转图像
    img = Image.open(os.path.join(root_path, img_name))
    filp_img = img.transpose(Image.FLIP_LEFT_RIGHT)     #左右翻转
    # filp_img.save(os.path.join(root_path,img_name.split('.')[0] + '_flip.bmp'))
    return filp_img


def createImage(imageDir,saveDir):
   i=0
   for name in os.listdir(imageDir):
      i=i+1
      saveName="cesun"+str(i)+".bmp"
      saveImage=contrastEnhancement(imageDir,name)
      saveImage.save(os.path.join(saveDir,saveName))
      saveName1 = "flip" + str(i) + ".bmp"
      saveImage1 = flip(imageDir,name)
      saveImage1.save(os.path.join(saveDir, saveName1))
      saveName2 = "brightnessE" + str(i) + ".bmp"
      saveImage2 = brightnessEnhancement(imageDir, name)
      saveImage2.save(os.path.join(saveDir, saveName2))
      saveName3 = "rotate" + str(i) + ".bmp"
      saveImage = rotation(imageDir, name)
      saveImage.save(os.path.join(saveDir, saveName3))

if __name__ == '__main__':

    # 设置图片路径
    filepath = 'C:/Users/Administrator/Desktop/images'

    # 设置扩充保存图片路径
    savefilepath = 'C:/Users/Administrator/Desktop/imagesExp'
    createImage(filepath,savefilepath)