Python批量裁剪图形外围空白区域

Posted 2021-08-13 空中旋转篮球

1.描述

图形外围空白区域比较多，需要裁剪掉，这样的图形有很多，需要批量处理

 2.代码

from PIL import Image
import numpy as np
import os

imagesDirectory = r"D:\\PycharmProjects\\pythonProject\\indias\\IndiasSample1"  # tiff图片所在文件夹路径
x_top=200;x_left=200;x_right=0;x_bottom=0 #上下左右范围
for imageName in os.listdir(imagesDirectory):
    imagePath = os.path.join(imagesDirectory, imageName)
    image = Image.open(imagePath)  # 打开tiff图像
    ImageArray=np.array(image)
    row=ImageArray.shape[0]
    col=ImageArray.shape[1]
    for row in range(row):
        for col in range(col):
            if ImageArray[row][col][0]<255:
                if x_top>row:
                    x_top=row    #获取最小x_top
                if x_left>col:
                    x_left=col  #获取最小x_left
                if x_bottom<row:
                    x_bottom=row    #获取最大x_bottom
                if x_right<col:
                    x_right=col    #获取最大x_right

    i=0
for imageName in os.listdir(imagesDirectory):
    imagePath = os.path.join(imagesDirectory, imageName)
    image = Image.open(imagePath)  # 打开tiff图像
    cropped = image.crop( (x_left ,x_top , x_right+10,  x_bottom+10 ))  # (left, upper, right, lower)
    i+=1;
    cropped.save("D:\\PycharmProjects\\pythonProject\\indias\\cutimages\\{}.jpg".format(imageName,i))

 3.效果

裁剪前：

 

裁剪后：