Python 结合opencv实现图片截取和拼接
实践环境python 3.6.2
scikit-build-0.16.7
win10
opencv_python-4.5.4.60-cp36-cp36m-win_amd64.whl
下载地址：
https://pypi.org/project/opencv-python/4.5.4.60/#files
https://files.pythonhosted.org/packages/57/6c/7f4f56b2555d5c25dd4f41fc72a16dc6402cb2b4f967da11d8d26c669b55/opencv_python-4.5.4.60-cp36-cp36m-win_amd64.whl
注意：下载时不用下abi版的，比如 opencv_python-4.6.0.66-cp36-abi3-win_amd64.whl 不能用，
因为数据类型为 np.uint8,也就是0~255,
依赖包安装
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple scikit-build # 解决 ModuleNotFoundError: No module named 'skbuild'问题
pip install opencv_python-4.5.4.60-cp36-cp36m-win_amd64.whl代码实践
示例图片
代码
import os
import numpy as np
import cv2
from datetime import datetime
from PIL import Image
def capture_image(image_file_path, left, upper, width, height, target_file_name=None):
'''截取图片'''
right = left + width
lower = upper + height
if os.path.exists(image_file_path):
image = Image.open(image_file_path)
# width, height = image.size
# print('图片宽度', width, '图片高度', height)
head, ext = os.path.splitext(image_file_path)
if not target_file_name:
target_file_name = 'pic_captured%s%s' % (datetime.now().strftime('%Y%m%d%H%M%S%f'), ext)
target_file_path = '%s%s' % (head, target_file_name)
image.crop((left, upper, right, lower)).save(target_file_path)
return target_file_path
else:
error_msg = '图片文件路径不存在：%s' % image_file_path
print(error_msg)
raise Exception(error_msg)
def append_picture(image1_path, image2_path):
'''拼接图片'''
image1 = cv2.imread(image1_path, -1)
shape = image1.shape
height1, width1, channel1 = shape
# print(shape) # 输出：(315, 510, 4)
# print(image1) # 输出一3维数组
# print(len(image1), len(image1))# 输出：315 510
image2 = cv2.imread(image2_path, -1)
height2, width2, channel2 =image2.shape
total_height = max(height1, height2)
total_width = width1 + width2
dst = np.zeros((total_height, total_width, channel1), np.uint8)
dst = image1
dst = image2
cv2.imwrite("merge.png", dst)
if __name__ == '__main__':
# 截取图片
image_path1 = capture_image('example.png', 10, 30, 510, 315)
image_path2 = capture_image('example.png', 520, 30, 518, 315)
append_picture(image_path1, image_path2)运行结果
截取的图片
合并的图片
代码补充说明
来源:https://www.cnblogs.com/shouke/p/17727001.html
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