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- import fitz
- import time
- import re
- import os
- from sim import compute_similarity
- from flask import redirect,url_for,Blueprint
- from PIL import Image
- import math
- import operator
- from functools import reduce
-
- bp_2pics = Blueprint("2pics", __name__,url_prefix="/2pics")
- # 这个bp似乎没啥用,,?
-
- class to_pics:
- def pdf2pic(self, path, pic_path):
-
- t0 = time.clock()
- # 使用正则表达式来查找图片
- checkXO = r"/Type(?= */XObject)"
- checkIM = r"/Subtype(?= */Image)"
-
- # 打开pdf
- doc = fitz.open(path)
- # 图片计数
- imgcount = 0
- lenXREF = doc._getXrefLength()
- print(lenXREF)
-
- # 打印PDF的信息
- print("文件名:{}, 页数: {}, 对象: {}".format(path, len(doc), lenXREF - 1))
-
- # 遍历每一个对象
- for i in range(1, lenXREF):
- # 定义对象字符串
- text = doc._getXrefString(i)
- isXObject = re.search(checkXO, text)
- # 使用正则表达式查看是否是图片
- isImage = re.search(checkIM, text)
-
- # 如果不是对象也不是图片,则continue
- if not isXObject or not isImage:
- continue
- imgcount += 1
- # 根据索引生成图像
- pix = fitz.Pixmap(doc, i)
- # 根据pdf的路径生成图片的名称
- # new_name = path.replace('\\', '_') + "_img{}.png".format(imgcount)
- new_name = "img{}.png".format(imgcount)
- new_name = new_name.replace(':', '')
-
- # 如果pix.n<5,可以直接存为PNG
- if pix.n < 5:
- pix.writePNG(os.path.join(pic_path, new_name))
- # 否则先转换CMYK
- else:
- pix0 = fitz.Pixmap(fitz.csRGB, pix)
- pix0.writePNG(os.path.join(pic_path, new_name))
- pix0 = None
- # 释放资源
- pix = None
- t1 = time.clock()
- print("运行时间:{}s".format(t1 - t0))
- print("提取了{}张图片".format(imgcount))
- return str(imgcount)
-
-
- def call_pdf2pic(self, file):
- # pdf路径
- path = './upload/' + file
- pic_path = path[:-4]
- # 创建保存图片的文件夹
- if os.path.exists(pic_path):
- print("文件夹已存在,请重新创建新文件夹!")
- return "already exist"
- # raise SystemExit
- else:
- os.mkdir(pic_path)
- print(pic_path)
- m = to_pics().pdf2pic(path, pic_path)
- # return m
- return redirect(url_for('call_sim',path = file[:-4]))
- # return redirect(url_for('call_sim', m=m, pic_path=pic_path))
-
-
- # @bp_2pics.route('/tt/<m>/<pic_path>')
- # def call_sim(m, pic_path):
- # message = app.similarity(m, pic_path)
- # print("call_sim")
- # return message
-
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