批量图片存为同一个pdf

Posted 2020-12-21 勇敢起来 站起来

原文链接：https://blog.csdn.net/zhezhebie/article/details/88847458

 

python将图片转换为pdf,代码如下:

from reportlab.pdfgen import canvas
from reportlab.lib.units import inch, cm
from reportlab.lib.pagesizes import letter
from reportlab.platypus import SimpleDocTemplate, Paragraph, Image, PageBreak
from reportlab.lib.pagesizes import A4,A3,A2,A1, legal, landscape
from reportlab.lib.utils import ImageReader
import PIL.Image,PIL.ExifTags
from os import listdir
import os,re
import time
from reportlab.lib.units import inch

def img_search(mypath, filenames):
    for lists in os.listdir(mypath):
        path = os.path.join(mypath,lists)
        if os.path.isfile(path):
            expression = r‘[w]+.(jpg|png|jpeg)$‘
            if re.search(expression, path, re.IGNORECASE):
                filenames.append(path)
        elif os.path.isdir(path):
            img_search(path, filenames)


def img_search1(mypath, filenames):
    for lists in os.listdir(mypath):
        path = os.path.join(mypath,lists)
        if os.path.isfile(path):
            a = path.split(‘.‘)
            if a[-1] in [‘jpg‘, ‘png‘, ‘JPEG‘]:
                filenames.append(path)
        elif os.path.isdir(path):
            img_search1(path,filenames)


def rotate_img_to_proper(image):
    try:
        # image = Image.open(filename)
        if hasattr(image, ‘_getexif‘):  # only present in JPEGs
            for orientation in PIL.ExifTags.TAGS.keys():
                if PIL.ExifTags.TAGS[orientation] == ‘Orientation‘:
                    break
            e = image._getexif()  # returns None if no EXIF data
            if e is not None:
                #log.info(‘EXIF data found: %r‘, e)
                exif = dict(e.items())
                orientation = exif[orientation]
                # print(‘found, ‘,orientation)

                if orientation == 3:
                    image = image.transpose(Image.ROTATE_180)
                elif orientation == 6:
                    image = image.transpose(Image.ROTATE_270)
                elif orientation == 8:
                    image = image.rotate(90,expand=True)
    except:
        pass
    return image


def main(src_folder=None):
    output_file_name = ‘out.pdf‘
    #save_file_name = ‘ex.pdf‘
    #doc = SimpleDocTemplate(save_file_name, pagesize=A1,
    #                     rightMargin=72, leftMargin=72,
    #                     topMargin=72, bottomMargin=18)
    imgDoc = canvas.Canvas(output_file_name)#pagesize=letter
    imgDoc.setPageSize(A4)
    document_width,document_height = A4
    if src_folder is None: mypath = input(‘Input the image folder please:‘)
    else: mypath = src_folder
    filenames=[]
    start = time.clock()
    img_search(mypath, filenames)
    end = time.clock()
    print(‘find file cost time: ‘, end-start, ‘find files: ‘, len(filenames))
    # for f in filenames:
    #     print(f)
    for image in filenames:
        try:
            image_file = PIL.Image.open(image)
            image_file = rotate_img_to_proper(image_file)

            image_width, image_height = image_file.size
            print(‘img size:‘, image_file.size)
            if not(image_width>0 and image_height>0):
                raise Exception
            image_aspect = image_height/float(image_width)
            #Determins the demensions of the image in the overview
            print_width  = document_width
            print_height = document_width*image_aspect
            imgDoc.drawImage(ImageReader(image_file),document_width-print_width,
                         document_height-print_height,width=print_width,
                             height=print_height,preserveAspectRatio=True)
            #inform the reportlab we want a new page
            imgDoc.showPage()
        except Exception as e:
            print(‘error:‘,e,image)
    imgDoc.save()
    print(‘Done‘)


if __name__ == ‘__main__‘:
    main(src_folder=‘C:\Users\Administrator\Desktop\L1-U5-L3‘);

　　

 

• 1

有个问题,转换成pdf后,体积变非常大.只是测试了一下.图片32张,单张图片100kb左右,加起来3M左右,但是转换完pdf之后pdf文件有26M,这是不能接受的.