def generate(self):
os.chdir(self.path)
img = Image(self.filename)
img.sample("128x128")
name = self.filename.split('.')[0]
img.write(name + '.ico')
print(f'>>> 成功写出文件：{self.path + name}.ico')
def extractCover(uuid, data):
"""Extract the cover, resize, and save."""
f = NamedTemporaryFile(delete=False)
f.write(data)
f.close()
image = Image(f.name)
image.magick('JPEG')
image.sample('256x256')
image.write('htdocs/images/'+uuid+'.jpg')
unlink(f.name)
def pad_image_to_x480(file):
from PythonMagick import Image, CompositeOperator
fname = file.split(".")[0]
ext = file.split(".")[-1]
outfile = os.path.join(destdir, fname + "_" + "l" + ".jpg")
## Make BG layer
bgimg = Image('400x480', 'white')
## Open Primary image
img = Image(file)
img.backgroundColor("white")
img.sample('350x432')
# Composite + Save Primary over bg, padding primary with white of bg
type = img.type
img.composite(bgimg, 0, 0, CompositeOperator.DstOverCompositeOp)
img.magick('JPG')
img.type = type
img.quality(100)
img.write(outfile)
def convert(file_name, target_width=1500):
try:
with Image(filename=file_name) as img:
image_page_num = len(img.sequence)
# PDF里面只有一张图片
if image_page_num == 1:
# 获取最终图片宽高
target_width, target_height = _get_one_info(
target_width, img.width, img.height)
# 缩放，文档上说比resize速度快
img.sample(target_width, target_height)
# 如果最终高度大于百度最大高度，则crop
if target_height > bai_du_ocr_max:
img.crop(0, 0, target_width, bai_du_ocr_max)
# img.save(filename='%s.jpg' % (str(int(time.time())) + '_' +
# str(img.width)))
result = img.make_blob('jpg')
# 下面是准备二值化，发现总体速度还不如直接传给百度
# paste_image =
# PImage.open(StringIO.StringIO(img.make_blob('jpg')))
# paste_image = paste_image.convert("L")
# paste_image.show()
# d = StringIO.StringIO()
# paste_image.save(d, 'JPEG')
# result = d.getvalue()
# PDF里面有一张以上图片
else:
# 多张时，获取最终宽高、拼接页数
target_width, target_height, page_num = _get_more_info(
target_width, img.width, img.height, image_page_num)
# 生成粘贴的背景图 (测试多次，发现L比RGB快)
paste_image = PImage.new('L', (target_width, target_height))
# 拼接图片
for i in range(0, page_num):
image = Image(image=img.sequence[i])
# 计算一张图的高度
one_img_height = int(target_height / page_num)
# 缩放
image.sample(target_width, one_img_height)
# 将wand库文件转成PIL库文件
pasted_image = PImage.open(
StringIO.StringIO(image.make_blob('jpg')))
# 将图片粘贴到背景图
paste_image.paste(pasted_image, (0, one_img_height * i))
# 如果最终高度大于百度最大高度，则crop
if target_height > bai_du_ocr_max:
paste_image = paste_image.crop(
(0, 0, target_width, bai_du_ocr_max))
# 从内存中读取文件
d = StringIO.StringIO()
# 这里是JPEG不是JPG
paste_image.save(d, 'JPEG')
result = d.getvalue()
# paste_image.save('%s.jpg' % (str(int(time.time())) + '_' +
# str(img.width)))
# 测试的时候可以打开
# paste_image.show()
except Exception as e:
print(e)
result = False
return result
def pngtoico(filename): #png转ico
from PythonMagick import Image # https://www.lfd.uci.edu/~gohlke/pythonlibs/#pythonmagick
img = Image(filename)
# 这里要设置一下尺寸，不然会报ico尺寸异常错误
img.sample('128x128')
img.write(filename.split('.')[0] + '.ico')
import os
from PyPDF4 import PdfFileReader, PdfFileWriter
from tempfile import NamedTemporaryFile
from PythonMagick import Image
reader = PdfFileReader(open("D:/data/pdf-scan/普通生物学（清晰PDF版）.pdf", "rb"))
for page_num in range(reader.getNumPages()):
writer = PdfFileWriter()
writer.addPage(reader.getPage(page_num))
temp = NamedTemporaryFile(prefix=str(page_num), suffix=".pdf", delete=False)
writer.write(temp)
print(temp.name)
tempname = temp.name
temp.close()
im = Image(tempname)
im.quality(100) # 0-100 full compression
# 不保持比例
#im.sample('298x412!')
# 保持比例
im.sample('1788x2526')
#im.density("3000") # DPI, for better quality
# im.read(tempname)
im.write("D:/data/pdf-scan/temp-pdf/{}.jpeg".format(page_num))
os.remove(tempname)
