如何使用Rawpy图像处理库从URL读取图像？
如何使用Rawpy图像处理库从URL读取图像？
提问于 2022-01-27 09:03:33
如何使用rawpy库从url读取图像？
我试过了
filepath = www.google.com/image.jpeg
im = rawpy.imread(filepath)但不起作用。
我更深入地研究了rawpy的代码，它说它采用“路径或文件”。
我也尝试过其他方法，比如使用tempfile (内存中的一个对象，BytesIO )，但这些方法都不起作用。
请帮我一把。
编辑一：
关于urllib.request库，我得到了以下错误：
i)
import rawpy
import io
import urllib
filepath = 'https://filesamples.com/samples/image/jpeg/sample_640%C3%97426.jpeg'
data = urllib.request.urlopen(filepath).read()
stream = io.BytesIO(data)
im = rawpy.imread(stream)产生的误差
LibRawFileUnsupportedError Traceback (most recent call last)
<ipython-input-88-7965dccc6908> in <module>
35 stream = io.BytesIO(data)
---> 36 im = rawpy.imread(stream)
37
38 """
~/anaconda3/envs/tensorflow2_p36/lib/python3.6/site-packages/rawpy/__init__.py in imread(pathOrFile)
16 d = RawPy()
17 if hasattr(pathOrFile, 'read'):
---> 18 d.open_buffer(pathOrFile)
19 else:
20 d.open_file(pathOrFile)
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.open_buffer()
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.handle_error()
LibRawFileUnsupportedError: b'Unsupported file format or not RAW file'ii)
import rawpy
import io
import urllib
import tempfile
import shutil
filepath = 'https://filesamples.com/samples/image/jpeg/sample_640%C3%97426.jpeg'
with urllib.request.urlopen(filepath) as response:
with tempfile.NamedTemporaryFile(delete = False) as tmp_file:
shutil.copyfileobj(response,tmp_file)
im = rawpy.imread(tmp_file)产生的误差
LibRawIOError Traceback (most recent call last)
<ipython-input-89-ae0405bcc04a> in <module>
42 shutil.copyfileobj(response,tmp_file)
---> 43 im = rawpy.imread(tmp_file)
44
~/anaconda3/envs/tensorflow2_p36/lib/python3.6/site-packages/rawpy/__init__.py in imread(pathOrFile)
16 d = RawPy()
17 if hasattr(pathOrFile, 'read'):
---> 18 d.open_buffer(pathOrFile)
19 else:
20 d.open_file(pathOrFile)
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.open_buffer()
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.handle_error()
LibRawIOError: b'Input/output error'(三)
import rawpy
import io
import urllib
import tempfile
import shutil
filepath = 'https://filesamples.com/samples/image/jpeg/sample_640%C3%97426.jpeg'
with urllib.request.urlopen(filepath) as response:
data = response.read()
im = rawpy.imread(data)产生的误差
AttributeError Traceback (most recent call last)
<ipython-input-90-f10bfdef4333> in <module>
55 data = response.read()
---> 56 im = rawpy.imread(data)
57
~/anaconda3/envs/tensorflow2_p36/lib/python3.6/site-packages/rawpy/__init__.py in imread(pathOrFile)
18 d.open_buffer(pathOrFile)
19 else:
---> 20 d.open_file(pathOrFile)
21 return d
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.open_file()
AttributeError: 'bytes' object has no attribute 'encode'编辑二:我尝试过的其他没有使用urllib库的东西是
( i)在内存文件中
import io
import rawpy
filepath = 'https://filesamples.com/samples/image/jpeg/sample_640%C3%97426.jpeg'
response = requests.get(filepath)
in_mem_file = io.BytesIO(response.content)
im = rawpy.imread(in_mem_file)产生的误差
LibRawFileUnsupportedError Traceback (most recent call last)
<ipython-input-91-1ef650bdc042> in <module>
48 response = requests.get(filepath)
49 in_mem_file = io.BytesIO(response.content)
---> 50 im = rawpy.imread(in_mem_file)
51
~/anaconda3/envs/tensorflow2_p36/lib/python3.6/site-packages/rawpy/__init__.py in imread(pathOrFile)
16 d = RawPy()
17 if hasattr(pathOrFile, 'read'):
---> 18 d.open_buffer(pathOrFile)
19 else:
20 d.open_file(pathOrFile)
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.open_buffer()
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.handle_error()
LibRawFileUnsupportedError: b'Unsupported file format or not RAW file'( ii)智能开启
from smart_open import open
import rawpy
filepath = 'https://filesamples.com/samples/image/jpeg/sample_640%C3%97426.jpeg'
def get_file(filepath):
with open(filepath, 'rb') as s3_source:
return s3_source
s3_source = get_file(filepath)
im = rawpy.imread(s3_source)产生的误差
LibRawIOError Traceback (most recent call last)
<ipython-input-92-03b94616ed66> in <module>
55 return s3_source
56 s3_source = get_file(filepath)
---> 57 im = rawpy.imread(s3_source)
~/anaconda3/envs/tensorflow2_p36/lib/python3.6/site-packages/rawpy/__init__.py in imread(pathOrFile)
16 d = RawPy()
17 if hasattr(pathOrFile, 'read'):
---> 18 d.open_buffer(pathOrFile)
19 else:
20 d.open_file(pathOrFile)
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.open_buffer()
rawpy/_rawpy.pyx in rawpy._rawpy.RawPy.handle_error()
LibRawIOError: b'Input/output error'编辑三(解决方案)：
好的，我通过使用原始图像格式数据(.dng)来解决这个问题。
这是我的密码
import rawpy
import BytesIO
import imageio
filepath = 'www.google.com/sample_file.dng'
response = requests.get(filepath)
raw = rawpy.imread(BytesIO(response.content))
rgb = raw.postprocess()
imageio.imsave('test_rawpy.jpeg', rgb)Stack Overflow用户
回答已采纳
发布于 2022-01-27 12:20:43
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/70875810
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