Re: Converting hex data to image
On Friday, November 15, 2013 at 3:52:58 AM UTC+5:30, Shyam Parimal Katti wrote:
> Perfect. Thank you @Ben and @Tim
>
>
>
>
> On Thu, Nov 14, 2013 at 4:29 PM, Ben Finney wrote:
>
>
> Ben Finney writes:
>
>
>
>
> > To turn a byte string into a file-like object for use with PIL, extract
>
> > the byte string as ‘image_data’, use the standard library ‘io.StringIO’
>
> > class http://docs.python.org/3/library/io.html#io.StringIO>, then
>
> > create a new ‘PIL.Image’ object by reading from that pseudo-file::
>
>
>
> My apologies, I showed the wrong usage. This should work::
>
>
>
>
> import io
>
>
>
> import PIL
>
>
>
> photo_data = # … get the byte string from wherever it is …
>
> photo_infile = io.StringIO(photo_data)
>
> photo_image = PIL.Image.open(photo_infile)
>
>
>
> That is, ‘PIL.Image.frombytes’ allows you to read the bytes from a byte
>
> string, but requires you to also specify metadata about the image data
>
> (format, pixel mode, size), whereas ‘PIL.Image.open’ reads the data from
>
> a file-like object and parses all the metadata. So you usually want to
>
> use the latter, as shown here.
>
>
>
> --
>
> \ “People's Front To Reunite Gondwanaland: Stop the Laurasian |
>
> `\ Separatist Movement!” —wiredog, http://kuro5hin.org/ |
>
>
>
> _o__) |
>
> Ben Finney
>
>
>
> --
>
> https://mail.python.org/mailman/listinfo/python-list
Hi i have a similar challenge where i need to store the thumbnailPhoto
attribute to my local db and display the image every-time user logs in. But
this solution does work .
data looks like this:
\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00
\x08\x06\x06\x07\x06\x05\x08\x07\x07\x07\t\t\x08\n\x0c\x14\r\x0c\x0b\x0b\x0c\x19\x12\x13\x0f\x14\x1d\x1a\x1f\x1e\x1d\x1a\x1c\x1c
$.\'
",#\x1c\x1c(7),01444\x1f\'9=82<.342\xff\xdb\x00C\x01\t\t\t\x0c\x0b\x0c\x18\r\r\x182!\x1c!2
import PIL
from PIL import Image
import io
data = open("bytes.txt")
my_data=(data.read())
photo_inline = io.StringIO(my_data)
photo = PIL.Image.open(photo_inline)
error:
Traceback (most recent call last):
File "convertToImage.py", line 9, in
photo = PIL.Image.open(photo_inline)
File "", line 2657, in open
% (filename if filename else fp))
OSError: cannot identify image file <_io.StringIO object at 0x0367FD00>
--
https://mail.python.org/mailman/listinfo/python-list
Re: Converting hex data to image
On Monday, March 11, 2019 at 4:32:48 PM UTC+5:30, Peter Otten wrote:
> dimplemathew...@gmail.com wrote:
>
> > Hi i have a similar challenge where i need to store the thumbnailPhoto
> > attribute to my local db and display the image every-time user logs in.
> > But this solution does work . data looks like this:
> >
> \xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00
>
> > import PIL
> > from PIL import Image
> > import io
> > data = open("bytes.txt")
> > my_data=(data.read())
> > photo_inline = io.StringIO(my_data)
> > photo = PIL.Image.open(photo_inline)
> > error:
> > Traceback (most recent call last):
> > File "convertToImage.py", line 9, in
> > photo = PIL.Image.open(photo_inline)
> > File "", line 2657, in open
> > % (filename if filename else fp))
> > OSError: cannot identify image file <_io.StringIO object at 0x0367FD00>
>
> Did you try
>
> photo = PIL.Image.open("bytes.txt")
>
> ?
>
> If the above code is illustrative, and you really need the bytes in memory
> remember to open the file in binary mode:
>
> with open("bytes.txt", "rb") as instream:
> data = instream.read()
>
> To create the image later the file-like objects needs to produce bytes:
>
> instream = io.BytesIO(data) # not StringIO!
> photo = Image.open(instream)
Hey,
It shows the same error.
I am actually getting that image from ldap in bytes:
'\xef\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00\x08\x06\x06\x07\x06\x05\x08\x07\x07\x07\t\t\x08\n\x0c\x14\r\x0c.
I want to display this image on my template.
--
https://mail.python.org/mailman/listinfo/python-list
Re: Converting hex data to image
On Thursday, November 14, 2013 at 9:02:52 PM UTC+5:30, Shyam Parimal Katti
wrote:
> I am implementing an authentication system(in Django) using LDAP as the
> backend(django-auth-ldap). When we fetch the data from the LDAP server for a
> particular valid user, the data associated with the user contains the
> thumbnail photo in hex representation. E.x.:
>
>
> [('CN=XX,OU=Users,OU=Accounts,DC=test,DC=com', {'msExchBlockedSendersHash':
> ['\xce'], 'mailNickname': ['test_user'], 'primaryGroupID': ['513'],
> 'logonCount': ['1021'], thumbnailPhoto:
> ['\xef\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00\x08\x06\x06\x07\x06\x05\x08\x07\x07\x07\t\t\x08\n\x0c\x14\r\x0c.']
> .. ]
>
>
> How do I convert the hex data for an image to the actual image?
>
> Any help would be greatly appreciated.
>
>
> Thanks,
> Shyam
Hey,
It shows the same error.
I am actually getting that image from ldap in bytes:
'\xef\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00\x08\x06\x06\x07\x06\x05\x08\x07\x07\x07\t\t\x08\n\x0c\x14\r\x0c.
I want to display this image on my template.
--
https://mail.python.org/mailman/listinfo/python-list
Re: Converting hex data to image
On Tuesday, March 12, 2019 at 2:09:06 PM UTC+5:30, Peter Otten wrote:
> dimplemathew...@gmail.com wrote:
>
> > On Monday, March 11, 2019 at 4:32:48 PM UTC+5:30, Peter Otten wrote:
> >> dimplemathew...@gmail.com wrote:
> >>
> >> > Hi i have a similar challenge where i need to store the thumbnailPhoto
> >> > attribute to my local db and display the image every-time user logs in.
> >> > But this solution does work . data looks like this:
> >> >
> >>
> \xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00
> >>
> >> > import PIL
> >> > from PIL import Image
> >> > import io
> >> > data = open("bytes.txt")
> >> > my_data=(data.read())
> >> > photo_inline = io.StringIO(my_data)
> >> > photo = PIL.Image.open(photo_inline)
> >> > error:
> >> > Traceback (most recent call last):
> >> > File "convertToImage.py", line 9, in
> >> > photo = PIL.Image.open(photo_inline)
> >> > File "", line 2657, in open
> >> > % (filename if filename else fp))
> >> > OSError: cannot identify image file <_io.StringIO object at 0x0367FD00>
> >>
> >> Did you try
> >>
> >> photo = PIL.Image.open("bytes.txt")
> >>
> >> ?
> >>
> >> If the above code is illustrative, and you really need the bytes in
> >> memory remember to open the file in binary mode:
> >>
> >> with open("bytes.txt", "rb") as instream:
> >> data = instream.read()
> >>
> >> To create the image later the file-like objects needs to produce bytes:
> >>
> >> instream = io.BytesIO(data) # not StringIO!
> >> photo = Image.open(instream)
> >
> > Hey,
> > It shows the same error.
> > I am actually getting that image from ldap in bytes:
> >
> '\xef\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00\xff\xdb\x00C\x00\x08\x06\x06\x07\x06\x05\x08\x07\x07\x07\t\t\x08\n\x0c\x14\r\x0c.
> > I want to display this image on my template.
>
> Save the image to a file (in binary mode!) and then try to open it with an
> image viewer. The data may be corrupted.
When i tried doing that it says Invalid Image...
--
https://mail.python.org/mailman/listinfo/python-list
Re: Converting hex data to image
On Tuesday, March 12, 2019 at 2:53:49 PM UTC+5:30, Peter Otten wrote:
> dimplemathew...@gmail.com wrote:
>
> >> Save the image to a file (in binary mode!) and then try to open it with
> >> an image viewer. The data may be corrupted.
> >
> > When i tried doing that it says Invalid Image...
>
> So it looks like the problem occurs somewhere before you are decoding the
> image with the PIL...
This is what i am doing :
for associate in self.conn.response[:-1]:
attributes = associate['attributes']
obj = {
'img':attributes['thumbnailPhoto'],}
This img i am calling in my view and writing to the file...
--
https://mail.python.org/mailman/listinfo/python-list
