From: | "Leonel Nunez" <lnunez(at)enelserver(dot)com> |
---|---|
To: | "Jean-Christophe Roux" <jcxxr(at)yahoo(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Storing images in PostgreSQL databases (again) |
Date: | 2006-10-06 00:51:13 |
Message-ID: | 1187.201.155.188.137.1160095873.squirrel@enelserver.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
> Hi,
> If the database had built-in functions to manipulate images (make a
> thumbnail, add text ont it.., make a montage of two pictures) and I could
> write something like
> select thumbnail(image_field, 100, 100) from images_table
> that would be a good reason to go the db route versus the filesystem
> route. A database does more then storing data, it makes convenient to
> play with them. Once my pictures are stored in the database, how do I make
> thumbnails for instance? Maybe the solution already exists; I am curious
> here. Is there a way to integrate ImageMagick into a PostgreSQL workflow?
> By the way, is it practical to set a bytea column (containing pictures) as
> primary key? That would severely slow down many operations I guess.
> JCR
>
>
With Python and the python imaging library you can do this :
image is a bytea field
curs = conn.cursor ()
curs.execute( "select image from images where name = %s" ,(thename, ))
row = curs.fetchone()
if row:
im = Image.open (StringIO.StringIO(row[0]))
im.thumbnail (160,120 )
imagetmp = StringIO.StringIO()
im.save ( imagetmp , "JPEG")
print ("Content-type: image/jpeg\n\n")
print ( imagetmp.getvalue())
with this you get your image to the browser thumbnailed
without touch the filesystem
that's all
Leonel
From | Date | Subject | |
---|---|---|---|
Next Message | Ron Johnson | 2006-10-06 01:45:50 | Re: Storing images in PostgreSQL databases (again) |
Previous Message | Joshua D. Drake | 2006-10-06 00:42:21 | Re: PostgreSQL Database Transfer between machines(again) |