Python Image Library

[S. D. Rose]

Sorry-- meant to post to comp.python.image

"S. D. Rose" <s_david_rose at hotmail.com> wrote in message
news:dnv3ke$fln$1 at sea.gmane.org...
> I have a question about PIL.
>
> I get a 50k photo from a MySQL table, convert it to grey-scale, do some
> rotations, etc.  Then I want to put it back.  It seems that after I do the
> greyscale, it converts from 'JPEG' to 'RAW'.  Can anyone tell me how I
> convert the image back to 'JPEG' and then insert the photo into the MySQL
> database? I've tried .tostring('jpeg') but that told me it couldn't load
the
> jpeg encoder.
>
> My steps are here:
>
> >>> import MySQLdb
> >>> import array, cStringIO
> >>> import Image, ImageOps
>
> >>> con = MySQLdb(db='', host='', user='', passwd='')
> >>> cur = con.cursor()
> >>> cur.execute('SELECT photo FROM photos')
> >>> result = cur.fetchone()
> >>> photo = result[0].tostring()
>
> >>> colorImg = Image.open(cStringIO.StringIO( photo))
> >>> colorImg.show()   # Shows a color image on the Win32 screen
>
> >>> img.format
> 'JPEG'
>
> >>> bwImg =imageOps.grayscale(img)
> >>> bwImg.format
>
> >>> todb = bwImg.tostring(encoder_name='JPEG')
> TRACEBACK ...
> IOError: encoder JPEG not available.
> >>>
>
> Any help telling me how to take the bwImg image (not the PIL object) and
> placing it back into a MySQL database would be highly appreciated!
>
> Thanks!
> Dave
>
>
>
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