[Image-SIG] How to convert an Image in RGB to JPG

[Frédéric Mantegazza]

On mardi 26 février 2008, Shabda Raaj wrote:

> This is the code I am trying and errors I get,
>
> >>> image = Image.new(mode='RGB', size = (10, 10))
> >>> image.convert('JPG')
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\Lib\site-packages\PIL\Image.py", line 612, in
> convert im = im.convert(mode, dither)
> ValueError: conversion from RGB to JPG not supported
>
> >>> image.convert('jpg')
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\Lib\site-packages\PIL\Image.py", line 612, in
> convert im = im.convert(mode, dither)
> ValueError: conversion from RGB to jpg not supported
>
>
> Basically I want to create an image, do some drawing on it and get the
> image as  byte array. I am obviously missing some basic step, but I
> can't figure out what :(

'JPG" is not a valid mode ('RGB', 'RGBA', 'CMYK'... are). To get the image 
as something near array, use image.getdata() method.

To save it as jpeg, just use image.save("myfile.jpg").

-- 
   Frédéric

   http://www.gbiloba.org