Helpful, but I'm a little late seeing this, as I just posted about spam.
I've made some progress on this too.
Lucas wrote:
Hello,
I think what you have to do instead of img.info is to call img.mode,
this will give you the type of image (RGB, ARGB, P (indexed), etc).
In a 'P' mode image you can make the following:
myimg = im.palette
data = ""
data is a tuple with the following structure:
(mode, str)
mode: is the color mode, eg: RGB, ARGB...
list: is a string that contains the values of the palette colors, once
following each other, and you have to parse it by your own depending
on the mode.
eg:
print data
('RGB', "\x80\x00\x00\x00\x00\x00\x00\x80\x00.....")
The you can decode this with the following code:
decoded = [ord(component) for component in data[1]]
print decoded
[128, 0, 0, 0, 0, 0, 0, 128, 0,...]
because of the mode is RGB the colors of our palette are:
R G B
128, 0, 0
0, 0, 0
0, 128, 0
......
I hope i was clear enough.
Lucas.
On Sat, Apr 4, 2009 at 9:43 AM, Wayne Watson
<sierra_mtnv...@sbcglobal.net> wrote:
Suppose img is a PIL image. img.palette is then an instance, say, myimg. How
do I display what is in it? mimg.hello_in_there()?
Is the depth contained in the palette? PIL-handbook-2.pdf (1.1.3) has no
PaletteImage description, which is where I would expect to find out about
palette methods. Where other than looking in the PIL would I find a
description? Maybe this is basic Python OOP as a means to find out? Doc?
When I use img.info on various images I see in a program I'm using, I see
this:
# wagon.gif: {'compression': 'raw', 'dpi': (1, 1)}
# sentintel image: {}
# moon_surface.tif: {'compression': 'raw', 'dpi': (1, 1)}
# v....bmp : {'compression': 0}
sentinel image is an image created by the hardware that interfaces with the
software, and is 640x480 by 8-bits. v....bmp is one of the output files from
the h/w that I've saved as bmp. Is there a description somewhere of what
the dictionary output contains? I guess it's sort of obvious, but do other
formats have more?
--
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
(121.01 Deg. W, 39.26 Deg. N) GMT-8 hr std. time)
The Obama Administration plans to double the production
in solar energy from 1% to 2% of the total energy
supply in the next few years. One nuclear reaction
would do the same. Heard on Bill Wattenburg, KGO-AM
"Less than all cannot satisfy Man." -- William Blake
_______________________________________________
Image-SIG maillist - Image-SIG@python.org
http://mail.python.org/mailman/listinfo/image-sig
--
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
(121.01 Deg. W, 39.26 Deg. N) GMT-8 hr std. time)
"In arithemtic as in politics, the importance of one is
determined by the number of zeros behind it." -- Anon
|
