[yt-users] Colorbar and labels on volume rendered images
Elizabeth Harper-Clark
h-clark at cita.utoronto.ca
Wed Jan 5 10:55:01 PST 2011
Hi Chris,
[h-clark at tpb5 yt-hg]$ hg identify
4db47be8e251 (yt) tip
[h-clark at tpb4 my_scripts]$ tail -1 ~/YT/src/yt-hg/yt/utilities/amr_utils.pyx
include "_amr_utils/freetype_writer.pyx"
I'm confused too!!
Libby
On 5 January 2011 13:28, Chris Malone <chris.m.malone at gmail.com> wrote:
> Hi Libby,
>
> I'm not entirely sure what is going on here. Which changeset are you
> using? I have the most recent, and I indeed see the
> yt.utilities.amr_utils.simple_writing method whose non-existence it is
> complaining about.
>
> To be more precise, is the freetype_writer included in your
> yt/utilities/amr_utils.pyx?
>
> [cmalone at xrb yt-hg]$ tail -1 yt/utilities/amr_utils.pyx
> include "_amr_utils/freetype_writer.pyx"
>
> Chris
>
>
> On Wed, Jan 5, 2011 at 12:22 PM, Elizabeth Harper-Clark <
> h-clark at cita.utoronto.ca> wrote:
>
>> Hi guys,
>>
>> I found the annotate_image option within yt.visualization.image_writer but
>> I am missing something:
>>
>> *Script*:
>>
>> from yt.mods import *
>>
>> from matplotlib import pylab
>> import numpy as na
>> from yt.visualization.image_writer import *
>>
>> output_file = "aaWoC/%s/MovieFrame_%04i"
>>
>> for i in range(0,189):
>> print "Merging", i
>> image1 = pylab.imread("aaWoC/%s/3D3Movie_%04i.png" % (sys.argv[-1],i))
>> image2 = pylab.imread("aaWoC/%s/ColourBar.png" % sys.argv[-1])
>>
>>
>> new_image = na.concatenate([image1, image2], axis=1)
>> bitmap = write_image(new_image,output_file % (sys.argv[-1],i ))
>> annotate_image(bitmap, "Test", 50, 50)
>> write_bitmap(bitmap, output_file % (sys.argv[-1],i))
>>
>>
>> *Error*:
>>
>> [h-clark at tpb5 my_scripts]$ python2.6 MergeImages.py GMCidresbig128a
>> yt INFO 2011-01-05 12:18:10,296 Loading plugins from
>> /home/h-clark/.yt/my_plugins.py
>> /home/h-clark/YT/lib/python2.6/site-packages/matplotlib/__init__.py:833:
>> UserWarning: This call to matplotlib.use() has no effect
>> because the the backend has already been chosen;
>> matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
>> or matplotlib.backends is imported for the first time.
>>
>> if warn: warnings.warn(_use_error_msg)
>> Merging 0
>> yt INFO 2011-01-05 12:18:10,473 Using only channel 1 of
>> supplied image
>> Traceback (most recent call last):
>> File "MergeImages.py", line 15, in <module>
>> annotate_image(bitmap, "Test", 50, 50)
>> File "/home/h-clark/YT/src/yt-hg/yt/visualization/image_writer.py", line
>> 235, in annotate_image
>> au.simple_writing(font_path, 0, dpi, font_size, text, image, xpos,
>> ypos)
>> AttributeError: 'module' object has no attribute 'simple_writing'
>>
>>
>> ????
>>
>> Also is there a way to change font colour? (in vol rend background is
>> black so I want text in white!). will text_args = {'color':'w'} work?
>>
>> Many thanks,
>>
>> Libby
>>
>>
>>
>>
>>
>> On 5 January 2011 12:05, Elizabeth Harper-Clark <h-clark at cita.utoronto.ca
>> > wrote:
>>
>>> Thanks Britton,
>>>
>>> Concatenating is working :-) now to work out labels......
>>>
>>> Thanks,
>>>
>>> Libby
>>>
>>>
>>> On 5 January 2011 11:29, Britton Smith <brittonsmith at gmail.com> wrote:
>>>
>>>> It is possible to attach a colormap to a volume render image. I can't
>>>> quite remember how to do that. If someone else could chime in on that, that
>>>> would be great.
>>>> If you already have the colorbar image you want, you can concatenate two
>>>> image arrays easily and then write out the new image, provided the arrays
>>>> are the same size in one direction. With pylab, you can do something like
>>>> this:
>>>> from matplotlib import pylab
>>>> import numpy as na
>>>> from yt.visualization.image_writer import write_bitmap
>>>> image1 = pylab.imread(file1)
>>>> image2 = pylab.imread(file2)
>>>> new_image = na.concatenate([image1, image2], axis=1)
>>>> write_bitmap(new_image, output_file)
>>>>
>>>> I believe the image_writer now supports adding text as well, so that
>>>> should take care of the labels.
>>>>
>>>> Britton
>>>>
>>>> On Wed, Jan 5, 2011 at 10:46 AM, Elizabeth Harper-Clark <
>>>> h-clark at astro.utoronto.ca> wrote:
>>>>
>>>>> Good morning everyone,
>>>>>
>>>>> I was wondering how to add colorbars and text labels (e.g. with the
>>>>> time) to images produced through volume rendering. I am unsure of how to
>>>>> adapt all the usual techniques I know for projections etc. gievn the
>>>>> different technique for drawing the images. I am using a constant colorbar
>>>>> so if anyone can suggest a post-processing way of adding to created images
>>>>> that would work too!
>>>>>
>>>>> I am using the following to create my volume rendered images:
>>>>> for i, snapshot in enumerate(cam.rotation(2.*na.pi, n_angles)):
>>>>> print " drawing: dump =", numb, "angle =", i,
>>>>> "shot=",shott
>>>>> if cam._mpi_get_rank() == 0:
>>>>> write_bitmap(snapshot, frame_template %
>>>>> (sys.argv[-1],shott))
>>>>> pl.draw()
>>>>> shott = shott+1
>>>>>
>>>>> Many thanks,
>>>>>
>>>>> Libby
>>>>>
>>>>> --
>>>>> Elizabeth Harper-Clark MA MSci
>>>>> PhD Candidate, Canadian Institute for Theoretical Astrophysics, UofT
>>>>> Sciences and Engineering Coordinator, Teaching Assistants' Training
>>>>> Program, UofT
>>>>>
>>>>> www.astro.utoronto.ca/~h-clark<http://www.astro.utoronto.ca/%7Eh-clark>
>>>>> h-clark at cita.utoronto.ca
>>>>> Astronomy office phone: +1-416-978-5759
>>>>>
>>>>> _______________________________________________
>>>>> yt-users mailing list
>>>>> yt-users at lists.spacepope.org
>>>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>>>
>>>>>
>>>>
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>>>>
>>>
>>>
>>> --
>>> Elizabeth Harper-Clark MA MSci
>>> PhD Candidate, Astrophysics, UofT
>>>
>>>
>>> www.astro.utoronto.ca/~h-clark <http://www.astro.utoronto.ca/%7Eh-clark>
>>> h-clark at cita.utoronto.ca
>>> AIM: edphc1
>>> MSN: edphc1 at hotmail.com
>>> Skype: eharperclark
>>> Office phone: 416-978-5759
>>>
>>
>>
>>
>> --
>> Elizabeth Harper-Clark MA MSci
>> PhD Candidate, Astrophysics, UofT
>>
>> www.astro.utoronto.ca/~h-clark <http://www.astro.utoronto.ca/%7Eh-clark>
>> h-clark at cita.utoronto.ca
>> AIM: edphc1
>> MSN: edphc1 at hotmail.com
>> Skype: eharperclark
>> Office phone: 416-978-5759
>>
>> _______________________________________________
>> yt-users mailing list
>> yt-users at lists.spacepope.org
>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>
>>
>
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>
--
Elizabeth Harper-Clark MA MSci
PhD Candidate, Astrophysics, UofT
www.astro.utoronto.ca/~h-clark <http://www.astro.utoronto.ca/%7Eh-clark>
h-clark at cita.utoronto.ca
AIM: edphc1
MSN: edphc1 at hotmail.com
Skype: eharperclark
Office phone: 416-978-5759
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