Member Avatar for tehbrozor

Hello!
I am trying to display a FITS image, if your not familiar with the extension its fine (gtk.Image.new_from_file() isn't either). I can get my image data to a numpy array (2D (256x256 to be exact)) I am having the most difficult time getting this into a grayscale image. I've tried gtk.Image() Ive tried pixbufs and pixmaps everything on the web. I'm having trouble making the color scales/maps. Something about visuals? My computer didn't have any that would work (debian linux). I've been slamming my head against the wall for days over this one and It seems like it should be so simple. Thanks for your help/suggestions!!!


Here is the eventual implementation:

#!/usr/bin/python
#filename: imgTest.py


import gtk
import pyfits as pf
import numpy as np

class PyApp(gtk.Window):

   def __init__(self):
      super(PyApp, self).__init__()
      self.set_title("image test")
      self.set_position(gtk.WIN_POS_CENTER)
      self.connect("destroy", gtk.main_quit)
#--------------------------------------------------------------------------------
      data = abs(np.matrix(pf.getdata('img.fits')))
      data = data*(255.0/data.max())
      [w,h] = np.shape(data)
      #I need to take the array 'data' and display it as an image 
	

#--------------------------------------------------------------------------------
      self.show_all()

PyApp()
gtk.main()
  • 1 Contributor
  • 1 Reply
  • 242 Views
  • 5 Days Discussion Span
  • Latest Post Latest Post by tehbrozor
Member Avatar for tehbrozor

So pylab has colormaps, but they dont work as gtk.gdk.Colormap() is there any way to convert maybe?

#--------------------------------------------------------------------------------
      data = abs(np.matrix(pf.getdata('img.fits')))
      data = data*(255.0/data.max())
      [w,h] = np.shape(data)
      cmap = pylab.get_cmap('gray')
      window = gtk.Window()
      pm = gtk.gdk.Pixmap(None,256,256,8)
      pm.set_colormap(cmap)
      gc = pm.new_gc()
      pm.draw_gray_image(gc,0,0,256,256,gtk.gdk.RGB_DITHER_NONE,data)
#--------------------------------------------------------------------------------

The error message:

kevin@rainier sandbox% python imgTest.py
The gdk_draw_*_image require the drawable argument to
have a specified colormap. All windows have a colormap,
however, pixmaps only have colormap by default if they
were created with a non-NULL window argument. Otherwise
a colormap must be set on them with gdk_drawable_set_colormap
kevin@rainier sandbox% python imgTest.py
Traceback (most recent call last):
File "imgTest.py", line 36, in <module>
PyApp()
File "imgTest.py", line 25, in __init__
pm.set_colormap(cmap)
TypeError: GdkDrawable.set_colormap() argument 1 must be gtk.gdk.Colormap, not instance

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.