Hello,
I wish to plot 4 different raster images within a figure, and later
plot registered lines highlighting certain features of them.
Here is the code to read one image and plot it, works as expcted:
img = Image.open(sys.argv[1])
img1 = numpy.asarray(img)
pylab.figure()
pylab.imshow(img1)
pylab.savefig('_imgok.jpg')
Now, make a double-sized image array, and tile the original image into it:
pylab.figure()
YRES = img1.shape[0]
XRES = img1.shape[1]
twoimg = numpy.zeros((2*YRES,2*XRES,3))
#twoimg = numpy.empty((2*YRES,2*XRES,3),numpy.uint32)
twoimg[0:YRES,0:XRES,:] = img1
twoimg[0:YRES,XRES:2*XRES,:] = img1
twoimg[YRES:2*YRES,0:XRES,:] = img1
pylab.imshow(twoimg, origin='upper', interpolation='nearest')
pylab.gray()
pylab.savefig('_imgproblem.jpg')
It comes out strangely colored, vaguely as if the red and green channels were
swapped. However, that's not it (I tried swapping).
This is with maaplib-0.91 (-2?) on a mac 10.4.11, and I think
the backend is GTKAgg
Thanks for any advice
(recent convert from matlab, quite happy...)
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