Python Wand convert PDF to PNG disable transparent (alpha_channel)

Question

I\'m trying to convert a PDF to PNG - this all works fine, however, the output image is still transparent even when I believe I have disabled it:

with Image(         


        

Answer 1

The other answer (compositing with a white image) works, but only on the last page, as does setting the alpha channel directly. The following works on wand 0.4.2:

im = wand_image(filename='/tmp/foo.pdf', resolution=200)
for i, page in enumerate(im.sequence):
    with wand_image(page) as page_image:
        page_image.alpha_channel = False
        page_image.save(filename='/tmp/foo.pdf.images/page-%s.png' % i)

I think this is probably a bug in wand. It seems like setting the alpha channel for a PDF should affect all pages, but it doesn't.