> From: Douglas Bagnall <[EMAIL PROTECTED]>
> Subject: Re: [Image-SIG] Font colour
[...]
> But I think the
> clearest way, based on watching subtitled movies, is to have the text
> in a constant colour, with an outline, or shadow, or glow. So I would
> try instead:
>
> blur = mask.filter(ImageFilter.BLUR)
> im.paste((0,0,0), (0,0), blur)
> im.paste((255,255,255), (0,0), mask)
>
> for white writing with a black halo. Maybe black on white is better.
That's an interesting way to accomplish this - I'm not familiar with the
filtering approach, so I did something similar the hard way:
displayOffsets=[(-2,-2,(0,0,0)),
( 2,-2,(0,0,0)),
(-2, 2,(0,0,0)),
( 2, 2,(0,0,0)),
(-3, 0,(0,0,0)),
( 3, 0,(0,0,0)),
( 0,-3,(0,0,0)),
( 0, 3,(0,0,0)),
( 0, 0,(255,255,0))]
for dispOff in displayOffsets:
dx,dy,c=dispOff
lSurf=lineFont.render(line, 1, c)
pageSurf.blit(lSurf,(margin+dx,cursorPos+dy))
I was drawing text over a photographic image for use on a projection
screen - this approach gives a few jaggy bits that you can see close up, but
weren't a problem in pratice for me. As you can see there, I hard coded it
to yellow text on a black background, which was pretty readable on most
images.
I was fortunate that I had a little bit of choice in the images that I was
drawing, so I could select photographic backgrounds that complemented the
text, rather than adapting the text to fit the photos.
-Dave LeCompte
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