> On Fri, Dec 11, 2009 at 08:51:21PM -0500, erik quanstrom wrote:
> > 1. for some reason the hw.gif (interstates) are
> > in cyan not red. drawing the radar first and the
> > hw second yields inverse radar colors.
> In what order are you layering the images? According to [1] they are layered
> left to right as on the toggle bar.
>
> [1]http://www.srh.noaa.gov/jetstream/doppler/ridge_download.htm
i think that's beside the point here. the colors get inverted regardless
of the order of composition. try compose -t topo.jpg radar.gif hw.gif.
(this is the same order as on the site). in this case the radar image has
the wrong colors.
it looks like an α² problem, but i don't think it is. if you use an r8g8b8
base image, the color effects still happen. m8a8 yields black. i didn't
know that was legal, yet:
; gif -9 radar.gif|dd -count 1 -bs 50>[2=]; echo
m8a8 0 0 600 ;
it's especially odd to try these two:
; compose -c m8 -t topo.jpg radar.gif hw.gif
; compose -c m8 -t topo.jpg hw.gif radar.gif
- erik
