Thanks. The clouds are actually starting to clear up ... in my head,
that is. :=)
On 7/11/07, Anthony Thyssen <[EMAIL PROTECTED]> wrote:
"Ross Presser" on wrote...
| Some information got lost somewhere in this email thread. Your
| -compose just squares the clouds, it leaves out New Zealand
| completely.
|
It was just an explaination. My previous email had the FULL version...
Presumably that email was lost, so I'll resend it now.
---- Resend ----
convert nzcloudstc9.jpg \( +clone \) -compose multiply -composite \
\( +clone -fill white -colorize 100% \) +swap \
-compose CopyOpacity -composite \
nzdaylp9.png +swap +compose -composite \
cloud_overlayed.png
An alturnative to overlaying a 'masked' white is to use 'screen'
to brighten the image basied on the clouds (same result)
Note that 'screen' does not care about the order of the input images.
convert nzcloudstc9.jpg \
nzdaylp9.png -compose screen -composite cloud_overlay.png
OR with squaring (to darken the overlay)
convert nzcloudstc9.jpg \( +clone \) -compose multiply -composite \
nzdaylp9.png -compose screen -composite cloud_overlay.png
For more compose methods see.. IM examples
http://www.imagemagick.org/Usage/compose/
Specifically look at multiply, copyopacity and screen
If you have the lastest IM, you can also try three image 'masked' overlays.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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"I am NOT a merry man!" -- Worf, Startrek NG "Strike Zone"
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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