Legacy ImageMagick Discussions Archive

Thanks for the reply.
That link looks promising, I'll have a go at converting first.

WB

Hi, I'm aiming to overlay several images on top of a base image. My script would be something along the lines of composite -gravity southwest nameimg.gif base.gif nameoverbase.png However, I'd like an offset from the gravity SW. From the examples I've seen specifying geometry the offset is defined ...

Hmpfh, I still can't get your workarounds (png:32 or -define png:color-type=6 ) to work. Still black instead of varying transparency (with IM 6.6.1-0) For the record, the other computer I have with IM 6.5.4-8 works fine without any workarounds - perhaps I'll have to use that until a new release ...

Hmm, I'm on 6.6.1-0 here. However, this is the latest version I can (it seems easily) get for Opensuse 11.3.

The other computer I have which the transparency composite works okay on is IM 6.5 something.

What does png32: do anyway - would that be version dependent?

tbc/night

BUG - oh my, that makes me feel just slightly less stupid than when I normally post here.

"Identify" - very useful.

However, the png32: which works for you but does not for me. Still getting black instead of transparent Hmmm... Is it an IM version thing?

Composite worked for me previously and produces the sort of results as per my 3rd link. In answer to your qus Anthony. Yes, the snow is opaque patches on a transparent background, not necessarily, and I think almost always where the rain is. Rain is varying levels of transparent-opaque blue on a ...

Just to clarify further, the final result should look something like
http://www.weatherbadger.com/Charts/tes ... ecip39.png
where the snow (white to grey) is opaque and the rain (blue) is varying transparency. all on a transparent background...

Cheers
WB

Sorry, I realise I wasn't clear, I want the background as transparent. ie the transp_rain4.png with the snow image on top.

-background doesn't have a transparent option¸so how can I ensure this transparency is copied across?

Hi Been a while. Upgraded laptop with Opensuse 11.3 and ImageMagick 6.6.1-0 2010-07-29 and can't now make a good composite of two images: http://www.weatherbadger.com/Charts/test/transp_rain4.png is the varying transparent base. http://www.weatherbadger.com/Charts/test/USAsnow4.png has a transparent ...

+Clone - I've never have come up with that.

Just tried it and it works. Brilliant.

Many thanks
WB

Hi I'm trying to cut out a transparent mask-hole in my wave charts so an underlying land-map will show through in a web-browser. I'm starting with http://www.weatherbadger.com/Charts/test/wave2.png and have a landmask http://www.weatherbadger.com/Charts/test/wave_transp.png - if you open this with ...

I'm using OpenSuse 11.1 with Imagemagick 6.4.3 so that explains why your alpha extract didn't work. Interestingly(ish) There isn't a newer version available of IM via normal upgrade of OpenSuse 11.1 OpenSuse 11.2 comes with 6.5.4-8 I think. I'm aiming to upgrade to OpenSuse 11.2 when I get the time ...

snibgo/fmw42 Result! By making my originals with a white background I've got what I want (for now). Thanks! I have been using GIMP for a while to check how the opacity looks. I now need to play more with the shading of the plots and work on getting white snow. fmw42 - your last bit of code I couldn ...

Wow, in the time it took me to trial a new script and crash my computer (nothing to do with IM), reboot and have a cup of tea... I think we're nearly there. Here is a smaller version of where I'm starting from: http://www.weatherbadger.com/Charts/test/accumulatedprecip9.png With the first sets of ...

Hello I am trying to convert my images (which have transparent background) varying the level of transparency of each pixel according to its rgb colour intensity. So lighter colors (with higher rgb values) will become more transparent and darker colors (lower rgb) will remain almost opaque. So far my ...