Legacy ImageMagick Discussions Archive

Yup so this line does everything my 3 originals did

magick source.png \( +clone -background white -alpha remove \) -compose Over -composite final.png

So it looks from this link like what I need to use is the clone operator

http://www.imagemagick.org/Usage/basics/#clone

I have a bunch of png files with transparency which are premultiplied with black. I need them to be composited on white but preserve the alpha channel for converting to webp format. If I don't do that I get a black edge where there are semi transparent pixels. Is there a simple command that can ...

Absolutely fantastic! thank you

Is there a process for that to happen or do they just check this board?

Seems like there is enough data in the header to read the image since other packages can, photoshop (with plugin), xnview, Houdini itself to name 3 It would be nice if imagemagick could too and just print a warning. However I have now found a work around if imagemagick fails but it's slower than ...

These come from a 3d package, Houdini from Sidefx. They are usually spot on with specs. What's odd is these ones come from the compositor not straight from the renderer. And what I don't understand is even if I re-write them or save them to another format it still chokes. You'd think writing as a ...

Hmm ok that one was clearly a bad example seems that there must be more than one issue here. Let's try this one, this one opens fine in xnview just double chacked it. And gives me this error when I try and convert it magick: improper image header `0001.sgi' @ error/sgi.c/ReadSGIImage/535. magick: no ...

oh I see I did copy the wrong file, it should have been 0841.sgi not 0041.sgi, I'm totally losing it

Try this one
http://stage.anatomy.tv/atv2/bug/0841.zip

Sorry for the confusion. At least you have an example of a good one and a bad one, both generated originally in identical fashion.

Python tends to do that when dealing with windows paths unless you force it not to. As I say it's processed in the region of 100 thousand files without complaint but in the case of about a dozen I get the above error. Looks like I can at the very least process them by hand, but I'd like to get to ...

hmm me too, so why does it like being called from inside a python script... unless I copy the wrong example file....will investigate on Monday

Sample image with issue
http://stage.anatomy.tv/atv2/bug/0041.zip

I'm finding a random error where Imagemagick fails to load some sgi's due to what it thinks is a header error This is the error magick: improper image header `I:/Ifa2/Actions/Render/Pushup/Motion1/Layer2\stills\sgi\0841.sgi' @ error/sgi.c/ReadSGIImage/535 magick: no image to apply a property "%w ...