Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
- I want to have overlapped images (left part of the next picture on the right part of the last picture). So I use "-geometry -100+0". The first usage (pic 2 on pic 1) is fine. But the next overlappings (pic 3 on pic 2 and pic 4 on pic 3) have much more distance!?
- The source PNG files have transparency. But with the montage action the transparency in the montage picture get's lost and it has white background.
The use of negative geometry to overlay images was not designed into montage, it was just an accident that to was found to be useful.
However when you use negatives the canvas size montage generated is too small.
To correct this ad a 'null:' image to the start and end of the montage image sequence. You can trim the resulting image later.
A better way to do this may be to DIY the image placement yourself. See http://www.imagemagick.org/Usage/layers/#example
for a couple of techniques to do this, including a programing placement technique.
