Legacy ImageMagick Discussions Archive

I know nothing about delegates, but dcraw 8.86 has option -c to write to stdout, so can you > that to %o?

Can you post a link to the xcf file so we can try it?

Thanks, magick.

There is also the question of why

convert mask.tif mask.jpg
convert mask.tif -resize 100x100 mask.jpg


do two different things with alpha.

How does this know that we want black as transparent?

I'm guessing, but see command-line-options, for -transparent-color:

"The default transparent color is #00000000, which is fully transparent black."

Ah, yes, of course. "\" is bash, not PHP. And I'm not sure if you need to escape the brackets. Splitting the lines in PHP would be something like: shell_exec( <<<theEnd /usr/bin/composite -gravity center /full/path/to/overlay.png /full/path/to/image.png miff:- | /usr/bin/convert - -resize ...

If I understand you correctly:

1. Executing "$ convert" runs /usr/bin/convert.

2. "which convert" shows /usr/local/bin/convert.

If that's true, something is badly wrong (with your Unix, not Imagemagick).

I would do the obvious things, like ensuring that some IM command works, then splitting this one into two so it doesn't use pipes, and so on.

You'll have to do trials, trading off download size, visual appearance and programming complexity.

In my experience, most scanned pages compress best in jpg, even the most graphic kinds. (But your scans may be different.)

Editable only as pixels. ImageMagick is a raster processor -- it deals with pixels.

"Flatten" is what does the work. The "-background" just declares the colour that will be used by any operation that needs a background.

"miff:" is a file format, not a command. The "-" means send it to stdout. You need a corresponding "-" in the next convert to read from stdin.

convert - -resize 128x128! \
etc

What version of IM are you using?

When I use
convert test.png test.tif
(version 6.4.5) my result looks like what you want.

"identify verbose" tells me the image has a conventional alpha channel. If you effectively want to place this image in front of a white background, so the white shows through the transparent areas, try: convert newsletter.png -background white -flatten newsWhite.png [Edited: added "-&...

Can you post a link to your image?

Is this for 256-pallette Gif?

The "-transparent-color" option is probably what you need.