Legacy ImageMagick Discussions Archive

Try and see if tells you anything useful like the presence of offsets. If there *are* offsets you can get rid of them with the +repage option (or with the +page option with older versions).

Looking at the page source, that "dot" is actually the "& bull" entity, which may look like a vertical bar on some renderers (or may have looked like a vertical bar once upon a time). The whole site should be checked for use of this entity and it should be replaced with somet...

Try
You might need to use convert instead of mogrify
Glenn

Firefox says your sample image is a 1x1 GIF, not a useful JPG.

To answer your question, quantize to 256 colors or less and write
to a format that supports indexed colors.

convert file.png file.txt
[manipulate file.txt]
convert file.txt new_file.png

Open a target image the same dimensions as your source. Scan the source looking for "5". Wherever you find one, draw one in the target image. Repeat with "0". By "looking for 5" I mean look for a rectangle in which every black pixel of a small image of the "5"...

After you upgrade libpng to an incompatible version (1.0.x -> 1.2.x) you have to recompile ImageMagick. Incidentally, libpng-1.2.2 is also pretty old. The current version is 1.2.10.

Try using the "+matte" option.

Look in the delegates directory at ftp.imagemagick.org/pub/ImageMagick

JPEG lossless patch (apply to IJG JPEG library sources)

ljpeg-6b.tar.gz

Why do you want to write lossless JPEG files? Almost no one can read them.

Just to clarify, in your example it gives an output of: 464x479 640x480+88+1. Does this mean that pixel has been trimmed from the top/bottom, 88 from the left and 88 from the right? If this is so, any idea why my images give +0+0 as the output? It means the resulting image is 464x479, the original ...

Read the documentation about "geometry". It's either
"100x<" or "100x>". One means "only if larger" and the
other means "only if smaller".

Glenn R-P

$ convert -trim logo: -verbose logo-trimmed.png
logo:=>logo-trimmed.png LOGO 640x480=>464x479 640x480+88+1

Besides using -sample or -colors, you could write PNG with -quality 90
and probably get somewhat smaller files. ../glenn

q6z4k_ wrote: I found out that it can be done with composite tool, but how do I make the second image 50% transparent??

-dissolve 50

Hi, Just ran identify on all the three images and this is the output. Any ideas? When output is jpg, it is defnitely not black and white image even if the source is. Looks like convert to png is fine. What could be causing this? Your results are OK. It's just that JPEG doesn't support pure black/wh...