Legacy ImageMagick Discussions Archive

ImageMagick rasterizes vector images. We have infastructure to retain vector information but its far from complete. In this case, you probably want to use a different program than ImageMagick.

ImageMagick can appear to hang if the image is large. In this case, the pixels are forced to disk and since disk is much slower than memory, the process can take a long time (sometimes hours if its a large image). If you are sure all your images are of reasonable size (e.g. less than 1000 x 1000 pix...

To convert a bunch of TIFF's to JPEG's, try this command:

• mogrify -format jpg *.tif

We'll investigate as soon as you provide a URL to a PDF that illustrates the problem. The PDF files we use for testing produce correct results (trimmed to MediaBox or CropBox).

Add the -limit option as the first option of the command line. Follow it with -debug cache to verity the pixel cache is on disk.

JPEG has a nice feature where you can ask the JPEG library to return a thumbnail of a large JPEG image but TIFF has no such feature unless the thumbnail is included with the large TIFF. To reduce CPU usage you can force the pixel cache to disk but it will slow down processing time considerably (you'...

Are you using a modern version of ImageMagick, 5.5.7 or above? Older versions of ImageMagick did not compress GIF images because of the LZW compression patent.

We have processed images with a width and height of 250000 pixels so ImageMagick should be able to handle your requirements (7000 x 5000). ImageMagick pushes the pixel cache to disk if it cannot acquire memory. Chances are your temporary disk area is too small. Select a partition that has plenty of ...

Notice

• unable to read font `/usr/share/fonts/default/TrueType/arial.ttf'

Take a look at

• /usr/lib/ImageMagick-6.2.5/config/type-ghostscript.xml

and see if the glyphs names actually exist. You can specify a different font

• -font times

or a font file

• -font arial.ttf

The montage output filename is always the last argument on the command line. Put -debug all as the first option on the command line. We noticed your debug output does not show any text annotation which of course is what you want. When we tried your script with the current release of ImageMagick, 6.2...

Chances are the montage program is not finding any fonts. Try adding -debug all to your command line and review the output carefully for problems.

Thanks, however, we need a complete program that we can download, compile, and run. Alternatively, try 6.2.7-2 yourself. We suspect it will work in a threaded environment.

Q8 uses 100% less resources than Q16. Q16 is more precise in its computations. Q8 must scale any 16-bit images to 8-bit.

It is quite simple to upgrade any method to be thread-safe. We must use cache views rather than the default Acquire/GetImagePixels(). The problem is that there are thousands of places within the ImageMagick that need to be tweaked. So for now we'll make methods thread-safe on demand. One solution wo...

It will create 6 because EPS is not a multi-image format.