[magick-users] convert runs (almost) forever

[Gabe Schaffer]

On 9/29/06, Larry Beck <larry at beckforce.com> wrote:

> I don't understand why it needs a 2.4GB file. The uncompressed data is only
> 495MB:  40346(r) x 6144(c) x 2(bytes) = 495,771,648

The uncompressed data in IM has 4 channels per pixel (RGBA) whether
the source has it or not. This means that it's 40346*6144*2*4 = 2GB
used up for the source image. You just have to tell IM to use all that
memory, although it probably can't use more than about 1.5GB on a
32-bit machine.

I would recommend using a Q8 build because it will use half the RAM
and CPU, although it may deliver suboptimal results for -normalize
depending on the histogram of the source image.

GNS