Legacy ImageMagick Discussions Archive

Hi there

I use ImageMagick to compare the image content of some CR2 (Canon RAW) files. This is VERY slow. E.g. on a MacBook (2.5 GHz Core 2 Duo with SSD) it takes around 2 minutes! Some fiddeling revealed:

• The conversion is the slow part. For example

  Code: Select all

  convert CR2:IMG_1234.CR2 IMG_1234.tiff 

  takes a minute to convert a 16MegaPixel file.
• This conversion employs the ufraw tool.

My questions now are:

• Is there a way to speed things up in ufraw? E.g. can I give more memory to ufraw or so?
• Can I employ another RAW converter in ImageMagick? Does anybody have experience using in ImageMagick the normal Mac Os X converter (I think it's part of Quartz)? This should be much faster.

My ImagickMagick is version 6.7.2 installed via MacPorts

Many thanks for any pointer, Walter
---
Walter Dallaway
* Landscape and Architecture Photography
* Creativ Exposure with Tripod and HDR

If

convert -version

shows OpenMP, the recompile IM without OpenMP and see if that helps. Some multi-processor systems have trouble with OpenMP and actually run slower.

Thanks for your suggestion, Fred
does indeed list the feature OpenMP. (This is actually the only listed feature.)

Not sure how to compile IM through MacPorts though. Don't you think is the culprit?

Thanks, Walter