Re: Slow image import
- To: mathgroup at smc.vnet.net
- Subject: [mg113069] Re: Slow image import
- From: Igor Antonio <igorantonio at gmail.com>
- Date: Tue, 12 Oct 2010 04:29:32 -0400 (EDT)
- References: <email@example.com>
On Oct 9, 5:34 am, to <todu... at gmail.com> wrote: > Dear all, > > I was trying to use Mathematica 7.0.1 for batch image processing. I > used the Import command to load 4000x2000 pixel tiff files. Using the > timing command, I noticed it takes about 0.95 second just to load the > image !!!! Using another system, I can do the same in about 0.15 s. = (about > 6-7 x faster). > > Is there any way to speed things up ??? I already tried to first > write the tiff image data as a raw binary file and loading it again. > It still take about 0.7 seconds in that case. > > Thanks in advance, > > Peter Hello Peter, You'll be happy to know that import/export of TIFF has been revamped for version 8, which will be released soon. It is considerably faster and much more memory efficient. I have benchmarked timings 7x to 18x faster (depending on the type of TIFF file being imported). Same applies to JPEG import/export. Thanks, Igor Antonio Software Technology Wolfram Research, Inc.