Re: Faster rotate bitmap
- To: mathgroup at smc.vnet.net
- Subject: [mg29168] Re: [mg29115] Faster rotate bitmap
- From: Simon Chandler <simon_chandler at agilent.com>
- Date: Fri, 1 Jun 2001 04:15:29 -0400 (EDT)
- References: <9ektan$7un@smc.vnet.net> <200105300950.FAA08313@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Jens,
In reply to my question about FASTER rotation of bitmap images you posted a routine "RasterRotate".
Am I doing something wrong? As far as I can tell your function is 35x SLOWER than the compiled function "RotateArrayC4" which I included with my original posting. Also, your function seems to be very memory hungry, so for images of the size I said I was using (1280 x 960 pixels) my computer has real problems. Finally, the "holes" that appear in your rotated image are not acceptable to the subsequent processing I need to perform on the rotated image.
So I repeat my questions to the MathGroup:
Q2: Do you think that my method (see below) can be made 10x faster
by improving the code?
Q3: Will I have to resort to a Mathlinked low-level program to achieve the
10x speed increase I'm looking for?
Regards,
Simon