What's the fastest way to rotate an image?

[mkdieric]

I need to perform a rotation on an array representing an image. The angles are random between 0 and 90 degrees. The fastest way I found is with IMAQ. But that means converting the arrays to an IMAQ image first, then rotating and then again converting back to array. There must be a faster way, because probably IMAQ itself converts the image back to an array to perform the rotation. I implemented the classical algorithm of shear-transpose-shear-transpose, but that's 10 times slower than the IMAQ routine.
A special case for rotating under 45 degrees might also be interesting for me.
Thanks.

[Chad_Pelletier]

Hi Manu,
You have submitted your question to the Industrial Networks>Ethernet forum. Your question really doesn't have anything to do with Ethernet communication. I think you will be better served if you resubmit your inquery to either the Vision Exchange or a forum more closely related to the programming environment which you are using.

-Chad

[mkdieric]

Yeah I know, I pressed the wrong button and didn't find a way to delete the post. But thanks anyway 😉
Manu.