Help with Image Processing?

[Melvin Lasky]

Hey all,

   I'm working on a project that requires some Image Analysis and processing, and was wondering if anyone knows where I can find any tutorials or just point me in the proper direction? Thanks for all your help!

Sincerely,

Mel

[Matt Coneybeare]

In the past I have used Tesseract OCR to make a cheat game that read a screenshot of image tiles. It worked really well even with a small set of training samples. Google will point you to many piece of info on how to build for iOS or Mac.

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[Robert Martin]

I seem to remember some stuff about image processing in the Accelerate documentation - Convolution, Histograms, that kind of thing. I can't remember if there were any links to source code examples, but it might be worth checking out

Rob

On Jun 24, 2012, at 7:35 PM, Melvin Lasky wrote:

[Robert Martin]

I tried Googling, and found this link to an Image Framework that uses vDSP/Accelerate: http://www.iphonedevsdk.com/forum/iphone-sdk-development/82194-library-image-processing-using-vdsp.html

Gobbledygook to me, but might be useful to you!

Rob

[Andy Lee]

As it happens, I tried to evangelize Accelerate a bit during the last meeting. If you're a registered (paid) developer, check out WWDC session 708.

Okay, I haven't actually *used* Accelerate, but after Jeff Biggus's talk at at MacTech last year I was very impressed with it. You can get Jeff's slides from MacTechConf for free here (search for his name under "Speakers in Developer Sessions", or scroll to the bottom to grab *all* the conference slides in one zip):

<http://www.mactech.com/conference/presentations-speaker>

There's plenty of info in the WWDC talk, but to pimp MacTech for a moment: you can buy the video of Jeff's talk ($30, DRM-free) by going to <http://www.mactech.com/conference/videos>. Follow the store link, then select "Developer Track" from the popup at the top. (Feedback to Ed: I get confused by that UI every time, and wonder why videos are missing from the list.)

--Andy

On Jun 25, 2012, at 7:50 AM, Robert Martin wrote:

[Hank Heijink]

I have used accelerate, and it can give you a significant performance advantage in certain cases. I haven't measured this myself, but apparently the array copy functions in accelerate are faster than memcpy(), which is quite impressive.

Hank