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Most efficient way to get the pixel dimensions of a JPG

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Most efficient way to get the pixel dimensions of a JPG

Subject: Most efficient way to get the pixel dimensions of a JPG
From: John Fox <email@hidden>
Date: Thu, 6 Jan 2005 18:46:19 -0500

Hello:

I'm looking for a really fast and memory efficient way to determine the pixel height and width of a JPEG image. Can someone help me with this? Right now I'm creating an NSBitmapImageRep and getting its pixelsWide and pixelsHigh, but there's a lot of overhead for doing this.

Any help greatly appreciated.

John

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