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Re: Most efficient way to get the pixel dimensions of a JPG

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Re: Most efficient way to get the pixel dimensions of a JPG

Subject: Re: Most efficient way to get the pixel dimensions of a JPG
From: Ricky Sharp <email@hidden>
Date: Thu, 6 Jan 2005 18:35:00 -0600

On Jan 6, 2005, at 5:46 PM, John Fox wrote:

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.

For a general-purpose method which will also handle other image formats, use QuickTime.

Check out the GraphicsImportGetNaturalBounds API.

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Ricky A. Sharp         mailto:email@hidden
Instant Interactive(tm)   http://www.instantinteractive.com

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  >Most efficient way to get the pixel dimensions of a JPG (From: John Fox <email@hidden>)




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