> I am writing an application that wants to perform some basic computer vision
> computation, and I want a class that offers pixel-level access to an image.
> What would be the best way to approach this?
>
Do something like:
MyImageRep =
[[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL
pixelsWide:pixelsWide
pixelsHigh:pixelsHigh
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSDeviceRGBColorSpace
bitmapFormat:NSAlphaFirstBitmapFormat
bytesPerRow:pixelsWide * 4
bitsPerPixel:32];
And later:
[NSGraphicsContext setCurrentContext:[NSGraphicsContext
graphicsContextWithBitmapImageRep:myImageRep]];
and:
[myImageRep representationUsingType:NSJPEGFileType properties:imageProps];
This should get you started.
Trygve
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