Brilliant. I'll look into that. By the way, you guys are amazing. This is so helpful in getting started. I feel my Java skills gladfully drifting off into the murky past...
2009/8/20 Christopher Wright <[email protected]> > I've been using QC as a test bed for sequences of CI filters and math >> operations for image analysis. >> Basically, I put the image in, pass it through various filters and bits 'n >> bobs, and some info comes out the other end. >> Ideally, I'd like to somehow invoke this QC composition from my Cocoa >> code. Much like a function or method. I don't want to display the >> composition output anywhere. It's just for analysis. >> If I could do that, it would be great. I could tweak things easily in QC, >> then hop back to XCode. >> I see that you can use compositions in IB and have them displayed in >> QCView. That's not what I want to do though. >> Does anyone have any experience with this? Is it a worthwhile approach? >> > > It can be a worthwhile approach, and it allows for some things that a > normal CI filter chain can't do. > > To do this, look into QCRenderer, rather than QCView -- QCRenderer is the > offline version (it isn't tied to the display) -- you can feed it a custom > GL context (ala NSOpenGLContext), or have it manage its own offscreen > context. You can then render to the context, and read it back (QCRenderer > snapshotImageOftype: is the method of choice, I think). > > Anyway, there's also Image Filter compositions -- this is a special > protocol where a composition doesn't render anything, and you use published > outputs to get the resultant image. This is closer conceptually to what you > were asking, but a bit different in terms of how it's implemented. > > -- > [ christopher wright ] > [email protected] > http://kineme.net/ > >
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