Comments on: Custom Camera applications development using iPhone SDK

By: admin

admin — Thu, 17 Sep 2009 09:13:21 +0000

1. Yes, since you have CGImageRef instance, you can get any image-related information using set of CGImage* functions (like CGImageGetBitsPerPixel). If you need raw pixel data, you can use CGImageGetDataProvider and CGDataProviderCopyData. There are a few useful links:

http://developer.apple.com/mac/library/qa/qa2007/qa1509.html
http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone
http://stackoverflow.com/questions/448125/how-to-get-pixel-data-from-a-uiimage-cocoa-touch-or-cgimage-core-graphics

2. I think you cannot modify that frozen image directly – you should use a view (UIImageView) that contains required filter (image) and overlays that frozen image. Simply add the view as a subview above the frozen image view.

Please notice that SDK 3.x provides completely different UIImagePicker views and the article and sample code need to be rewritten.

By: Alessandro

Alessandro — Wed, 16 Sep 2009 15:49:47 +0000

another question: can I also superpose an image on the forzen image? can i for instance use a filter that print a glass and mustache mask on the screen and then, behind have the taken picture?

thanks again,
Alex

By: Alessandro

Alessandro — Wed, 16 Sep 2009 15:47:53 +0000

Great article, really!
thanks for your help.
can I also in some way get information out of this sfrozen picture as for instance the color of a pixel?

By: jakarta08

jakarta08 — Mon, 08 Dec 2008 23:06:13 +0000

Great article! Helped a lot to understand the architecture.
Are you aware that this doesn’t work with OS2.2 however.
The hidden imageRef is gone.

Any ideas how to get the reference to the original image?
BTW: iUniqable crashes with 2.2