Ok, so I have a given video source (for the sake of the example, it is a camera). It does not have optical zoom, but we supply digital zoom instead. Now this digital zoom is pretty simple, simply cropping the image to a specified portion, and filling the screen with that portion.
The problem is that the zoomed video can have pretty rubbish quality when the digital zoom is enabled.
I am wondering if anyone knows of an approach by which a higher quality of digital zoom can be achieved in real-time.
The software is on Windows, and the video is rendered using DirectShow, but it isn’t a platform solution I’m necessarily after, more just a better approach to the problem.
Cheers
I discovered two posts by Jeff Atwood on this topic. If you want better than bilinear resizing, fractal resizing seems to be a good alternative.
The link Jeff gives to the CodeProject example is dead, but I think he’s referring to this article.