Depth of field experiment
Tilt-shift photography
Tilt-shifting is a photographic technique involving the physical rotation (tilt) and translation (shift) of a lens with respect to the imaging plane. The result is a picture with warped perspective or selective focus. A particularly cool use of lens tilting lets us simulate a miniature scene from a photograph of real-world scenery.
Faking it
Lacking a tilt-capable lens, we can use digital post-processing techniques to emulate this effect. I found an article that gave an example on how to do this with a blurring function:
- Blur the original (in-focus) image
- Identify image regions that are in or out of focus (in the article, the GPU Z-buffer is used)
- For each pixel in the output, linearly interpolate between a focused and blurred pixel
blah blah blah MATLAB code
newline tests Dear Qifan: finish this The result
Original image
Fully blurred version
Selectively blended
