I know that HDR creates a long tonal range, however, I have heard of HDR used fo

Question: I know that HDR creates a long tonal range, however, I have heard of HDR used for huge DOF!. How does that work!?
Best Answer - Chosen by Asker:

There might be some confusion between using multiple exposures for HDR and using multiple exposures to synthesize a 'huge' DOF!. Wtih HDR the multiple exposures involve recording different light levels having image detail!. Your doing different photon captures and you don't want anything else to change or it goes wrong!. Sythesizing DOF you want to keep the light exposure the same, but change the DOF!.

Basically, you take several shallow DOF images of the same subject with each image having a different plane of focus!. Four, five, or a few more!. These are then registered to each other very exactly!. You then pop the images into software that synthesizes a single image with a DOF that goes from front to back of the set of images!.

I think the technique was fist developed for photographic microscopy!. If you have Photoshop CS3 and Matlab, you can download software to this kind of thing and there are commercial packages out there!. I don't know of a good way to do it by hand, which can be done for HDR images!.

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