Tag: digital

Digital photography with flash and no-flash image pairs

Nicolai Grossman 2 Comments

Digital photography has made it possible to quickly and easily take a pair of images of low-light environments: one with flash to capture detail and one without flash to capture ambient illumination. We present a variety of applications that analyze and combine the strengths of such flash/no-flash image pairs. Our applications include denoising and detail transfer (to merge the ambient qualities of the no-flash image with the high-frequency flash detail), white-balancing (to change the color tone of the ambient image), continuous flash (to interactively adjust flash intensity), and red-eye removal (to repair artifacts in the flash image). We demonstrate how these applications can synthesize new images that are of higher quality than either of the originals.

See sample images at Microsoft Research

Minolta 35mm to digital conversion how-to

Nicolai Grossman Leave a comment

I started out with a Minolta from 94′ or so that had a busted something or other. I also had a QuickCam express usb camera that would give us our ccd. After dissembling the quickcam with one screw and cutting the shutter from the Minolta we had done most of the work. Also we lost our IR filter when we ditched the old quickcam lens, so for now we get that sweet halo effect for free.

Read tutorial at how2.0

Via MAKE Blog

Hasselblad announce 503CWD DSLR

Nicolai Grossman 2 Comments

Hasselblad will launch a new 12 megapixel 503CWD DSLR, which is essentially a 503CW with a the CFV digital back, which replaces the V96C. Wanky limited edition of 500 pieces.

Consider the following facts:

  • The list price of for the back alone is US $9,995.
  • You can buy a CanoScan LiDE 60 for about $80.
  • Add in $60 in other materials.

This means that you can make 71.3929 scanner cams for the price of the back. I’ll admit that I own and operate two Hasselblad film cameras, but does a Hassy back produce results 71.3929 better than a hacked-up scanner back? Completely different tools for completely different jobs, of course—and I wouldn’t kick one out of bed if it landed in my lap (or would I, and buy an SWC with the proceeds? yeah, probably…)—but still fun to think about.

GREYCSTORATION: insane, open source image scaling, denoising, and inpainting

Nicolai Grossman Leave a comment

GREYCSTORATION inpainting sample
(Before & after: inpainting (type removed))

"GREYCSTORATION is an image regularization algorithm which processes an image by locally removing small variations of pixel intensities while preserving significant global image features, such as sharp edges and corners. The most direct application of image regularization is denoising. By extension, it can also be used to inpaint or resize images."

The results of the resizing tool look a lot like Polaroid Time-Zero emulsion manipulations.

Check it out at www.greyc.ensicaen.fr/~dtschump/greycstoration, it’s quite impressive (and free!).