Archived posting to the Leica Users Group, 2008/05/03

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Subject: [Leica] HDR
From: sam.kennard at mac.com (Sam Kennard)
Date: Sat May 3 04:41:10 2008

I think Kyle started a thread recently about HDR.

Maybe Panasonic was listening.

http://www.news.com/8301-13580_3-9864843-39.html

http://tinyurl.com/32sh23

>From the article...

"With today's sensors, "You can get either highlight or shadow detail,
depending on the exposure time. To get much wider dynamic range images, we
need to combine these different-exposure images," Yamada said.

Yamada showed a 177x144 pixel image sensor that takes three photos of the
same scene in rapid succession. In one example, he said, the first exposure
lasts 1.5 microseconds, the second 150 microseconds, and the third 15,000
microseconds (not far from a 1/60 second exposure). Extra circuitry built
into the sensor records the data from the multiple exposures and uses an
assortment of electronic capacitors to combine it into a single image that
spans a greater dynamic range.

The image can span a dynamic range of 140 decibels compared with ordinary
sensors with a 60dB range when working at a frame rate of 15 frames per
second, the researchers said."

Sam Kennard



Replies: Reply from red735i at earthlink.net (Frank Filippone) ([Leica] HDR)
In reply to: Message from nathan at nathanfoto.com (Nathan Wajsman) ([Leica] test)