D7100 'streaking'

Started Apr 7, 2013 | Discussions thread
Shop cameras & lenses ▾
Veteran MemberPosts: 6,932Gear list
Streaking is one of several image-dependent sensor artifact mechanisms
In reply to Horshack, Apr 12, 2013

Unfortunately, it is rather ill-understood or part of the most closely held technological know how of the sensor manufacturers, as it is one of the key differentiating features of their products.  I was able to find a few general articles on the subject, but the pictures in this otherwise useless blog article from a machine-vision camera manufacturer are very interesting as they look a lot like what we're seeing:


Column noise, line noise (streaking), and black level shift stem from imperfections in the dynamic bias and cell reset circuitry, it seems.

This article from the 2009 Intl. Image Sensor Society Conference discuss other such dynamic pattern noise mechanisms. In particular, what the authors call "smearing" can be traced to a cell biasing voltage that is slow to settle:


The next article is pretty fabrication technology geeky, but shows just what incredibly complex dynamic adjustments are going on at the pixel level to yield the ultra low noise levels we are enjoying.


imagesensors.org, the website of the IISS, has a wealth of papers on low level electrical and fabrication design and measurement.  It rather boggles my mind what imaging engineers are doing these days.

However, what this suggests to me is that the effect we're seeing is happening at the lowest levels of the sensor circuitry...and because its geometry dependent, it is not amenable to postprocessing tricks.

 mosswings's gear list:mosswings's gear list
Olympus XZ-1 Olympus Stylus 1 Nikon D90 Nikon D7100 Nikon AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR +5 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow