Formula for pixel pitch

Started May 24, 2008 | Discussions thread
chuxter Forum Pro • Posts: 21,707
Re: Formula for pixel pitch

Graystar wrote:

Sensor width in mm / photosite count across the width.

Or sensor height in mm / photosite count across the height.

Normally they are identical, but not always!

Note that sensor have more photosites than pixels in the images they
produced. For example, the sensor that produces my 3072x2304 images
has 3112 x 2328 photosites.

Not required information, but it might have been educational to explain WHY they make sensors that way...

It's because the Bayer demosaicing algorithms used need "extra" photosites to get started, thus there is a border around the "effective" photosites. These "extra" photosites can sometimes be processed by computer and recovered. Thomas Knoll has a free utility that accepts DNG files and recovers some of the extra photosites in the border. Its called "DNG Recover Edges" and is available from Adobe. Here is a good article on the subject, w/ a link to the utility.

-- hide signature --

Charlie Davis
Nikon 5700, Sony R1, Nikon D300
Bridge Blog:
'Experience: Discovering that a claw hammer will bend nails.
Epiphany: Discovering that a claw hammer is two tools...'

 chuxter's gear list:chuxter's gear list
Nikon D810 Nikon D500 Tamron SP 90mm F2.8 Di VC USD 1:1 Macro (F004) Sigma 24-105mm F4 DG OS HSM Tamron SP 150-600mm F/5-6.3 Di VC USD +2 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow