Characteristic | CCD | CMOS |
---|---|---|
Signal from pixel | Electron packet | Voltage |
Signal from chip | Analog Voltage | Bits (digital) |
Readout noise | low | Lower at equivalent frame rate |
Fill factor | High | Moderate or low |
Photo-Response | Moderate to high | Moderate to high |
Sensitivity | High | Higher |
Dynamic Range | High | Moderate to high |
Uniformity | High | Slightly Lower |
Power consumption | Moderate to high | Low to moderate |
Shuttering | Fast, efficient | Fast, efficient |
Speed | Moderate to High | Higher |
Windowing | Limited | Multiple |
Anti-blooming | High to none | High, always |
Image Artefact | Smearing, charge transfer inefficiency | FPN, Motion (ERS), PLS |
Biasing and Clocking | Multiple, higher voltage | Single, low-voltage |
System Complexity | High | Low |
Sensor Complexity | Low | High |
Relative R&D cost | Lower | Lower or Higher depending on series |
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Saturday, July 21, 2018
e2v on CCD vs CMOS Sensors
AZO Materials publishes Teledyne e2v article "The Development of CMOS Image Sensors" with a table comparing CCD and CMOS sensors. Although I do not agree with some of the statements in the table, here it is:
This article (and table) must have been prepared by Teledyne's marketing department. Technically speaking, it has more holes than Swiss cheese and should be filed under "disinformation" which is better known as fake news these days. Get just enough facts right to make the article look legitimate, but insert enough disinformation to confuse the reader and sow doubts. Shame on you Teledyne. You impugn your own good image sensor engineers by publishing such material.
ReplyDeleteThe big thing I noticed is fill factor. BSI CMOS devices have as good or better FF than CCDs.
DeleteAre you THE Eric Fossum?
DeleteI bet CMOS-TDI will have much worse antiblooming performance than CCD.
ReplyDeleteComparing apples and oranges! Whereas there are a plenty of different apples and oranges! Frame Transfer CCD, Full Frame CCD, Interline Transfer CCD, EMCCD, CMOS with analog output, sCMOS, ... Each of them has it's special features and drawbacks!
ReplyDeleteAnd whoever has implemented a CCD sensor into a camera knows very well about the sensor's complexity!
-dkf