Post on 07-Aug-2015
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CCD versus CMOS for Industrial Cameras Update
Change over from CCD to CMOS is now
CMOS PERFORMANCE
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CCD versus CMOS 2015
• CMOS has evolved much faster than CCD - Big investments in cell phone cameras/consumer market.
• Latest CMOS image sensors perform even better than CCD on key image quality parameters:
- Sensitivity in low light- MTF- Blooming & smear- Dynamic range
• Even with high quality of the starting image sensor, image processing is required by the camera manufacturer.
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4 electrons read noise
CMOS (IMX174)
CCD (ICX674)
Performance improvements with CMOS Low light color (300 mLux)
The light level of 0.3 Lux is just an example; it doesn’t show the limiting light levels of these image sensors.
9 electrons read noise
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Performance improvements with CMOSQE/Dark noise (Sensitivity) vs. Various Wavelengths
the CMOS sensor (IMX174) is more
sensitive than the CCD sensor (ICX674) at all wavelengths and at
increased temperatures
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Performance improvements with CMOS MTF
The improved MTF of the CMOS sensor (IMX174)
over the CCD sensor (ICX674) is most evident
in the longer wavelengths
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TMX7 (ICX674) TMX74 (IMX174)
Performance improvements with CMOSBlooming and Smear
CCDICX674
CMOSIMX174
Smear only occurs with CCD image sensor
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Performance improvements with CMOSBlooming and Smear
CMOSIMX174
CCDICX674
the CCD sensor has a more severe smear
artifact from the flash outside the integration
period
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CMOS performance must be maximized by camera manufacturer
Competitor IMX174 Camera Adimec TMX74 (IMX174 camera)
Image sensor related image processing is required and should be calibrated over temperature, such as color processing,
defect pixel correction, uniformity correction (column, row, shading), and linearity
correction.
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Competitor IMX174 Camera Adimec TMX74
All image processing is done to optimize image
quality and take full advantage of the MTF of
the image sensor..This is critical for real-time decision-making.
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CCD versus CMOS 2015 Notes
• The images included are stills from real time video at Full HD and 60 frames per second.
• The light level of 0.3 Lux is just an example; it doesn’t show the limiting light levels of these image sensors.
• The CCD camera uses a top quality image sensor. • Color images are color-processed; lower light levels can be
achieved with monochrome image sensors. • We wanted to compare real life situations so the cameras are
uncooled and running at full speed around room temperature.• The scene is just package materials to show off what can be
done.