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Author Topic: Camera sensor characteristics  (Read 3628 times)

Emmett

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Camera sensor characteristics
« on: January 08, 2018, 02:48:06 PM »

It's been a while since I have been looking for variables that is measured for sensor characterisation and benchmarking. There are some literatures out on the net and yet I cannot figure out which ones can be most important.  I am also looking for independant sensor properties, for example FWC and sensor pitch are (to my knowledge) independent variables that will influence the sensor response/capabilities in different lighting scenarios.  I appreciate if someone could introduce me a source or provide me the answer.



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Hank Keeton

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Re: Camera sensor characteristics
« Reply #1 on: January 08, 2018, 03:28:15 PM »

In my humble estimation, the resources provided by Roger Clark (www.clarkvision.com) are the best I've encountered.

He is very bright...deeply informed...and committed.

See what you think.

Cheers....

Hank
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....always seeking.....

SeeingTao.com

DP

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Re: Camera sensor characteristics
« Reply #2 on: January 08, 2018, 03:58:00 PM »

In my humble estimation, the resources provided by Roger Clark (www.clarkvision.com) are the best I've encountered.
bclaff @ http://www.photonstophotos.net
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DP

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Re: Camera sensor characteristics
« Reply #3 on: January 08, 2018, 04:00:16 PM »

It's been a while since I have been looking for variables that is measured for sensor characterisation and benchmarking.

if you are a technical vs just a reader = Albert Theuwissen's blog @ http://harvestimaging.com/blog/
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Emmett

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Re: Camera sensor characteristics
« Reply #4 on: January 08, 2018, 11:23:08 PM »

Thanks Hank and DP for your reply.  :)
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xpatUSA

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Re: Camera sensor characteristics
« Reply #5 on: January 11, 2018, 12:59:53 AM »

In my humble estimation, the resources provided by Roger Clark (www.clarkvision.com) are the best I've encountered.

+1 to that. He has a big tabulated list of sensors on one of his page; only thing being that it is not up to date as in the sensors are all about 10+ years.

For example Foveon F7 (Sigma SD10) but nothing later, e.g. Merrill.
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best regards,

Ted

Jim Kasson

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Re: Camera sensor characteristics
« Reply #7 on: March 03, 2018, 05:10:28 PM »

It's been a while since I have been looking for variables that is measured for sensor characterisation and benchmarking. There are some literatures out on the net and yet I cannot figure out which ones can be most important.  I am also looking for independant sensor properties, for example FWC and sensor pitch are (to my knowledge) independent variables that will influence the sensor response/capabilities in different lighting scenarios.  I appreciate if someone could introduce me a source or provide me the answer.

If you want to invest some time and are fairly technical, this is pretty comprehensive:

https://amazon.com/Photon-Transfer-Press-Monograph-PM170/dp/0819467227/ref=sr_1_1?ie=UTF8&qid=1520114919&sr=8-1&keywords=photon+transfer+spie

It emphasizes the measurement of sensors.

In practice, FWC and pitch are not independent variables.

Jim

Emmett

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Re: Camera sensor characteristics
« Reply #8 on: March 03, 2018, 11:43:57 PM »

If you want to invest some time and are fairly technical, this is pretty comprehensive:

https://amazon.com/Photon-Transfer-Press-Monograph-PM170/dp/0819467227/ref=sr_1_1?ie=UTF8&qid=1520114919&sr=8-1&keywords=photon+transfer+spie

It emphasizes the measurement of sensors.

In practice, FWC and  are not independent variables.

Jim

Thanks Jim for the link. Maybe I haven't put it clearly.  I would wanted to know if there are other attributes that I can collect their data and are affected by other variables, for example sensor size, FWC or Pitch are physical characteristics of a sensor and do not vary during photon acquisition.
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Jim Kasson

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Re: Camera sensor characteristics
« Reply #9 on: March 04, 2018, 11:47:49 AM »

Thanks Jim for the link. Maybe I haven't put it clearly.  I would wanted to know if there are other attributes that I can collect their data and are affected by other variables, for example sensor size, FWC or Pitch are physical characteristics of a sensor and do not vary during photon acquisition.

RN, PRNU, QE?

In DR-Pix sensors, RN is a strong non-monotonic function of ISO setting.

You could break down RN into frame-to-frame invariant and variable components if you can get data.

I believe in modern sensors, PRNU is negligible.

Jim

Emmett

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Re: Camera sensor characteristics
« Reply #10 on: March 05, 2018, 03:19:44 AM »

RN, PRNU, QE?

In DR-Pix sensors, RN is a strong non-monotonic function of ISO setting.

You could break down RN into frame-to-frame invariant and variable components if you can get data.

I believe in modern sensors, PRNU is negligible.

Jim

Is background noise an intrinsic characteristics of a photon detector?
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Jim Kasson

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Re: Camera sensor characteristics
« Reply #11 on: March 05, 2018, 10:41:16 AM »

Is background noise an intrinsic characteristics of a photon detector?

You mean dark-field noise? There are other sources than the photodiode itself, and they are usually larger. I don't know any way to measure the noise of the photodiode itself. I'm sure it can be modeled, though.

https://www.thorlabs.com/images/TabImages/Photodetector_Lab.pdf

https://www.rp-photonics.com/spotlight_2009_12_13.html

https://www.st-andrews.ac.uk/~ctab/MSc_Oft/Lecture_Notes/lecture_10.pdf

http://ecee.colorado.edu/~mcleod/teaching/ugol/lecturenotes/Lecture%209%20Photodetection.pdf

Jim

DP

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Re: Camera sensor characteristics
« Reply #12 on: March 05, 2018, 11:11:03 AM »

sorry to hijack the thread... what Fuji might be doing @ the edges of the sensor (on sensor, post ADC, wherever, etc) near clipping in blue & green channels ? this is Fuji X-H1

raws are (sequence of clipped raws @ all nominal ISO values) = https://www.amazon.com/clouddrive/share/jV7P00eJdyN1exO14BSXNqERj9Iw01kc7mQtz49VVVm



see the pattern near borders, like somebody bites into it... red channel is perfectly clipped by firmware
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Emmett

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Re: Camera sensor characteristics
« Reply #13 on: March 07, 2018, 05:06:37 PM »

You mean dark-field noise? There are other sources than the photodiode itself, and they are usually larger. I don't know any way to measure the noise of the photodiode itself. I'm sure it can be modeled, though.

https://www.thorlabs.com/images/TabImages/Photodetector_Lab.pdf

https://www.rp-photonics.com/spotlight_2009_12_13.html

https://www.st-andrews.ac.uk/~ctab/MSc_Oft/Lecture_Notes/lecture_10.pdf

http://ecee.colorado.edu/~mcleod/teaching/ugol/lecturenotes/Lecture%209%20Photodetection.pdf

Jim

Thanks Jim, very helpful indeed. :)
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