https://www.x-ray-forum.net/

Compensation Principle III
https://www.x-ray-forum.net/./22161106nx65772/compensation-principles-i-to-iii-f89/compensation-principle-iii-t74.html		 Page 1 of 1
Author:  Klaus [ 20.12.2019, 18:52 ]
Post subject:  Compensation Principle III
Compensation of local contrast reduction due to bad pixel interpolation may lead to a loss in information.
Please refer to chapter
*** Links are hidden from guests. Please register and login. ***
for detailed information.
Author:  Colin Gan [ 18.02.2022, 09:33 ]
Post subject:  Re: Compensation Principle III
Hi Klaus:

Recently, I have been focusing on Compensation Principle.

In Compensation Principle III , you mentioned it's for "local unsharpness",
however in the paper
*** Links are hidden from guests. Please register and login. ***
, above fig.6, "The interpolation of bad pixels can reduce the contrast of very small indications ",

So it seems that compensation principle III is for contrast loss (caused by calibration of bad pixel), instead of unsharpness.

Almost all of the DR standards said compensation principle III is for "local unsharpness", so why is unsharpness?
Author:  Klaus [ 19.02.2022, 10:51 ]
Post subject:  Re: Compensation Principle III
Hi Colin,
you are right, the third compensation principle is for local contrast loss ==> see
*** Links are hidden from guests. Please register and login. ***
.
I corrected it in my first posting here.
Thank you for this hint :cap:
Author:  Colin Gan [ 27.02.2022, 07:22 ]
Post subject:  Re: Compensation Principle III
Hi Klaus:

Since CNR=C*SNR, and when the voltage increases, the C will decrease and SNR will rise.

Maybe the CNR could be rewritten as a function of the voltage, and the best CNR can be calculated by the derivative of voltage in that function.

So, has this work been done :'( ?
I think how to set a good voltage is quite useful.
Page 1 of 1 All times are UTC + 1 hour
Powered by phpBB® Forum Software © phpBB Group
https://www.phpbb.com/