RE: Is there a maximum threshold plugin for areaDetector?

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Folks,

 

I have made the following changes to NDPluginProcess.  Note that these break backwards compatibility, because I think it would otherwise add confusion and complexity.

 

• Renamed LowClip to LowClipThresh and HighClip to HighClipThresh.
• Added LowClipValue and HighClipValue.
• Pixels whose values are greater than HighClipThresh are replaced with HighClipValue.
• Pixels whose values are less than LowClipThresh are replaced with LowClipValue

 

I have attached these screenshots:

• NDProcess.png                 The medm screen with the new and modified widgets.  The LowClipThresh=300, LowClipValue=0, HighClipThresh=1000, HighClipValue=0.
• WithoutClipping.png       SimDetector image with low and high clipping disabled.
• WithClipping.png             SimDetector imaging with low and high clipping enabled.

 

The new version is in the enhance_clip branch of ADCore on Github.

 

https://github.com/areaDetector/ADCore/tree/enhance_clip

 

Please let me know if this seems OK.

 

Mark

 

 

From: Marco A. Barra Montevechi Filho <marco.filho at lnls.br>
Sent: Tuesday, August 15, 2023 11:37 AM
To: Mark Rivers <rivers at cars.uchicago.edu>; Wang Xiaoqiang <xiaoqiang.wang at psi.ch>; tech-talk at aps.anl.gov
Subject: Re: Is there a maximum threshold plugin for areaDetector?

 

Specifically for Sirius applications, it would be useful to set all values above upper threshold to zero. If i understand the current plugin, it only replaces the values above upper threshold with the upper threshold value itself, right?

Im thinking about a threshold that determine which plugins will be replaced and the actual replacement value

Thanks for your time,

Marco

---

From: Mark Rivers <rivers at cars.uchicago.edu>
Sent: 15 August 2023 12:40
To: Wang Xiaoqiang <xiaoqiang.wang at psi.ch>; Marco A. Barra Montevechi Filho <marco.filho at lnls.br>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: RE: Is there a maximum threshold plugin for areaDetector?

 

I agree that the clipping should be made more flexible.  I think it would be good to make this more general that replacing with 0 or the clip value.  Users might want to replace the clip values with non-zero user-specified values, for example -1, -2, etc.

I will work on this soon.

Mark


-----Original Message-----
From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Wang Xiaoqiang via Tech-talk
Sent: Tuesday, August 15, 2023 1:18 AM
To: Marco A. Barra Montevechi Filho <marco.filho at lnls.br>; tech-talk at aps.anl.gov
Subject: Re: Is there a maximum threshold plugin for areaDetector?


Hi Marco,

In the NDPluginProcess, there is a clipping option. It clamps the pixel values within a given range.

If by masking you mean zero the pixel value, there is no plugins I know of. I had such a need and wrote a request here,
https://github.com/areaDetector/ADCore/issues/492

Best
Xiaoqiang

On 8/14/23 21:11, Marco A. Barra Montevechi Filho via Tech-talk wrote:
> Hi all!
>
> Im using BadPixel plugin to mask some bad pixels in our detectors. The thing is some pixels only show broken values from time to time...
>
> Is there any plugin that would mask any pixel with a value above a certain configurable threshold value?
>
> In a similar line of thought, I noticed the statistics plugin allows the user to configure a minimal value (centroidThreshold) below which the pixel value is not going to be considered. Is there something similar for a *maximum* value?
>
> Thanks for any hints,
>
> Marco
>
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Attachment: NDProcess.png
Description: NDProcess.png

Attachment: WithoutClipping.jpg
Description: WithoutClipping.jpg

Attachment: WithClipping.jpg
Description: WithClipping.jpg