<div dir="ltr">Hi Tobias and Herbert,<div style>A good pixel has the pixel mask value 0x00 00 00 00 , e.g. 0</div><div style>Best regards,</div><div style>Michael</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Tue, Jul 9, 2013 at 4:26 PM, <span dir="ltr"><<a href="mailto:Tobias.Richter@diamond.ac.uk" target="_blank">Tobias.Richter@diamond.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
That looks like a nice comprehensive list, only I have no idea what value to put for a good pixel.<br>
And as zero is the single special value I'd prefer that for "good".<br>
<br>
Tobias<br>
<br>
________________________________________<br>
From: yayahjb [<a href="mailto:yayahjb@gmail.com">yayahjb@gmail.com</a>]<br>
Sent: 09 July 2013 15:08<br>
To: Discussion forum for the NeXus data format<br>
Cc: Richter, Tobias (DLSLtd,RAL,DIA); <a href="mailto:michael.rissi@dectris.com">michael.rissi@dectris.com</a><br>
Subject: Re: [Nexus] pixel_mask documentation<br>
<div class="HOEnZb"><div class="h5"><br>
The DECTRIS NeXus header specification includes under the detector<br>
specific information:<br>
<br>
<br>
pixel_mask NX_UINT32 Pixel mask with the following bits corresponding<br>
to special pixels:<br>
0 gap<br>
1 dead<br>
2 under responding<br>
3 over responding<br>
4 noisy<br>
5 non uniform<br>
6 cluster<br>
7 virtual pixel<br>
<br>
<br>
<br>
I would suggest conforming the two lists.<br>
<br>
Regards,<br>
Herbert<br>
<br>
On 7/9/13 9:28 AM, <a href="mailto:Tobias.Richter@diamond.ac.uk">Tobias.Richter@diamond.ac.uk</a> wrote:<br>
> Hi all,<br>
><br>
> NXdetector has a pixel_mask field that says:<br>
><br>
> <field name="pixel_mask" type="NX_FLOAT"><br>
> <doc>The pixel mask for the detector. Contains information about dead, blind or high pixels.</doc><br>
> <dimensions rank="2"><br>
> <dim index="1" value="i"/><br>
> <dim index="2" value="j"/><br>
> </dimensions><br>
> </field><br>
><br>
> First I am surprised it is a NX_FLOAT. And second there is no indication what values are used for what type of pixel.<br>
><br>
> I'd assume anything non-zero means 'do not use pixel'.<br>
><br>
> Just to have a start I'd suggest changing this to INT and useing:<br>
><br>
> 0: pixel okay<br>
> 1: dead<br>
> 2: blind (non-existent virtual pixel)<br>
> 3: high<br>
><br>
> If I don't hear otherwise I'd update the definition with that clarification in two weeks.<br>
><br>
> Kind regards,<br>
><br>
> Tobias<br>
><br>
<br>
<br>
</div></div><div class="HOEnZb"><div class="h5">--<br>
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