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Crashing during flat capturing

Posted: Wed Oct 17, 2018 7:26 pm
by remyastro
Hi,

I tried to capture flats using my Atik 314L camera and Sharpcap 3.2

Every things went well till Sharpcap crashed at the end of the capture (see screen shots)

Same problem occured whether I checked tick box 'Capture and subtract bias frames' or not.
This problem does not occur with Sharpcap 3.1.

Set up : Atik 314L camera, Windows 7 PRO

Please help!

Cheers
Remy
Flat.pdf
Capturing flat with Sharpcap 3.2
(622.33 KiB) Downloaded 42 times

Re: Crashing during flat capturing

Posted: Wed Oct 17, 2018 8:51 pm
by admin
Hi Remy,

Two possibilities here :

1) You have a very old CPU that does not support the code that I use for high speed flat correction. If your CPU does not support SSE4 instructions then flat frame correction will not work for you. You should typically be OK with CPUs made less than about 8 years ago.

2) There was a bug in this section of code that I fixed today and is in 3.2.5825 - under some circumstances the code was reading beyond the end of the frame data and causing a crash. Therefore updating to this new version may help.

In the case of 1) there is a check to stop you selecting a flat frame if your CPU is unsuitable - unfortunately the capture flat frame option bypasses this check - I will fix.

cheers,

Robin

Re: Crashing during flat capturing

Posted: Thu Oct 18, 2018 7:39 am
by remyastro
Hi Robin,

Thank you for your quick answer.
Unfortunatelly I am in case 1 with my AMD Athlon II processor :(

Nevertheless, as Sharpcap saves a flat picture before crashing, can I use this image for further pre-processing?
Thank you.

Cheers.
Remy

Re: Crashing during flat capturing

Posted: Fri Oct 19, 2018 3:28 pm
by remyastro
Hi Robin,

After testing again, what I have understood is that I can create 'valid' flat frames using Sharpcap, but I cannot use them (and any other flat frame created by other softwares) with Sharpcap because my old CPU does not support SSE4 instructions.

Am I right?
Thank you.

Cheers
Remy

Re: Crashing during flat capturing

Posted: Fri Oct 19, 2018 5:47 pm
by admin
Hi Remy,

yes, that's right.

cheers,

Robin