Suggest a script for zero noise technique - Script Writing - CHDK Forum
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Suggest a script for zero noise technique

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Offline markanini

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Suggest a script for zero noise technique
« on: 01 / December / 2015, 19:41:36 »
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I want to bracket two exposures, One normal followed by one that is +4 f-stops by reducing the shutter speed. If possible with minimal delay between the two.

More about the zero noise technique: http://www.guillermoluijk.com/article/nonoise/index_en.htm

My camera is Canon s90.
« Last Edit: 01 / December / 2015, 20:41:31 by markanini »
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Offline waterwingz

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Re: Suggest a script for zero noise technique
« Reply #1 on: 01 / December / 2015, 20:01:06 »
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline markanini

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Re: Suggest a script for zero noise technique
« Reply #2 on: 06 / December / 2015, 08:31:29 »
I'm getting a unexpected symbol error when running the fast HDR script. When saving in notepad I got a non-ASCII warning. Other scripts I copied seem to work fine. Any ideas?
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Offline waterwingz

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Re: Suggest a script for zero noise technique
« Reply #3 on: 06 / December / 2015, 11:23:36 »
Quote from: markanini on 06 / December / 2015, 08:31:29
I'm getting a unexpected symbol error when running the fast HDR script. When saving in notepad I got a non-ASCII warning. Other scripts I copied seem to work fine. Any ideas?
It's either an issue with how you cut & pasted the script or with the script name you used.  The script name needs to have the extension .lua.

I've attached a copy of the script to make things easier.
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Offline markanini

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Re: Suggest a script for zero noise technique
« Reply #4 on: 06 / December / 2015, 18:30:30 »
The attached script runs fine. It hangs the camera after three shots though.
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Offline srsa_4c

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Re: Suggest a script for zero noise technique
« Reply #5 on: 06 / December / 2015, 19:17:44 »
Quote from: markanini on 06 / December / 2015, 18:30:30
The attached script runs fine. It hangs the camera after three shots though.
By "hang" do you mean the cam becomes unresponsive or it powers off with extended lens (aka it crashes)?
If it does crash, can you get a romlog?
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Offline markanini

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Re: Suggest a script for zero noise technique
« Reply #6 on: 06 / December / 2015, 19:26:32 »
Code: [Select]
ASSERT!! FileSem.c Line 140
Occured Time  2015:12:02 03:57:53
Task ID: 14286876
Task name: SpyTask
SP: 0x0038A918
StackDump:
0x00000000
0xFF86C9F4
0x0000008C
0x000029D0
0x09400015
0x00157FA4
0x19980218
0x19980218
0x19980218
0x19980218
0x19980218
0xFF86C948
0x00000000
0xFF8351D8
0x00000000
0xFF834E7C
0x001629D4
0x00000004
0x19980218
0x001564B8
0x00000041
0x001453C9
0x19980218
0x19980218
0x19980218
0x19980218
0x19980218
0x19980218
0x19980218
0x00372E94
0x19980218
0x19980218
0x19980218
0xFF816A20
0x19980218
0x19980218
0x00001008
ShootConDump:
0f 0f 0f 0f 0f 0f 0f 0f 0f 0f
CameraConDump:
08 0f 0f 0f 0f 0f 0f 0f 0f 0f

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Offline waterwingz

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Re: Suggest a script for zero noise technique
« Reply #7 on: 06 / December / 2015, 19:32:01 »
Quote from: markanini on 06 / December / 2015, 18:30:30
The attached script runs fine. It hangs the camera after three shots though.
There is a somewhat slower but more reliable version of the script posted just below at HDR Fast Shooter.  I've attached it here as well.
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Offline markanini

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Re: Suggest a script for zero noise technique
« Reply #8 on: 06 / December / 2015, 19:58:53 »
I works! Could you suggest a modification that will make the script do "+/-" (in CHDK menu terms)? Even better for me would be "+".
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Offline waterwingz

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Re: Suggest a script for zero noise technique
« Reply #9 on: 06 / December / 2015, 20:20:48 »
Quote from: markanini on 06 / December / 2015, 19:58:53
I works! Could you suggest a modification that will make the script do "+/-" (in CHDK menu terms)? Even better for me would be "+".
Sorry - maybe I'm being slow tonight but I'm not sure what you are asking for here.
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Ported :   A1200    SD940   G10    Powershot N    G16
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