Custom AutoISO - page 2 - Feature Requests - CHDK Forum
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Custom AutoISO

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Offline nirschi

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Re: Custom AutoISO
« Reply #10 on: 09 / February / 2008, 14:22:57 »
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Quote from: mkmenuts on 09 / February / 2008, 13:27:18
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I never studied negative side effects of IS using the camera on tripod.
Are there any?

On some cameras, the IS detects the tripod and shuts-off. From my SD700 tests, it is better to manually turn off IS for long (over 1 second) exposures.

mkmenuts

OK, disable IS if ISO80 or ISO override < 80 and custom AutoISO is on.

Cheers

« Last Edit: 09 / February / 2008, 15:10:05 by nirschi »
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Offline fingalo

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Re: Custom AutoISO
« Reply #11 on: 09 / February / 2008, 15:05:59 »
Regarding IS turn off, Ewavr made in his own 710 build possibility to autoturn off IS when exp > 1sec...
In his code there are functions to start stop IS. :)

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Offline nirschi

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Re: Custom AutoISO
« Reply #12 on: 09 / February / 2008, 15:11:43 »
Quote from: nirschi on 09 / February / 2008, 14:22:57
OK, disable IS if ISO80 or ISO override < 80 and custom AutoISO is on.

Binding it to exposure > 1s is much better!

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Offline Barney Fife

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Re: Custom AutoISO
« Reply #13 on: 09 / February / 2008, 15:12:38 »
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« Last Edit: 22 / April / 2008, 11:23:31 by Barney Fife »
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[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye
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Offline fingalo

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Re: Custom AutoISO
« Reply #14 on: 09 / February / 2008, 15:31:35 »
I really enjoy the workflow we have here, whenever an idea come up it expands very quickly 'out of the box' (at least my box...) :)
That's the power of having an open development, think you already said that, Barney. I agree!
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Offline nirschi

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Re: Custom AutoISO
« Reply #15 on: 14 / February / 2008, 01:59:55 »

Hi mkmenuts,

Another idea to improve Custom AutoISO...

Quote
Additionally, a new Motion Detection function linked to the camera's High ISO Auto mode improves image clarity by raising ISO speeds (and shutter speeds) for fast-moving subjects or lowering ISO speeds to reduce noise when the subject is stationary

Find the string "linked to the camera's High ISO Auto mode" in this Canon U.S.A-Press Release Schedule

Cheers
  nirschi
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Offline mkmenuts

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Re: Custom AutoISO
« Reply #16 on: 18 / February / 2008, 07:18:54 »
Nirschi,

Thanks for the suggestion. I think we are missing the data on speed of motion right now, and if we have it -It might be better to start off with a script to switch between ISO AUTO and ISO HI.

Anyway, I'm attaching the camera-independent Custom AutoISO code here, feel free to integrate it into SVN (it has the previous suggestion you made implemented already).

mkmenuts
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Offline nirschi

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Re: Custom AutoISO
« Reply #17 on: 19 / February / 2008, 01:56:20 »
Hi mkmenuts,

Thank you for the source, I will add Custom AutoISO to my upcoming private release.

But I'm not able to add it to the trunk. I have been blamed by AllBest to change "his" trunk code.
Obviously, there are territorial claims and invisible border lines, but no-one talks about.
I asked in the forum: What are the rules? - no reply.

I'm not willing to work out the rules the hard way, by trial and error/punishment. Sorry.

Cheers
  nirschi
« Last Edit: 19 / February / 2008, 02:31:34 by nirschi »
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Offline mkmenuts

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Re: Custom AutoISO - Feature expansion
« Reply #18 on: 30 / March / 2008, 03:55:58 »
Hi all,

I have 2 more ideas for Custom AutoISO, please comment...

1. Add an Auto-Off for IS above some exposure time (e.g 1 second) - Assuming this will be done on a tripod. This will replace the missing IS On/Off button on compact cameras.

2. Add an option to "Avoid overexposure". This will reduce the overall exposure (by 0-1 EV) via an ISO reduction based on the histogram data. This is better than manually doing expo correction because it is both automatic and reduces noise.

Your thoughts?

mkmenuts
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