CHDK on Canon SX20IS Superfine,where are you???' - General Help and Assistance on using CHDK stable releases - CHDK Forum
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CHDK on Canon SX20IS Superfine,where are you???'

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Offline ianmcculloch

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CHDK on Canon SX20IS Superfine,where are you???'
« on: 15 / September / 2010, 01:48:57 »
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Offline SkyWalker9

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #1 on: 17 / September / 2010, 15:41:23 »
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Offline ianmcculloch

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #2 on: 25 / September / 2010, 01:16:21 »
SkyWalker9, it's just you told me and the quality of the photos on Superfine is excellent!
Definition have improved markedly.
Thanks a lot.
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Offline axux15

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #3 on: 22 / October / 2010, 01:10:39 »
Is there a superfine option for older camera models in chdk ?   I can't find it.
And my camera itself has superfine(jpeg) quality option in its normal setting menus, is it same thing?
But im using crw(in dng format) for maximum quality.
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Offline fe50

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #4 on: 22 / October / 2010, 01:31:09 »
Quote from: axux15 on 22 / October / 2010, 01:10:39
Is there a superfine option for older camera models in chdk ?
No.
CHDK's "SuperFine" option just activates the Canon SF mode on cameras where Canon disabled this mode in the menu.

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And my camera itself has superfine(jpeg) quality option in its normal setting menus, is it same thing?
Yes.

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But im using crw(in dng format) for maximum quality.
So the JPEG setting doesn't matter at all...
RAW files are always unmodified sensor data, no setting (neither in CHDK nor in the Canon menu) does influence the quality of the raw image.
Only the badpixel mapping may change some pixels (in RAW and in JPEG images) to eliminate defective pixels.
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Offline beerninja

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #5 on: 13 / November / 2010, 19:08:55 »
I'm thinking of buying this camera and just wondering if the CHDK video bitrate controls work with the sx20?

Thanks
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Offline reyalp

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #6 on: 13 / November / 2010, 19:13:41 »
It looks like video quality control is implemented on this camera. This isn't exactly a bit rate control.

Just FYI, this seems to have very limited value on recent cameras (all the ones that use H264 rather than MJPEG). You get much bigger files without noticeable quality improvement.
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Offline beerninja

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #7 on: 14 / November / 2010, 15:10:13 »
Quote from: reyalp on 13 / November / 2010, 19:13:41
It looks like video quality control is implemented on this camera. This isn't exactly a bit rate control.

Just FYI, this seems to have very limited value on recent cameras (all the ones that use H264 rather than MJPEG). You get much bigger files without noticeable quality improvement.

Thanks for the info reyalp.  Has anyone here tried recording with the highest CHDK quality setting to compare it with the default?
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Offline reyalp

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Re: CHDK on Canon SX20IS Superfine,where are you???'
« Reply #8 on: 14 / November / 2010, 15:29:22 »
Quote from: beerninja on 14 / November / 2010, 15:10:13
Thanks for the info reyalp.  Has anyone here tried recording with the highest CHDK quality setting to compare it with the default?
I haven't seen it on this camera, but results from others should be applicable. See http://eugenia.queru.com/2010/08/26/is-chdk-worth-it-for-video/
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