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A Few CHDK Questions

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Offline reyalp

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Re: Adobe DNG Converter
« Reply #20 on: 09 / June / 2019, 21:51:54 »
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Quote from: BuckSkin on 09 / June / 2019, 20:47:08
Quote from: waterwingz on 09 / June / 2019, 19:55:28
Was the DNG converter applying any sort of lossless compression?

I really cannot tell; all of those MBs had to disappear somewhere.
Adobe DNG converter does default to lossless compression. Most programs that write DNG do, CHDK is the exception because we have very limited resources on the camera.

edit:
The Chasys Draw documentation  states that it uses dcraw for raw support, which explains why it it can load CHDK raw. If does what you need, that's great. Just beware that CHDK raw includes no metadata like exposure, white balance etc.
« Last Edit: 09 / June / 2019, 21:58:57 by reyalp »
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Offline BuckSkin

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Re: A Few CHDK Questions
« Reply #21 on: 09 / June / 2019, 23:46:50 »
Earlier you mentioned the two DNG choices in the CHDK menu, 1.1 and 1.3; thus far, I have had it set on 1.3

When I first began researching this CHDK business, I read a paragraph somewhere in the CHDK "wiki" that very thoroughly explained the pros and cons of both options.
I have now searched and searched for that article to no avail.
Are these two choices the actual DNG versions as mentioned in the Wikipedia DNG article ?

https://en.wikipedia.org/wiki/Digital_Negative
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Offline reyalp

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Re: A Few CHDK Questions
« Reply #22 on: 10 / June / 2019, 00:22:08 »
Quote from: BuckSkin on 09 / June / 2019, 23:46:50
Earlier you mentioned the two DNG choices in the CHDK menu, 1.1 and 1.3; thus far, I have had it set on 1.3

When I first began researching this CHDK business, I read a paragraph somewhere in the CHDK "wiki" that very thoroughly explained the pros and cons of both options.
Maybe here: https://chdk.fandom.com/wiki/CHDK_1.4.0_User_Manual#DNG_version

Quote
Are these two choices the actual DNG versions as mentioned in the Wikipedia DNG article ?
https://en.wikipedia.org/wiki/Digital_Negative
Yes.  The  CHDK option does set the DNG version used in CHDK files. The only difference for CHDK DNGs is that a different method is used to handle bad pixels.
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Offline BuckSkin

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Re: A Few CHDK Questions
« Reply #23 on: 10 / June / 2019, 01:40:15 »
Quote from: reyalp on 10 / June / 2019, 00:22:08
Quote from: BuckSkin on 09 / June / 2019, 23:46:50
Earlier you mentioned the two DNG choices in the CHDK menu, 1.1 and 1.3; thus far, I have had it set on 1.3

When I first began researching this CHDK business, I read a paragraph somewhere in the CHDK "wiki" that very thoroughly explained the pros and cons of both options.
Maybe here: https://chdk.fandom.com/wiki/CHDK_1.4.0_User_Manual#DNG_version

Yes; Thanks! That is it.
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