Green pixels Canon D20 - page 2 - General Help and Assistance on using CHDK stable releases - CHDK Forum

Green pixels Canon D20

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Offline philmoz

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Re: Green pixels Canon D20
« Reply #10 on: 06 / September / 2015, 19:03:29 »
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That should happen automatically - I just tried a quick test and PC CC (2015.0.1) correctly removed the bad pixels from the DNG file.

Can you upload your DNG to a file share site (e.g. dropbox, google drive, etc) and post the link here.

Phil.

Unfortunately I deleted the image from my kitchen but here is another image from yesterday. Lots of green pixels and even some blue ones in the orange koi carp  :) The file is DNG 1.3
https://dl.dropboxusercontent.com/u/66272586/CRW_6315.DNG
Very interesting to see if it works for you. I also have PS 2015.0.1

This seems to be a bug in the new version of CC (also affects Lightroom which uses the same RAW engine).

Lightroom 5.7.1 fixes the bad pixels correctly in your image.

Not sure why the images from my camera (IXUS310) are corrected in CC 2015; but yours aren't.

Phil.
CHDK ports:
  sx30is (1.00c, 1.00h, 1.00l, 1.00n & 1.00p)
  g12 (1.00c, 1.00e, 1.00f & 1.00g)
  sx130is (1.01d & 1.01f)
  ixus310hs (1.00a & 1.01a)
  sx40hs (1.00d, 1.00g & 1.00i)
  g1x (1.00e, 1.00f & 1.00g)
  g5x (1.00c, 1.01a, 1.01b)
  g7x2 (1.01a, 1.01b, 1.10b)

Re: Green pixels Canon D20
« Reply #11 on: 07 / September / 2015, 05:26:30 »

It looks like you have default crop (DNG Crop Size in the CHDK menu) set to "Full". This means that the large black areas on the top/left will be included, as well as somewhat darker borders that contain image data. I'd generally suggest using "active" or "jpeg" except for debugging, but again wouldn't expect this to affect badpixel handling.


Yes I have set it to "Full" since I prefer to crop the images manually since sometimes "active" or "jpeg" crops a bit too much.


This seems to be a bug in the new version of CC (also affects Lightroom which uses the same RAW engine).

Lightroom 5.7.1 fixes the bad pixels correctly in your image.

Not sure why the images from my camera (IXUS310) are corrected in CC 2015; but yours aren't.

Phil.

Thanks for figuring this out. I installed Lightroom 5.7.1 30-day trial and is works fine. But if I choose "Edit in Photoshop CC" the bad pixels are back! So I tried Exporting as DNG from Lightroom 5.7.1 but that did not work either. However Export as TIFF worked fine.
Now I have a way of converting the images I have shot as DNG 1.3  :)

But the important question is: Is there any reason of saving as DNG 1.3 instead of DNG 1.1? I read somewhere that saving as DNG 1.3 is faster but are there any other advantages?
Future compatibility maybe?

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Offline philmoz

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Re: Green pixels Canon D20
« Reply #12 on: 07 / September / 2015, 08:02:17 »
But the important question is: Is there any reason of saving as DNG 1.3 instead of DNG 1.1? I read somewhere that saving as DNG 1.3 is faster but are there any other advantages?

For cameras with lots of bad pixels it makes a difference; but yours doesn't have that many so doing it in camera (1.1) is ok.

Phil.
CHDK ports:
  sx30is (1.00c, 1.00h, 1.00l, 1.00n & 1.00p)
  g12 (1.00c, 1.00e, 1.00f & 1.00g)
  sx130is (1.01d & 1.01f)
  ixus310hs (1.00a & 1.01a)
  sx40hs (1.00d, 1.00g & 1.00i)
  g1x (1.00e, 1.00f & 1.00g)
  g5x (1.00c, 1.01a, 1.01b)
  g7x2 (1.01a, 1.01b, 1.10b)

Re: Green pixels Canon D20
« Reply #13 on: 07 / September / 2015, 08:47:21 »

For cameras with lots of bad pixels it makes a difference; but yours doesn't have that many so doing it in camera (1.1) is ok.

Phil.

When I created a badpixel.bin file it said that the camera has around 28 800 bad pixels. I sounded like an awful lot but maybe it is not that bad?


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Offline philmoz

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Re: Green pixels Canon D20
« Reply #14 on: 07 / September / 2015, 09:14:32 »

For cameras with lots of bad pixels it makes a difference; but yours doesn't have that many so doing it in camera (1.1) is ok.

Phil.

When I created a badpixel.bin file it said that the camera has around 28 800 bad pixels. I sounded like an awful lot but maybe it is not that bad?

No, that's not a lot. My Ixus 310 has 180,000 or so.

Phil.
CHDK ports:
  sx30is (1.00c, 1.00h, 1.00l, 1.00n & 1.00p)
  g12 (1.00c, 1.00e, 1.00f & 1.00g)
  sx130is (1.01d & 1.01f)
  ixus310hs (1.00a & 1.01a)
  sx40hs (1.00d, 1.00g & 1.00i)
  g1x (1.00e, 1.00f & 1.00g)
  g5x (1.00c, 1.01a, 1.01b)
  g7x2 (1.01a, 1.01b, 1.10b)

Re: Green pixels Canon D20
« Reply #15 on: 07 / September / 2015, 09:19:33 »

No, that's not a lot. My Ixus 310 has 180,000 or so.

Phil.

Wow! That sure is a lot!  :o  Thanks again for helping me understand this!
 

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Offline reyalp

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Re: Green pixels Canon D20
« Reply #16 on: 07 / September / 2015, 13:32:51 »
But the important question is: Is there any reason of saving as DNG 1.3 instead of DNG 1.1? I read somewhere that saving as DNG 1.3 is faster but are there any other advantages?
Future compatibility maybe?
The speed difference should be very minor.

As Phil alluded too, the badpixel list can take a lot of memory. You can check "miscellaneous"-> "show memory info" to see how much RAM is available to CHDK. 28k bad pixels shouldn't be a problem on most cameras, but if the port has a very low amount of RAM available already, it could be.
Don't forget what the H stands for.

Re: Green pixels Canon D20
« Reply #17 on: 07 / September / 2015, 14:46:51 »
As Phil alluded too, the badpixel list can take a lot of memory. You can check "miscellaneous"-> "show memory info" to see how much RAM is available to CHDK. 28k bad pixels shouldn't be a problem on most cameras, but if the port has a very low amount of RAM available already, it could be.

Is this enough free RAM for keeping track of 28 800 bad pixels?


Re: Green pixels Canon D20
« Reply #18 on: 07 / September / 2015, 16:06:38 »
Is this enough free RAM for keeping track of 28 800 bad pixels?
That's way on the low side for almost anything you'd want to do with CHDK.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Green pixels Canon D20
« Reply #19 on: 07 / September / 2015, 16:20:24 »
Is this enough free RAM for keeping track of 28 800 bad pixels?
That's way on the low side for almost anything you'd want to do with CHDK.

Oh, I see. Is it possible to increase the free RAM? I have a 16GB SDHC card.

 

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