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My DNG Thumbnails are TINY

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My DNG Thumbnails are TINY
« on: 13 / June / 2019, 18:20:32 »
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The camera in question is SD880.

Due to the retention of metadata, I opted to capture ver-1.3 DNG

The CHDK Raw files from this camera have good-sized and very clear thumbnails; whereas, the thumbnails I get with the DNG images are tiny and very scrappy looking; I can barely identify what is in each picture.

Is this normal for CGDK DNG images ?

Is there something I can do to make the DNG thumbnails larger and to have more clarity ?

Thanks for reading and all help is appreciated.

Re: My DNG Thumbnails are TINY
« Reply #1 on: 13 / June / 2019, 22:10:17 »
The CHDK Raw files from this camera have good-sized and very clear thumbnails; whereas, the thumbnails I get with the DNG images are tiny and very scrappy looking; I can barely identify what is in each picture.
CHDK RAW files contain no metadata and no thumbnails. They are just a raw sensor dump saved in a binary file.

So what you are seeing seems to be a function of the PC image processing software you are using.  Tell us about that?
Ported :   A1200    SD940   G10    Powershot N    G16

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Offline reyalp

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Re: My DNG Thumbnails are TINY
« Reply #2 on: 13 / June / 2019, 23:24:55 »
To answer the other part of the question:
Is this normal for CGDK DNG images ?
Yes, it's normal. The CHDK DNG thumbnail is generated on camera and is very primitive.
Quote
Is there something I can do to make the DNG thumbnails larger and to have more clarity ?
There is nothing you can do to make CHDK generate better thumbnails. Other software might be able to generate better previews.
Don't forget what the H stands for.

Re: My DNG Thumbnails are TINY
« Reply #3 on: 13 / June / 2019, 23:29:00 »
To answer the other part of the question:
Is this normal for CGDK DNG images ?
Yes, it's normal. The CHDK DNG thumbnail is generated on camera and is very primitive.
Quote
Is there something I can do to make the DNG thumbnails larger and to have more clarity ?
There is nothing you can do to make CHDK generate better thumbnails. Other software might be able to generate better previews.

Thanks; I was afraid that was as good as it was going to get, while also hoping that I had made some mistake in my set-up.
"Primitive" is a very good description.


 

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