DNG 1.2 : I am not a technician to understand the dedicated wiki page about it,so if one can answer me in simply way :- how are the improvements respect 1.1 version ?- why not implemeted in CHDK and "jumped" directly to 1.3 ?Thanks in advance.
The only change implemented in CHDK DNG between 1.1 and 1.3 was that 1.3 no longer applies bad pixel correction in the camera. This means it does not need a badpixel.bin file.This change was made because many people were having trouble creating badpixel.bin files using CHDK on their cameras. The reason for that is unknown but it might be due to small sensor reading variations from picture to picture that the code to create a bad pixel file did not like.
Using 1.3 should also be slightly faster as the camera no longer needs to process the badpixel.bin file for every shot.
DNG 1.2 was not implemented because nobody volunteered to do it. Probably because there was not a good reason to do it. As mentioned above, DNG 1.3 was only implemented to solve a CHDK problem on some camera, not for an photographic reason.
Another reason to use 1.3 is that the badpixel.bin can take a substantial amount of memory. On some cameras, this is enough to cause problems.It's also worth pointing that except for the handling of bad pixels, all RAW / DNG produced by CHDK have exactly the same image data.
Does this mean that it would not be too hard to put the code back into CHDK to apply badpixel.bin to 1.3 DNGs?
So... from the above 2 quotes does that mean that there is no difference between CHDK created 1.1. and 1.3 DNGs?
More specifically: Is CHDK adding opcodes and parameters to the 1.3 DNGs?
Is CHDK adding opcodes and parameters to the 1.3 DNGs?
Here's my basic issue - I have always used CHDK for bracketing and DNGs. Picasa, IrfanView, and Photomatix would seamlessly handle the 1.1 DNGs. If CHDK-created 1.3 DNGs include opcodes and parameters that I may want to take advantage of at some point in the future I will have to make a big adjustment in my PP workflow.
Shot a lot of 1.3 DNGs that I'll have to run through PS, but at least it is a one-time effort.
waterwingz:Thanks for the clarification. nafraf finished up the 1.00a port for my Elph310 just a couple of days before I spent a week in Yosemite and Bishop, CA. Shot a lot of 1.3 DNGs that I'll have to run through PS, but at least it is a one-time effort.
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