Dji raw images instead of jpg

#1

hello there.

is it possible to use dji raw images instead of jpg for odm processing?
the images clearly have way more information than the POS jpg compressed ones.

thanks

#2

Not at this stage but you could convert to PNG which is lossless and then process that way. Make sure you do 8-bit PNGs.

#3

But does png retain exif information? I was thinking more in the line of a JPG with 0 compression …

Thanks

#4

You can have all the exif data in the PNG. It’s better than JPG with 0 compression, as all JPGs are lossy, even the least lossy. But, a really high quality JPG is close to indiscernible from a PNG and a much smaller file to boot, so your approach would work and has advantages.

#5

Well after some tests:

original JPG from the drone is 5~7mb;
original DNG from the drone is about 24mb;
converted DNG->PNG is about 56mb;
converted DNG->JPG (0 compression) is about 15mb;

I’m happy with the throw back of doubling the filesize but getting a way better JPG file to process.

For the sake of it, i’ll make a dataset with both JPG/DNG and test the converted DNG into HQ JPG (if there is such a thing) and process on webodm the 3 versions. JPG, DNG and (converted)JPG

Thanks!

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