Sigma RAW - spp has a way to do 2x output

[GaryLH]

I recently discovered an interesting feature of SPP. I had been ignoring the out size pull down until recently. I notice that there was a double size option.

Excuse the crappy shot..

Today I noticed a lizard peeking out of my backyard wall. Harsh middle of the afternoon sun. Shot with SD1m and the 18-200 zoom at 200mm 1/640@f9. I was actually testing something else out when I spotted him. He was about 25-30 feet away from me. The picture below is around a 60% crop.

The same picture using the 2X output option. The original file size was 80MB, the 2X is 354MB. About the same crop, this time it is around a 30% crop instead of a 60.

I think the original is a bit cleaner, but no way after cropping u could ever print big w/ it. Anyway what do u think?

I am sure the old hands know about this, but its new to me
Gary

 

[Keith]

I spotted that function when outputing files and wondered about it? Still don't understand it.

 

[GaryLH]

Think of it as an imaginary 30mp (90 in foveon speak) sensor output. It doubles the dimensions of the picture is every dimension during the save to tiff which is why a 80mb tiff file from a large raw files becomes a 354mb tiff file instead.

Gary

 

[den_sh]

Think of it as an imaginary 30mp (90 in foveon speak) sensor output. It doubles the dimensions of the picture is every dimension during the save to tiff which is why a 80mb tiff file from a large raw files becomes a 354mb tiff file instead.

Gary

If you double in both directions you get 4 times more megapixels. So it should be 60 megapixels but not 30. Right?

 

[GaryLH]

Opps

Your right. The original dimensions were 4704x3136 the 2x file is now 9408x6272 a 59mp equiv..

Gary

 

[Eric T]

But how does this work? Does the software just estimate what the "new pixels" are showing based on the neighboring real pixels?

 

[mugent]

But how does this work? Does the software just estimate what the "new pixels" are showing based on the neighboring real pixels?

Yes, like a Bayer sensor... ;-)

 

[bk1970]

Thanks for this, most interesting. Will give it a try.