550D + Magic Lantern Dual ISO finally works!

by syoyo

550D + Magic Lantern Dual ISO finally comes!

http://www.magiclantern.fm/forum/index.php?topic=5582.msg69859#msg69859

Here’s my initial test.

 

Zoom-up of dual iso RAW image. You can see different exposure(ISO) for each alternate lines.

Zoom-up of original RAW image shoot with Dual ISO. You can see different exposure(ISO) for each alternate lines.

Dual ISO records RAW image with different exposure(ISO) for each alternate lines, so we need a processing after shooting(using cr2hdr tool given at Dual ISO page)

No Dual ISO image. You can see color noise in dark region.

Dual ISO

Processed Dual ISO image. You can see less color noise in dark region!

Cool!

I’ve confirmed Dual ISO also works well for RAW video. The problem is processing Dual ISO image with cr2hdr requires a lot of processing time.

I am considering GPGPU optimization for faster Dual ISO movie processing. Stay tuned 😉

 

I am investigating “DSLR as an illuminance meter”.

Dual ISO will definitely improve the accuracy of “DSLR as an illuminance meter”, which will be valuable for physically-accurate IBL and HDRI  footage used in CG/VFX.

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